Release v5.3.27

This commit introduces infrastructure to differentiate between
programmatic setting of a variable in an EvaluationContext versus the
assignment of a variable within a SpEL expression using the assignment
operator (=). In addition, this commit disables variable assignment
within expressions when using the SimpleEvaluationContext.

Closes gh-30327

.gitignore

@@ -28,6 +28,7 @@ buildSrc/build
 /integration-tests/build
 /src/asciidoc/build
 target/
+/target/
 
 # Eclipse artifacts, including WTP generated manifests
 .classpath

.sdkmanrc

@@ -1,3 +1,3 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=8.0.352-librca
+java=8.0.362-librca

build.gradle

@@ -28,18 +28,18 @@ configure(allprojects) { project ->
 	dependencyManagement {
 		imports {
 			mavenBom "com.fasterxml.jackson:jackson-bom:2.12.7"
-			mavenBom "io.netty:netty-bom:4.1.86.Final"
-			mavenBom "io.projectreactor:reactor-bom:2020.0.27"
+			mavenBom "io.netty:netty-bom:4.1.91.Final"
+			mavenBom "io.projectreactor:reactor-bom:2020.0.31"
 			mavenBom "io.r2dbc:r2dbc-bom:Arabba-SR13"
 			mavenBom "io.rsocket:rsocket-bom:1.1.3"
-			mavenBom "org.eclipse.jetty:jetty-bom:9.4.50.v20221201"
+			mavenBom "org.eclipse.jetty:jetty-bom:9.4.51.v20230217"
 			mavenBom "org.jetbrains.kotlin:kotlin-bom:1.5.32"
 			mavenBom "org.jetbrains.kotlinx:kotlinx-coroutines-bom:1.5.2"
 			mavenBom "org.jetbrains.kotlinx:kotlinx-serialization-bom:1.2.2"
 			mavenBom "org.junit:junit-bom:5.8.2"
 		}
 		dependencies {
-			dependencySet(group: 'org.apache.logging.log4j', version: '2.19.0') {
+			dependencySet(group: 'org.apache.logging.log4j', version: '2.20.0') {
 				entry 'log4j-api'
 				entry 'log4j-core'
 				entry 'log4j-jul'
@@ -92,7 +92,7 @@ configure(allprojects) { project ->
 				entry 'jibx-run'
 			}
 			dependency "org.ogce:xpp3:1.1.6"
-			dependency "org.yaml:snakeyaml:1.30"
+			dependency "org.yaml:snakeyaml:1.33"
 
 			dependency "com.h2database:h2:2.1.214"
 			dependency "com.github.ben-manes.caffeine:caffeine:2.9.3"
@@ -128,18 +128,18 @@ configure(allprojects) { project ->
 			dependency "org.webjars:webjars-locator-core:0.48"
 			dependency "org.webjars:underscorejs:1.8.3"
 
-			dependencySet(group: 'org.apache.tomcat', version: '9.0.70') {
+			dependencySet(group: 'org.apache.tomcat', version: '9.0.73') {
 				entry 'tomcat-util'
 				entry('tomcat-websocket') {
 					exclude group: "org.apache.tomcat", name: "tomcat-servlet-api"
 					exclude group: "org.apache.tomcat", name: "tomcat-websocket-api"
 				}
 			}
-			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.70') {
+			dependencySet(group: 'org.apache.tomcat.embed', version: '9.0.73') {
 				entry 'tomcat-embed-core'
 				entry 'tomcat-embed-websocket'
 			}
-			dependencySet(group: 'io.undertow', version: '2.2.22.Final') {
+			dependencySet(group: 'io.undertow', version: '2.2.23.Final') {
 				entry 'undertow-core'
 				entry('undertow-servlet') {
 					exclude group: "org.jboss.spec.javax.servlet", name: "jboss-servlet-api_4.0_spec"
@@ -191,7 +191,7 @@ configure(allprojects) { project ->
 			dependency "org.junit.support:testng-engine:1.0.4"
 			dependency "org.hamcrest:hamcrest:2.2"
 			dependency "org.awaitility:awaitility:3.1.6"
-			dependency "org.assertj:assertj-core:3.24.1"
+			dependency "org.assertj:assertj-core:3.24.2"
 			dependencySet(group: 'org.xmlunit', version: '2.9.0') {
 				entry 'xmlunit-assertj'
 				entry('xmlunit-matchers') {
@@ -206,10 +206,10 @@ configure(allprojects) { project ->
 			}
 			dependency "io.mockk:mockk:1.12.1"
 
-			dependency("net.sourceforge.htmlunit:htmlunit:2.69.0") {
+			dependency("net.sourceforge.htmlunit:htmlunit:2.70.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
-			dependency("org.seleniumhq.selenium:htmlunit-driver:2.67.0") {
+			dependency("org.seleniumhq.selenium:htmlunit-driver:2.70.0") {
 				exclude group: "commons-logging", name: "commons-logging"
 			}
 			dependency("org.seleniumhq.selenium:selenium-java:3.141.59") {
@@ -340,7 +340,7 @@ configure([rootProject] + javaProjects) { project ->
 	}
 
 	checkstyle {
-		toolVersion = "10.6.0"
+		toolVersion = "10.9.3"
 		configDirectory.set(rootProject.file("src/checkstyle"))
 	}
 
@@ -377,9 +377,9 @@ configure([rootProject] + javaProjects) { project ->
 			"https://www.eclipse.org/aspectj/doc/released/aspectj5rt-api/",
 			"https://www.ehcache.org/apidocs/2.10.4/",
 			"https://www.quartz-scheduler.org/api/2.3.0/",
-			"https://fasterxml.github.io/jackson-core/javadoc/2.10/",
-			"https://fasterxml.github.io/jackson-databind/javadoc/2.10/",
-			"https://fasterxml.github.io/jackson-dataformat-xml/javadoc/2.10/",
+			"https://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-core/2.12.7/",
+			"https://www.javadoc.io/doc/com.fasterxml.jackson.core/jackson-databind/2.12.7/",
+			"https://www.javadoc.io/doc/com.fasterxml.jackson.dataformat/jackson-dataformat-xml/2.12.7/",
 			"https://hc.apache.org/httpcomponents-client-5.1.x/current/httpclient5/apidocs/",
 			"https://projectreactor.io/docs/test/release/api/",
 			"https://junit.org/junit4/javadoc/4.13.2/",

ci/parameters.yml

@@ -8,7 +8,4 @@ milestone: "5.3.x"
 build-name: "spring-framework"
 pipeline-name: "spring-framework"
 concourse-url: "https://ci.spring.io"
-registry-mirror-host: docker.repo.spring.io
-registry-mirror-username: ((artifactory-username))
-registry-mirror-password: ((artifactory-password))
 task-timeout: 1h00m

ci/pipeline.yml

@@ -23,11 +23,6 @@ anchors:
   docker-resource-source: &docker-resource-source
     username: ((docker-hub-username))
     password: ((docker-hub-password))
-    tag: ((milestone))
-  registry-mirror-vars: &registry-mirror-vars
-    registry-mirror-host: ((registry-mirror-host))
-    registry-mirror-username: ((registry-mirror-username))
-    registry-mirror-password: ((registry-mirror-password))
   slack-fail-params: &slack-fail-params
     text: >
       :concourse-failed: <https://ci.spring.io/teams/${BUILD_TEAM_NAME}/pipelines/${BUILD_PIPELINE_NAME}/jobs/${BUILD_JOB_NAME}/builds/${BUILD_NAME}|${BUILD_PIPELINE_NAME} ${BUILD_JOB_NAME} failed!>
@@ -48,31 +43,37 @@ resource_types:
 - name: registry-image
   type: registry-image
   source:
+    <<: *docker-resource-source
     repository: concourse/registry-image-resource
-    tag: 1.5.0
+    tag: 1.7.1
 - name: artifactory-resource
   type: registry-image
   source:
+    <<: *docker-resource-source
     repository: springio/artifactory-resource
-    tag: 0.0.17
+    tag: 0.0.18
 - name: github-release
   type: registry-image
   source:
+    <<: *docker-resource-source
     repository: concourse/github-release-resource
-    tag: 1.5.5
+    tag: 1.8.0
 - name: github-status-resource
   type: registry-image
   source:
+    <<: *docker-resource-source
     repository: dpb587/github-status-resource
     tag: master
 - name: pull-request
   type: registry-image
   source:
+    <<: *docker-resource-source
     repository: teliaoss/github-pr-resource
     tag: v0.23.0
 - name: slack-notification
   type: registry-image
   source:
+    <<: *docker-resource-source
     repository: cfcommunity/slack-notification-resource
     tag: latest
 resources:
@@ -101,6 +102,7 @@ resources:
   source:
     <<: *docker-resource-source
     repository: ((docker-hub-organization))/spring-framework-ci
+    tag: ((milestone))
 - name: artifactory-repo
   type: artifactory-resource
   icon: package-variant
@@ -168,7 +170,7 @@ jobs:
         image: ci-image
       vars:
         ci-image-name: ci-image
-        <<: *registry-mirror-vars
+        <<: *docker-resource-source
     - put: ci-image
       params:
         image: ci-image/image.tar

ci/tasks/build-ci-image.yml

@@ -4,11 +4,9 @@ image_resource:
   type: registry-image
   source:
     repository: concourse/oci-build-task
-    tag: 0.9.1
-    registry_mirror:
-      host: ((registry-mirror-host))
-      username: ((registry-mirror-username))
-      password: ((registry-mirror-password))
+    tag: 0.10.0
+    username: ((docker-hub-username))
+    password: ((docker-hub-password))
 inputs:
   - name: ci-images-git-repo
 outputs:

gradle.properties

@@ -1,4 +1,4 @@
-version=5.3.25-SNAPSHOT
+version=5.3.27
 org.gradle.jvmargs=-Xmx2048m
 org.gradle.caching=true
 org.gradle.parallel=true

settings.gradle

@@ -7,8 +7,8 @@ pluginManagement {
 }
 
 plugins {
-	id "com.gradle.enterprise" version "3.11.1"
-	id "io.spring.ge.conventions" version "0.0.11"
+	id "com.gradle.enterprise" version "3.12.1"
+	id "io.spring.ge.conventions" version "0.0.13"
 }
 
 include "spring-aop"

spring-aop/src/main/java/org/springframework/aop/aspectj/annotation/MetadataAwareAspectInstanceFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,10 +23,6 @@ import org.springframework.lang.Nullable;
  * Subinterface of {@link org.springframework.aop.aspectj.AspectInstanceFactory}
  * that returns {@link AspectMetadata} associated with AspectJ-annotated classes.
  *
- * <p>Ideally, AspectInstanceFactory would include this method itself, but because
- * AspectMetadata uses Java-5-only {@link org.aspectj.lang.reflect.AjType},
- * we need to split out this subinterface.
- *
  * @author Rod Johnson
  * @since 2.0
  * @see AspectMetadata
@@ -35,13 +31,13 @@ import org.springframework.lang.Nullable;
 public interface MetadataAwareAspectInstanceFactory extends AspectInstanceFactory {
 
 	/**
-	 * Return the AspectJ AspectMetadata for this factory's aspect.
+	 * Get the AspectJ AspectMetadata for this factory's aspect.
 	 * @return the aspect metadata
 	 */
 	AspectMetadata getAspectMetadata();
 
 	/**
-	 * Return the best possible creation mutex for this factory.
+	 * Get the best possible creation mutex for this factory.
 	 * @return the mutex object (may be {@code null} for no mutex to use)
 	 * @since 4.3
 	 */

spring-aop/src/main/java/org/springframework/aop/framework/JdkDynamicAopProxy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -123,6 +123,11 @@ final class JdkDynamicAopProxy implements AopProxy, InvocationHandler, Serializa
 		if (logger.isTraceEnabled()) {
 			logger.trace("Creating JDK dynamic proxy: " + this.advised.getTargetSource());
 		}
+		if (classLoader == null || classLoader.getParent() == null) {
+			// JDK bootstrap loader or platform loader suggested ->
+			// use higher-level loader which can see Spring infrastructure classes
+			classLoader = getClass().getClassLoader();
+		}
 		return Proxy.newProxyInstance(classLoader, this.proxiedInterfaces, this);
 	}
 

spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/target/package-info.java

@@ -0,0 +1,10 @@
+/**
+ * Various {@link org.springframework.aop.framework.autoproxy.TargetSourceCreator}
+ * implementations for use with Spring's AOP auto-proxying support.
+ */
+@NonNullApi
+@NonNullFields
+package org.springframework.aop.framework.autoproxy.target;
+
+import org.springframework.lang.NonNullApi;
+import org.springframework.lang.NonNullFields;

spring-aop/src/test/java/org/springframework/aop/framework/ProxyFactoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,10 @@
 
 package org.springframework.aop.framework;
 
+import java.sql.SQLException;
+import java.sql.Savepoint;
 import java.util.ArrayList;
+import java.util.Date;
 import java.util.List;
 
 import javax.accessibility.Accessible;
@@ -380,6 +383,40 @@ public class ProxyFactoryTests {
 		assertThat(proxy.getName()).isEqualTo("tb");
 	}
 
+	@Test
+	public void testCharSequenceProxy() {
+		CharSequence target = "test";
+		ProxyFactory pf = new ProxyFactory(target);
+		ClassLoader cl = target.getClass().getClassLoader();
+		assertThat(((CharSequence) pf.getProxy(cl)).toString()).isEqualTo(target);
+	}
+
+	@Test
+	public void testDateProxy() {
+		Date target = new Date();
+		ProxyFactory pf = new ProxyFactory(target);
+		pf.setProxyTargetClass(true);
+		ClassLoader cl = target.getClass().getClassLoader();
+		assertThat(((Date) pf.getProxy(cl)).getTime()).isEqualTo(target.getTime());
+	}
+
+	@Test
+	public void testJdbcSavepointProxy() throws SQLException {
+		Savepoint target = new Savepoint() {
+			@Override
+			public int getSavepointId() throws SQLException {
+				return 1;
+			}
+			@Override
+			public String getSavepointName() throws SQLException {
+				return "sp";
+			}
+		};
+		ProxyFactory pf = new ProxyFactory(target);
+		ClassLoader cl = Savepoint.class.getClassLoader();
+		assertThat(((Savepoint) pf.getProxy(cl)).getSavepointName()).isEqualTo("sp");
+	}
+
 
 	@Order(2)
 	public static class A implements Runnable {
@@ -391,7 +428,7 @@ public class ProxyFactoryTests {
 
 
 	@Order(1)
-	public static class B implements Runnable{
+	public static class B implements Runnable {
 
 		@Override
 		public void run() {

spring-beans/src/main/java/org/springframework/beans/BeanUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -247,7 +247,8 @@ public abstract class BeanUtils {
 			// A single public constructor
 			return (Constructor<T>) ctors[0];
 		}
-		else if (ctors.length == 0){
+		else if (ctors.length == 0) {
+			// No public constructors -> check non-public
 			ctors = clazz.getDeclaredConstructors();
 			if (ctors.length == 1) {
 				// A single non-public constructor, e.g. from a non-public record type

spring-beans/src/main/java/org/springframework/beans/factory/annotation/QualifierAnnotationAutowireCandidateResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import java.util.Set;
 
 import org.springframework.beans.SimpleTypeConverter;
 import org.springframework.beans.TypeConverter;
+import org.springframework.beans.factory.BeanFactory;
 import org.springframework.beans.factory.NoSuchBeanDefinitionException;
 import org.springframework.beans.factory.config.BeanDefinitionHolder;
 import org.springframework.beans.factory.config.DependencyDescriptor;
@@ -240,10 +241,11 @@ public class QualifierAnnotationAutowireCandidateResolver extends GenericTypeAwa
 				}
 			}
 			if (targetAnnotation == null) {
+				BeanFactory beanFactory = getBeanFactory();
 				// Look for matching annotation on the target class
-				if (getBeanFactory() != null) {
+				if (beanFactory != null) {
 					try {
-						Class<?> beanType = getBeanFactory().getType(bdHolder.getBeanName());
+						Class<?> beanType = beanFactory.getType(bdHolder.getBeanName());
 						if (beanType != null) {
 							targetAnnotation = AnnotationUtils.getAnnotation(ClassUtils.getUserClass(beanType), type);
 						}

spring-beans/src/main/java/org/springframework/beans/factory/config/YamlProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -184,8 +184,9 @@ public abstract class YamlProcessor {
 	protected Yaml createYaml() {
 		LoaderOptions loaderOptions = new LoaderOptions();
 		loaderOptions.setAllowDuplicateKeys(false);
-		return new Yaml(new FilteringConstructor(loaderOptions), new Representer(),
-				new DumperOptions(), loaderOptions);
+		DumperOptions dumperOptions = new DumperOptions();
+		return new Yaml(new FilteringConstructor(loaderOptions), new Representer(dumperOptions),
+				dumperOptions, loaderOptions);
 	}
 
 	private boolean process(MatchCallback callback, Yaml yaml, Resource resource) {

spring-beans/src/main/java/org/springframework/beans/factory/support/DisposableBeanAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -214,12 +214,15 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 				}
 			}
 			catch (Throwable ex) {
-				String msg = "Invocation of destroy method failed on bean with name '" + this.beanName + "'";
-				if (logger.isDebugEnabled()) {
-					logger.warn(msg, ex);
-				}
-				else {
-					logger.warn(msg + ": " + ex);
+				if (logger.isWarnEnabled()) {
+					String msg = "Invocation of destroy method failed on bean with name '" + this.beanName + "'";
+					if (logger.isDebugEnabled()) {
+						// Log at warn level like below but add the exception stacktrace only with debug level
+						logger.warn(msg, ex);
+					}
+					else {
+						logger.warn(msg + ": " + ex);
+					}
 				}
 			}
 		}
@@ -240,12 +243,15 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 				}
 			}
 			catch (Throwable ex) {
-				String msg = "Invocation of close method failed on bean with name '" + this.beanName + "'";
-				if (logger.isDebugEnabled()) {
-					logger.warn(msg, ex);
-				}
-				else {
-					logger.warn(msg + ": " + ex);
+				if (logger.isWarnEnabled()) {
+					String msg = "Invocation of close method failed on bean with name '" + this.beanName + "'";
+					if (logger.isDebugEnabled()) {
+						// Log at warn level like below but add the exception stacktrace only with debug level
+						logger.warn(msg, ex);
+					}
+					else {
+						logger.warn(msg + ": " + ex);
+					}
 				}
 			}
 		}
@@ -320,18 +326,23 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 			}
 		}
 		catch (InvocationTargetException ex) {
-			String msg = "Custom destroy method '" + this.destroyMethodName + "' on bean with name '" +
-					this.beanName + "' threw an exception";
-			if (logger.isDebugEnabled()) {
-				logger.warn(msg, ex.getTargetException());
-			}
-			else {
-				logger.warn(msg + ": " + ex.getTargetException());
+			if (logger.isWarnEnabled()) {
+				String msg = "Custom destroy method '" + this.destroyMethodName + "' on bean with name '" +
+						this.beanName + "' threw an exception";
+				if (logger.isDebugEnabled()) {
+					// Log at warn level like below but add the exception stacktrace only with debug level
+					logger.warn(msg, ex.getTargetException());
+				}
+				else {
+					logger.warn(msg + ": " + ex.getTargetException());
+				}
 			}
 		}
 		catch (Throwable ex) {
-			logger.warn("Failed to invoke custom destroy method '" + this.destroyMethodName +
-					"' on bean with name '" + this.beanName + "'", ex);
+			if (logger.isWarnEnabled()) {
+				logger.warn("Failed to invoke custom destroy method '" + this.destroyMethodName +
+						"' on bean with name '" + this.beanName + "'", ex);
+			}
 		}
 	}
 

spring-beans/src/main/java/org/springframework/beans/factory/xml/XmlBeanDefinitionReader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -547,7 +547,8 @@ public class XmlBeanDefinitionReader extends AbstractBeanDefinitionReader {
 	 * @see DefaultNamespaceHandlerResolver#DefaultNamespaceHandlerResolver(ClassLoader)
 	 */
 	protected NamespaceHandlerResolver createDefaultNamespaceHandlerResolver() {
-		ClassLoader cl = (getResourceLoader() != null ? getResourceLoader().getClassLoader() : getBeanClassLoader());
+		ResourceLoader resourceLoader = getResourceLoader();
+		ClassLoader cl = (resourceLoader != null ? resourceLoader.getClassLoader() : getBeanClassLoader());
 		return new DefaultNamespaceHandlerResolver(cl);
 	}
 

spring-beans/src/test/java/org/springframework/beans/BeanWrapperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -395,6 +395,7 @@ class BeanWrapperTests extends AbstractPropertyAccessorTests {
 	}
 
 
+	@SuppressWarnings("try")
 	public static class ActiveResource implements AutoCloseable {
 
 		public ActiveResource getResource() {

spring-beans/src/test/java/org/springframework/beans/factory/DefaultListableBeanFactoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -436,7 +436,6 @@ class DefaultListableBeanFactoryTests {
 
 	@Test
 	void empty() {
-		ListableBeanFactory lbf = new DefaultListableBeanFactory();
 		assertThat(lbf.getBeanDefinitionNames() != null).as("No beans defined --> array != null").isTrue();
 		assertThat(lbf.getBeanDefinitionNames().length == 0).as("No beans defined after no arg constructor").isTrue();
 		assertThat(lbf.getBeanDefinitionCount() == 0).as("No beans defined after no arg constructor").isTrue();
@@ -778,21 +777,6 @@ class DefaultListableBeanFactoryTests {
 		assertThat(factory.getType("child")).isEqualTo(DerivedTestBean.class);
 	}
 
-	@Test
-	void nameAlreadyBound() {
-		Properties p = new Properties();
-		p.setProperty("kerry.(class)", TestBean.class.getName());
-		p.setProperty("kerry.age", "35");
-		registerBeanDefinitions(p);
-		try {
-			registerBeanDefinitions(p);
-		}
-		catch (BeanDefinitionStoreException ex) {
-			assertThat(ex.getBeanName()).isEqualTo("kerry");
-			// expected
-		}
-	}
-
 	private void singleTestBean(ListableBeanFactory lbf) {
 		assertThat(lbf.getBeanDefinitionCount() == 1).as("1 beans defined").isTrue();
 		String[] names = lbf.getBeanDefinitionNames();

spring-context-support/src/main/java/org/springframework/cache/caffeine/CaffeineCacheManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,6 +51,7 @@ import org.springframework.util.ObjectUtils;
  * @author Juergen Hoeller
  * @author Stephane Nicoll
  * @author Sam Brannen
+ * @author Brian Clozel
  * @since 4.3
  * @see CaffeineCache
  */
@@ -188,8 +189,13 @@ public class CaffeineCacheManager implements CacheManager {
 	@Override
 	@Nullable
 	public Cache getCache(String name) {
-		return this.cacheMap.computeIfAbsent(name, cacheName ->
-				this.dynamic ? createCaffeineCache(cacheName) : null);
+		if (this.dynamic) {
+			Cache cache = this.cacheMap.get(name);
+			return (cache != null) ? cache : this.cacheMap.computeIfAbsent(name, this::createCaffeineCache);
+		}
+		else {
+			return this.cacheMap.get(name);
+		}
 	}
 
 

spring-context-support/src/main/java/org/springframework/mail/javamail/JavaMailSenderImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -132,10 +132,10 @@ public class JavaMailSenderImpl implements JavaMailSender {
 	}
 
 	/**
-	 * Allow {code Map} access to the JavaMail properties of this sender,
+	 * Allow {@code Map} access to the JavaMail properties of this sender,
 	 * with the option to add or override specific entries.
 	 * <p>Useful for specifying entries directly, for example via
-	 * {code javaMailProperties[mail.smtp.auth]}.
+	 * {@code javaMailProperties[mail.smtp.auth]}.
 	 */
 	public Properties getJavaMailProperties() {
 		return this.javaMailProperties;

spring-context/src/main/java/org/springframework/context/support/AbstractApplicationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -729,9 +729,11 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 
 	/**
 	 * Modify the application context's internal bean factory after its standard
-	 * initialization. All bean definitions will have been loaded, but no beans
-	 * will have been instantiated yet. This allows for registering special
-	 * BeanPostProcessors etc in certain ApplicationContext implementations.
+	 * initialization. The initial definition resources will have been loaded but no
+	 * post-processors will have run and no derived bean definitions will have been
+	 * registered, and most importantly, no beans will have been instantiated yet.
+	 * <p>This template method allows for registering special BeanPostProcessors
+	 * etc in certain AbstractApplicationContext subclasses.
 	 * @param beanFactory the bean factory used by the application context
 	 */
 	protected void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) {

spring-context/src/main/java/org/springframework/validation/FieldError.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -125,7 +125,7 @@ public class FieldError extends ObjectError {
 	@Override
 	public String toString() {
 		return "Field error in object '" + getObjectName() + "' on field '" + this.field +
-				"': rejected value [" + ObjectUtils.nullSafeToString(this.rejectedValue) + "]; " +
+				"': rejected value [" + ObjectUtils.nullSafeConciseToString(this.rejectedValue) + "]; " +
 				resolvableToString();
 	}
 

spring-context/src/test/java/org/springframework/format/datetime/DateFormattingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -133,7 +133,7 @@ public class DateFormattingTests {
 		assertThat(exception)
 			.hasMessageContaining("for property 'styleDate'")
 			.hasCauseInstanceOf(ConversionFailedException.class).cause()
-				.hasMessageContaining("for value '99/01/01'")
+				.hasMessageContaining("for value [99/01/01]")
 				.hasCauseInstanceOf(IllegalArgumentException.class).cause()
 					.hasMessageContaining("Parse attempt failed for value [99/01/01]")
 					.hasCauseInstanceOf(ParseException.class).cause()
@@ -353,7 +353,7 @@ public class DateFormattingTests {
 			assertThat(fieldError.unwrap(TypeMismatchException.class))
 				.hasMessageContaining("for property 'patternDateWithFallbackPatterns'")
 				.hasCauseInstanceOf(ConversionFailedException.class).cause()
-					.hasMessageContaining("for value '210302'")
+					.hasMessageContaining("for value [210302]")
 					.hasCauseInstanceOf(IllegalArgumentException.class).cause()
 						.hasMessageContaining("Parse attempt failed for value [210302]")
 						.hasCauseInstanceOf(ParseException.class).cause()

spring-context/src/test/java/org/springframework/format/datetime/standard/DateTimeFormattingTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -333,7 +333,7 @@ class DateTimeFormattingTests {
 		assertThat(fieldError.unwrap(TypeMismatchException.class))
 			.hasMessageContaining("for property 'isoLocalDate'")
 			.hasCauseInstanceOf(ConversionFailedException.class).cause()
-				.hasMessageContaining("for value '2009-31-10'")
+				.hasMessageContaining("for value [2009-31-10]")
 				.hasCauseInstanceOf(IllegalArgumentException.class).cause()
 					.hasMessageContaining("Parse attempt failed for value [2009-31-10]")
 					.hasCauseInstanceOf(DateTimeParseException.class).cause()
@@ -540,7 +540,7 @@ class DateTimeFormattingTests {
 			assertThat(fieldError.unwrap(TypeMismatchException.class))
 				.hasMessageContaining("for property 'patternLocalDateWithFallbackPatterns'")
 				.hasCauseInstanceOf(ConversionFailedException.class).cause()
-					.hasMessageContaining("for value '210302'")
+					.hasMessageContaining("for value [210302]")
 					.hasCauseInstanceOf(IllegalArgumentException.class).cause()
 						.hasMessageContaining("Parse attempt failed for value [210302]")
 						.hasCauseInstanceOf(DateTimeParseException.class).cause()

spring-core/src/main/java/org/springframework/asm/AnnotationVisitor.java

@@ -82,6 +82,17 @@ public abstract class AnnotationVisitor {
     this.av = annotationVisitor;
   }
 
+  /**
+   * The annotation visitor to which this visitor must delegate method calls. May be {@literal
+   * null}.
+   *
+   * @return the annotation visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
+   */
+  public AnnotationVisitor getDelegate() {
+    return av;
+  }
+
   /**
    * Visits a primitive value of the annotation.
    *

spring-core/src/main/java/org/springframework/asm/ClassReader.java

@@ -194,7 +194,7 @@ public class ClassReader {
     this.b = classFileBuffer;
     // Check the class' major_version. This field is after the magic and minor_version fields, which
     // use 4 and 2 bytes respectively.
-    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V19) {
+    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V21) {
       throw new IllegalArgumentException(
           "Unsupported class file major version " + readShort(classFileOffset + 6));
     }
@@ -308,6 +308,7 @@ public class ClassReader {
    * @return the content of the given input stream.
    * @throws IOException if a problem occurs during reading.
    */
+  @SuppressWarnings("PMD.UseTryWithResources")
   private static byte[] readStream(final InputStream inputStream, final boolean close)
       throws IOException {
     if (inputStream == null) {
@@ -376,7 +377,7 @@ public class ClassReader {
   }
 
   /**
-   * Returns the internal of name of the super class (see {@link Type#getInternalName()}). For
+   * Returns the internal name of the super class (see {@link Type#getInternalName()}). For
    * interfaces, the super class is {@link Object}.
    *
    * @return the internal name of the super class, or {@literal null} for {@link Object} class.

spring-core/src/main/java/org/springframework/asm/ClassTooLargeException.java

@@ -42,7 +42,8 @@ public final class ClassTooLargeException extends IndexOutOfBoundsException {
   /**
    * Constructs a new {@link ClassTooLargeException}.
    *
-   * @param className the internal name of the class.
+   * @param className the internal name of the class (see {@link
+   *     org.objectweb.asm.Type#getInternalName()}).
    * @param constantPoolCount the number of constant pool items of the class.
    */
   public ClassTooLargeException(final String className, final int constantPoolCount) {
@@ -52,7 +53,7 @@ public final class ClassTooLargeException extends IndexOutOfBoundsException {
   }
 
   /**
-   * Returns the internal name of the class.
+   * Returns the internal name of the class (see {@link org.objectweb.asm.Type#getInternalName()}).
    *
    * @return the internal name of the class.
    */

spring-core/src/main/java/org/springframework/asm/ClassVisitor.java

@@ -81,6 +81,15 @@ public abstract class ClassVisitor {
     this.cv = classVisitor;
   }
 
+  /**
+   * The class visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the class visitor to which this visitor must delegate method calls, or {@literal null}.
+   */
+  public ClassVisitor getDelegate() {
+    return cv;
+  }
+
   /**
    * Visits the header of the class.
    *
@@ -155,7 +164,8 @@ public abstract class ClassVisitor {
    * implicitly its own nest, so it's invalid to call this method with the visited class name as
    * argument.
    *
-   * @param nestHost the internal name of the host class of the nest.
+   * @param nestHost the internal name of the host class of the nest (see {@link
+   *     Type#getInternalName()}).
    */
   public void visitNestHost(final String nestHost) {
     if (api < Opcodes.ASM7) {
@@ -167,14 +177,19 @@ public abstract class ClassVisitor {
   }
 
   /**
-   * Visits the enclosing class of the class. This method must be called only if the class has an
-   * enclosing class.
+   * Visits the enclosing class of the class. This method must be called only if this class is a
+   * local or anonymous class. See the JVMS 4.7.7 section for more details.
    *
-   * @param owner internal name of the enclosing class of the class.
+   * @param owner internal name of the enclosing class of the class (see {@link
+   *     Type#getInternalName()}).
    * @param name the name of the method that contains the class, or {@literal null} if the class is
-   *     not enclosed in a method of its enclosing class.
+   *     not enclosed in a method or constructor of its enclosing class (e.g. if it is enclosed in
+   *     an instance initializer, static initializer, instance variable initializer, or class
+   *     variable initializer).
    * @param descriptor the descriptor of the method that contains the class, or {@literal null} if
-   *     the class is not enclosed in a method of its enclosing class.
+   *     the class is not enclosed in a method or constructor of its enclosing class (e.g. if it is
+   *     enclosed in an instance initializer, static initializer, instance variable initializer, or
+   *     class variable initializer).
    */
   public void visitOuterClass(final String owner, final String name, final String descriptor) {
     if (cv != null) {
@@ -241,7 +256,7 @@ public abstract class ClassVisitor {
    * the visited class is the host of a nest. A nest host is implicitly a member of its own nest, so
    * it's invalid to call this method with the visited class name as argument.
    *
-   * @param nestMember the internal name of a nest member.
+   * @param nestMember the internal name of a nest member (see {@link Type#getInternalName()}).
    */
   public void visitNestMember(final String nestMember) {
     if (api < Opcodes.ASM7) {
@@ -256,7 +271,8 @@ public abstract class ClassVisitor {
    * Visits a permitted subclasses. A permitted subclass is one of the allowed subclasses of the
    * current class.
    *
-   * @param permittedSubclass the internal name of a permitted subclass.
+   * @param permittedSubclass the internal name of a permitted subclass (see {@link
+   *     Type#getInternalName()}).
    */
   public void visitPermittedSubclass(final String permittedSubclass) {
     if (api < Opcodes.ASM9) {
@@ -269,15 +285,18 @@ public abstract class ClassVisitor {
 
   /**
    * Visits information about an inner class. This inner class is not necessarily a member of the
-   * class being visited.
+   * class being visited. More precisely, every class or interface C which is referenced by this
+   * class and which is not a package member must be visited with this method. This class must
+   * reference its nested class or interface members, and its enclosing class, if any. See the JVMS
+   * 4.7.6 section for more details.
    *
-   * @param name the internal name of an inner class (see {@link Type#getInternalName()}).
-   * @param outerName the internal name of the class to which the inner class belongs (see {@link
-   *     Type#getInternalName()}). May be {@literal null} for not member classes.
-   * @param innerName the (simple) name of the inner class inside its enclosing class. May be
-   *     {@literal null} for anonymous inner classes.
-   * @param access the access flags of the inner class as originally declared in the enclosing
-   *     class.
+   * @param name the internal name of C (see {@link Type#getInternalName()}).
+   * @param outerName the internal name of the class or interface C is a member of (see {@link
+   *     Type#getInternalName()}). Must be {@literal null} if C is not the member of a class or
+   *     interface (e.g. for local or anonymous classes).
+   * @param innerName the (simple) name of C. Must be {@literal null} for anonymous inner classes.
+   * @param access the access flags of C originally declared in the source code from which this
+   *     class was compiled.
    */
   public void visitInnerClass(
       final String name, final String outerName, final String innerName, final int access) {

spring-core/src/main/java/org/springframework/asm/ClassWriter.java

@@ -842,7 +842,7 @@ public class ClassWriter extends ClassVisitor {
    * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
    * sub classes, and is normally not needed by class generators or adapters.</i>
    *
-   * @param value the internal name of the class.
+   * @param value the internal name of the class (see {@link Type#getInternalName()}).
    * @return the index of a new or already existing class reference item.
    */
   public int newClass(final String value) {
@@ -894,7 +894,8 @@ public class ClassWriter extends ClassVisitor {
    *     Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
    *     Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
    *     {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
-   * @param owner the internal name of the field or method owner class.
+   * @param owner the internal name of the field or method owner class (see {@link
+   *     Type#getInternalName()}).
    * @param name the name of the field or method.
    * @param descriptor the descriptor of the field or method.
    * @return the index of a new or already existing method type reference item.
@@ -916,7 +917,8 @@ public class ClassWriter extends ClassVisitor {
    *     Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
    *     Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
    *     {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
-   * @param owner the internal name of the field or method owner class.
+   * @param owner the internal name of the field or method owner class (see {@link
+   *     Type#getInternalName()}).
    * @param name the name of the field or method.
    * @param descriptor the descriptor of the field or method.
    * @param isInterface true if the owner is an interface.
@@ -978,7 +980,7 @@ public class ClassWriter extends ClassVisitor {
    * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
    * sub classes, and is normally not needed by class generators or adapters.</i>
    *
-   * @param owner the internal name of the field's owner class.
+   * @param owner the internal name of the field's owner class (see {@link Type#getInternalName()}).
    * @param name the field's name.
    * @param descriptor the field's descriptor.
    * @return the index of a new or already existing field reference item.
@@ -992,7 +994,8 @@ public class ClassWriter extends ClassVisitor {
    * constant pool already contains a similar item. <i>This method is intended for {@link Attribute}
    * sub classes, and is normally not needed by class generators or adapters.</i>
    *
-   * @param owner the internal name of the method's owner class.
+   * @param owner the internal name of the method's owner class (see {@link
+   *     Type#getInternalName()}).
    * @param name the method's name.
    * @param descriptor the method's descriptor.
    * @param isInterface {@literal true} if {@code owner} is an interface.
@@ -1028,9 +1031,10 @@ public class ClassWriter extends ClassVisitor {
    * currently being generated by this ClassWriter, which can of course not be loaded since it is
    * under construction.
    *
-   * @param type1 the internal name of a class.
-   * @param type2 the internal name of another class.
-   * @return the internal name of the common super class of the two given classes.
+   * @param type1 the internal name of a class (see {@link Type#getInternalName()}).
+   * @param type2 the internal name of another class (see {@link Type#getInternalName()}).
+   * @return the internal name of the common super class of the two given classes (see {@link
+   *     Type#getInternalName()}).
    */
   protected String getCommonSuperClass(final String type1, final String type2) {
     ClassLoader classLoader = getClassLoader();

spring-core/src/main/java/org/springframework/asm/FieldVisitor.java

@@ -78,6 +78,15 @@ public abstract class FieldVisitor {
     this.fv = fieldVisitor;
   }
 
+  /**
+   * The field visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the field visitor to which this visitor must delegate method calls, or {@literal null}.
+   */
+  public FieldVisitor getDelegate() {
+    return fv;
+  }
+
   /**
    * Visits an annotation of the field.
    *

spring-core/src/main/java/org/springframework/asm/Frame.java

@@ -367,11 +367,12 @@ class Frame {
             typeValue = REFERENCE_KIND | symbolTable.addType(internalName);
             break;
           default:
-            throw new IllegalArgumentException();
+            throw new IllegalArgumentException(
+                "Invalid descriptor fragment: " + buffer.substring(elementDescriptorOffset));
         }
         return ((elementDescriptorOffset - offset) << DIM_SHIFT) | typeValue;
       default:
-        throw new IllegalArgumentException();
+        throw new IllegalArgumentException("Invalid descriptor: " + buffer.substring(offset));
     }
   }
 

spring-core/src/main/java/org/springframework/asm/Handle.java

@@ -65,7 +65,7 @@ public final class Handle {
    *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
    *     Opcodes#H_INVOKEINTERFACE}.
    * @param owner the internal name of the class that owns the field or method designated by this
-   *     handle.
+   *     handle (see {@link Type#getInternalName()}).
    * @param name the name of the field or method designated by this handle.
    * @param descriptor the descriptor of the field or method designated by this handle.
    * @deprecated this constructor has been superseded by {@link #Handle(int, String, String, String,
@@ -85,7 +85,7 @@ public final class Handle {
    *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
    *     Opcodes#H_INVOKEINTERFACE}.
    * @param owner the internal name of the class that owns the field or method designated by this
-   *     handle.
+   *     handle (see {@link Type#getInternalName()}).
    * @param name the name of the field or method designated by this handle.
    * @param descriptor the descriptor of the field or method designated by this handle.
    * @param isInterface whether the owner is an interface or not.
@@ -118,7 +118,8 @@ public final class Handle {
   /**
    * Returns the internal name of the class that owns the field or method designated by this handle.
    *
-   * @return the internal name of the class that owns the field or method designated by this handle.
+   * @return the internal name of the class that owns the field or method designated by this handle
+   *     (see {@link Type#getInternalName()}).
    */
   public String getOwner() {
     return owner;

spring-core/src/main/java/org/springframework/asm/MethodTooLargeException.java

@@ -44,7 +44,7 @@ public final class MethodTooLargeException extends IndexOutOfBoundsException {
   /**
    * Constructs a new {@link MethodTooLargeException}.
    *
-   * @param className the internal name of the owner class.
+   * @param className the internal name of the owner class (see {@link Type#getInternalName()}).
    * @param methodName the name of the method.
    * @param descriptor the descriptor of the method.
    * @param codeSize the size of the method's Code attribute, in bytes.
@@ -64,7 +64,7 @@ public final class MethodTooLargeException extends IndexOutOfBoundsException {
   /**
    * Returns the internal name of the owner class.
    *
-   * @return the internal name of the owner class.
+   * @return the internal name of the owner class (see {@link Type#getInternalName()}).
    */
   public String getClassName() {
     return className;

spring-core/src/main/java/org/springframework/asm/MethodVisitor.java

@@ -94,6 +94,16 @@ public abstract class MethodVisitor {
     this.mv = methodVisitor;
   }
 
+  /**
+   * The method visitor to which this visitor must delegate method calls. May be {@literal null}.
+   *
+   * @return the method visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
+   */
+  public MethodVisitor getDelegate() {
+    return mv;
+  }
+
   // -----------------------------------------------------------------------------------------------
   // Parameters, annotations and non standard attributes
   // -----------------------------------------------------------------------------------------------
@@ -120,7 +130,7 @@ public abstract class MethodVisitor {
    * @return a visitor to the visit the actual default value of this annotation interface method, or
    *     {@literal null} if this visitor is not interested in visiting this default value. The
    *     'name' parameters passed to the methods of this annotation visitor are ignored. Moreover,
-   *     exacly one visit method must be called on this annotation visitor, followed by visitEnd.
+   *     exactly one visit method must be called on this annotation visitor, followed by visitEnd.
    */
   public AnnotationVisitor visitAnnotationDefault() {
     if (mv != null) {
@@ -273,15 +283,17 @@ public abstract class MethodVisitor {
    * @param type the type of this stack map frame. Must be {@link Opcodes#F_NEW} for expanded
    *     frames, or {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link
    *     Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
-   * @param numLocal the number of local variables in the visited frame.
+   * @param numLocal the number of local variables in the visited frame. Long and double values
+   *     count for one variable.
    * @param local the local variable types in this frame. This array must not be modified. Primitive
    *     types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
    *     Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or
    *     {@link Opcodes#UNINITIALIZED_THIS} (long and double are represented by a single element).
-   *     Reference types are represented by String objects (representing internal names), and
-   *     uninitialized types by Label objects (this label designates the NEW instruction that
-   *     created this uninitialized value).
-   * @param numStack the number of operand stack elements in the visited frame.
+   *     Reference types are represented by String objects (representing internal names, see {@link
+   *     Type#getInternalName()}), and uninitialized types by Label objects (this label designates
+   *     the NEW instruction that created this uninitialized value).
+   * @param numStack the number of operand stack elements in the visited frame. Long and double
+   *     values count for one stack element.
    * @param stack the operand stack types in this frame. This array must not be modified. Its
    *     content has the same format as the "local" array.
    * @throws IllegalStateException if a frame is visited just after another one, without any
@@ -360,7 +372,7 @@ public abstract class MethodVisitor {
 
   /**
    * Visits a type instruction. A type instruction is an instruction that takes the internal name of
-   * a class as parameter.
+   * a class as parameter (see {@link Type#getInternalName()}).
    *
    * @param opcode the opcode of the type instruction to be visited. This opcode is either NEW,
    *     ANEWARRAY, CHECKCAST or INSTANCEOF.
@@ -552,12 +564,12 @@ public abstract class MethodVisitor {
   /**
    * Visits an IINC instruction.
    *
-   * @param var index of the local variable to be incremented.
+   * @param varIndex index of the local variable to be incremented.
    * @param increment amount to increment the local variable by.
    */
-  public void visitIincInsn(final int var, final int increment) {
+  public void visitIincInsn(final int varIndex, final int increment) {
     if (mv != null) {
-      mv.visitIincInsn(var, increment);
+      mv.visitIincInsn(varIndex, increment);
     }
   }
 
@@ -643,8 +655,9 @@ public abstract class MethodVisitor {
    * @param start the beginning of the exception handler's scope (inclusive).
    * @param end the end of the exception handler's scope (exclusive).
    * @param handler the beginning of the exception handler's code.
-   * @param type the internal name of the type of exceptions handled by the handler, or {@literal
-   *     null} to catch any exceptions (for "finally" blocks).
+   * @param type the internal name of the type of exceptions handled by the handler (see {@link
+   *     Type#getInternalName()}), or {@literal null} to catch any exceptions (for "finally"
+   *     blocks).
    * @throws IllegalArgumentException if one of the labels has already been visited by this visitor
    *     (by the {@link #visitLabel} method).
    */

spring-core/src/main/java/org/springframework/asm/Opcodes.java

@@ -284,6 +284,8 @@ public interface Opcodes {
   int V17 = 0 << 16 | 61;
   int V18 = 0 << 16 | 62;
   int V19 = 0 << 16 | 63;
+  int V20 = 0 << 16 | 64;
+  int V21 = 0 << 16 | 65;
 
   /**
    * Version flag indicating that the class is using 'preview' features.

spring-core/src/main/java/org/springframework/asm/RecordComponentVisitor.java

@@ -45,7 +45,7 @@ public abstract class RecordComponentVisitor {
   /**
    * The record visitor to which this visitor must delegate method calls. May be {@literal null}.
    */
-  /*package-private*/ RecordComponentVisitor delegate;
+  protected RecordComponentVisitor delegate;
 
   /**
    * Constructs a new {@link RecordComponentVisitor}.
@@ -83,7 +83,8 @@ public abstract class RecordComponentVisitor {
   /**
    * The record visitor to which this visitor must delegate method calls. May be {@literal null}.
    *
-   * @return the record visitor to which this visitor must delegate method calls or {@literal null}.
+   * @return the record visitor to which this visitor must delegate method calls, or {@literal
+   *     null}.
    */
   public RecordComponentVisitor getDelegate() {
     return delegate;

spring-core/src/main/java/org/springframework/asm/RecordComponentWriter.java

@@ -37,7 +37,7 @@ final class RecordComponentWriter extends RecordComponentVisitor {
   /** The name_index field of the Record attribute. */
   private final int nameIndex;
 
-  /** The descriptor_index field of the the Record attribute. */
+  /** The descriptor_index field of the Record attribute. */
   private final int descriptorIndex;
 
   /**

spring-core/src/main/java/org/springframework/asm/Type.java

@@ -245,7 +245,7 @@ public final class Type {
   /**
    * Returns the {@link Type} corresponding to the given internal name.
    *
-   * @param internalName an internal name.
+   * @param internalName an internal name (see {@link Type#getInternalName()}).
    * @return the {@link Type} corresponding to the given internal name.
    */
   public static Type getObjectType(final String internalName) {
@@ -708,8 +708,8 @@ public final class Type {
    *
    * @return the size of the arguments of the method (plus one for the implicit this argument),
    *     argumentsSize, and the size of its return value, returnSize, packed into a single int i =
-   *     {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
-   *     i >> 2}, and returnSize to {@code i & 0x03}).
+   *     {@code (argumentsSize &lt;&lt; 2) | returnSize} (argumentsSize is therefore equal to {@code
+   *     i &gt;&gt; 2}, and returnSize to {@code i &amp; 0x03}).
    */
   public int getArgumentsAndReturnSizes() {
     return getArgumentsAndReturnSizes(getDescriptor());
@@ -721,8 +721,8 @@ public final class Type {
    * @param methodDescriptor a method descriptor.
    * @return the size of the arguments of the method (plus one for the implicit this argument),
    *     argumentsSize, and the size of its return value, returnSize, packed into a single int i =
-   *     {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
-   *     i >> 2}, and returnSize to {@code i & 0x03}).
+   *     {@code (argumentsSize &lt;&lt; 2) | returnSize} (argumentsSize is therefore equal to {@code
+   *     i &gt;&gt; 2}, and returnSize to {@code i &amp; 0x03}).
    */
   public static int getArgumentsAndReturnSizes(final String methodDescriptor) {
     int argumentsSize = 1;

spring-core/src/main/java/org/springframework/core/convert/ConversionFailedException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ public class ConversionFailedException extends ConversionException {
 			@Nullable Object value, Throwable cause) {
 
 		super("Failed to convert from type [" + sourceType + "] to type [" + targetType +
-				"] for value '" + ObjectUtils.nullSafeToString(value) + "'", cause);
+				"] for value [" + ObjectUtils.nullSafeConciseToString(value) + "]", cause);
 		this.sourceType = sourceType;
 		this.targetType = targetType;
 		this.value = value;

spring-core/src/main/java/org/springframework/core/log/LogFormatUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@ import org.apache.commons.logging.Log;
 
 import org.springframework.lang.Nullable;
 import org.springframework.util.ObjectUtils;
+import org.springframework.util.StringUtils;
 
 /**
  * Utility methods for formatting and logging messages.
@@ -78,7 +79,7 @@ public abstract class LogFormatUtils {
 			result = ObjectUtils.nullSafeToString(ex);
 		}
 		if (maxLength != -1) {
-			result = (result.length() > maxLength ? result.substring(0, maxLength) + " (truncated)..." : result);
+			result = StringUtils.truncate(result, maxLength);
 		}
 		if (replaceNewlinesAndControlCharacters) {
 			result = NEWLINE_PATTERN.matcher(result).replaceAll("<EOL>");

spring-core/src/main/java/org/springframework/core/log/LogMessage.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,12 +22,13 @@ import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
 /**
- * A simple log message type for use with Commons Logging, allowing
- * for convenient lazy resolution of a given {@link Supplier} instance
- * (typically bound to a Java 8 lambda expression) or a printf-style
- * format string ({@link String#format}) in its {@link #toString()}.
+ * A simple log message type for use with Commons Logging, allowing for convenient
+ * lazy resolution of a given {@link Supplier} instance (typically bound to a lambda
+ * expression) or a printf-style format string ({@link String#format}) in its
+ * {@link #toString()}.
  *
  * @author Juergen Hoeller
+ * @author Sebastien Deleuze
  * @since 5.2
  * @see #of(Supplier)
  * @see #format(String, Object)
@@ -77,7 +78,7 @@ public abstract class LogMessage implements CharSequence {
 
 	/**
 	 * Build a lazily resolving message from the given supplier.
-	 * @param supplier the supplier (typically bound to a Java 8 lambda expression)
+	 * @param supplier the supplier (typically bound to a lambda expression)
 	 * @see #toString()
 	 */
 	public static LogMessage of(Supplier<? extends CharSequence> supplier) {
@@ -87,63 +88,68 @@ public abstract class LogMessage implements CharSequence {
 	/**
 	 * Build a lazily formatted message from the given format string and argument.
 	 * @param format the format string (following {@link String#format} rules)
-	 * @param arg1 the argument
+	 * @param arg1 the argument (can be {@code null})
 	 * @see String#format(String, Object...)
 	 */
-	public static LogMessage format(String format, Object arg1) {
+	public static LogMessage format(String format, @Nullable Object arg1) {
 		return new FormatMessage1(format, arg1);
 	}
 
 	/**
 	 * Build a lazily formatted message from the given format string and arguments.
 	 * @param format the format string (following {@link String#format} rules)
-	 * @param arg1 the first argument
-	 * @param arg2 the second argument
+	 * @param arg1 the first argument (can be {@code null})
+	 * @param arg2 the second argument (can be {@code null})
 	 * @see String#format(String, Object...)
 	 */
-	public static LogMessage format(String format, Object arg1, Object arg2) {
+	public static LogMessage format(String format, @Nullable Object arg1, @Nullable Object arg2) {
 		return new FormatMessage2(format, arg1, arg2);
 	}
 
 	/**
 	 * Build a lazily formatted message from the given format string and arguments.
 	 * @param format the format string (following {@link String#format} rules)
-	 * @param arg1 the first argument
-	 * @param arg2 the second argument
-	 * @param arg3 the third argument
+	 * @param arg1 the first argument (can be {@code null})
+	 * @param arg2 the second argument (can be {@code null})
+	 * @param arg3 the third argument (can be {@code null})
 	 * @see String#format(String, Object...)
 	 */
-	public static LogMessage format(String format, Object arg1, Object arg2, Object arg3) {
+	public static LogMessage format(String format, @Nullable Object arg1, @Nullable Object arg2, @Nullable Object arg3) {
 		return new FormatMessage3(format, arg1, arg2, arg3);
 	}
 
 	/**
 	 * Build a lazily formatted message from the given format string and arguments.
 	 * @param format the format string (following {@link String#format} rules)
-	 * @param arg1 the first argument
-	 * @param arg2 the second argument
-	 * @param arg3 the third argument
-	 * @param arg4 the fourth argument
+	 * @param arg1 the first argument (can be {@code null})
+	 * @param arg2 the second argument (can be {@code null})
+	 * @param arg3 the third argument (can be {@code null})
+	 * @param arg4 the fourth argument (can be {@code null})
 	 * @see String#format(String, Object...)
 	 */
-	public static LogMessage format(String format, Object arg1, Object arg2, Object arg3, Object arg4) {
+	public static LogMessage format(String format, @Nullable Object arg1, @Nullable Object arg2, @Nullable Object arg3,
+			@Nullable Object arg4) {
 		return new FormatMessage4(format, arg1, arg2, arg3, arg4);
 	}
 
 	/**
 	 * Build a lazily formatted message from the given format string and varargs.
+	 * <p>This varargs {@code format()} variant may be costly. You should therefore
+	 * use the individual argument variants whenever possible:
+	 * {@link #format(String, Object)}, {@link #format(String, Object, Object)}, etc.
 	 * @param format the format string (following {@link String#format} rules)
-	 * @param args the varargs array (costly, prefer individual arguments)
+	 * @param args the varargs array (can be {@code null} and can contain {@code null}
+	 * elements)
 	 * @see String#format(String, Object...)
 	 */
-	public static LogMessage format(String format, Object... args) {
+	public static LogMessage format(String format, @Nullable Object... args) {
 		return new FormatMessageX(format, args);
 	}
 
 
 	private static final class SupplierMessage extends LogMessage {
 
-		private Supplier<? extends CharSequence> supplier;
+		private final Supplier<? extends CharSequence> supplier;
 
 		SupplierMessage(Supplier<? extends CharSequence> supplier) {
 			Assert.notNull(supplier, "Supplier must not be null");
@@ -170,9 +176,10 @@ public abstract class LogMessage implements CharSequence {
 
 	private static final class FormatMessage1 extends FormatMessage {
 
+		@Nullable
 		private final Object arg1;
 
-		FormatMessage1(String format, Object arg1) {
+		FormatMessage1(String format, @Nullable Object arg1) {
 			super(format);
 			this.arg1 = arg1;
 		}
@@ -186,11 +193,13 @@ public abstract class LogMessage implements CharSequence {
 
 	private static final class FormatMessage2 extends FormatMessage {
 
+		@Nullable
 		private final Object arg1;
 
+		@Nullable
 		private final Object arg2;
 
-		FormatMessage2(String format, Object arg1, Object arg2) {
+		FormatMessage2(String format, @Nullable Object arg1, @Nullable Object arg2) {
 			super(format);
 			this.arg1 = arg1;
 			this.arg2 = arg2;
@@ -205,13 +214,16 @@ public abstract class LogMessage implements CharSequence {
 
 	private static final class FormatMessage3 extends FormatMessage {
 
+		@Nullable
 		private final Object arg1;
 
+		@Nullable
 		private final Object arg2;
 
+		@Nullable
 		private final Object arg3;
 
-		FormatMessage3(String format, Object arg1, Object arg2, Object arg3) {
+		FormatMessage3(String format, @Nullable Object arg1, @Nullable Object arg2, @Nullable Object arg3) {
 			super(format);
 			this.arg1 = arg1;
 			this.arg2 = arg2;
@@ -227,15 +239,20 @@ public abstract class LogMessage implements CharSequence {
 
 	private static final class FormatMessage4 extends FormatMessage {
 
+		@Nullable
 		private final Object arg1;
 
+		@Nullable
 		private final Object arg2;
 
+		@Nullable
 		private final Object arg3;
 
+		@Nullable
 		private final Object arg4;
 
-		FormatMessage4(String format, Object arg1, Object arg2, Object arg3, Object arg4) {
+		FormatMessage4(String format, @Nullable Object arg1, @Nullable Object arg2, @Nullable Object arg3,
+				@Nullable Object arg4) {
 			super(format);
 			this.arg1 = arg1;
 			this.arg2 = arg2;
@@ -252,9 +269,10 @@ public abstract class LogMessage implements CharSequence {
 
 	private static final class FormatMessageX extends FormatMessage {
 
+		@Nullable
 		private final Object[] args;
 
-		FormatMessageX(String format, Object... args) {
+		FormatMessageX(String format, @Nullable Object... args) {
 			super(format);
 			this.args = args;
 		}

spring-core/src/main/java/org/springframework/core/task/support/ExecutorServiceAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -90,4 +90,9 @@ public class ExecutorServiceAdapter extends AbstractExecutorService {
 		return false;
 	}
 
+	// @Override on JDK 19
+	public void close() {
+		// no-op in order to avoid container-triggered shutdown call which would lead to exception logging
+	}
+
 }

spring-core/src/main/java/org/springframework/util/InstanceFilter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -64,7 +64,7 @@ public class InstanceFilter<T> {
 
 
 	/**
-	 * Determine if the specified {code instance} matches this filter.
+	 * Determine if the specified {@code instance} matches this filter.
 	 */
 	public boolean match(T instance) {
 		Assert.notNull(instance, "Instance to match must not be null");

spring-core/src/main/java/org/springframework/util/ObjectUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,8 +17,13 @@
 package org.springframework.util;
 
 import java.lang.reflect.Array;
+import java.net.URI;
+import java.net.URL;
+import java.time.temporal.Temporal;
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.Date;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Optional;
 import java.util.StringJoiner;
@@ -653,6 +658,7 @@ public abstract class ObjectUtils {
 	 * Returns a {@code "null"} String if {@code obj} is {@code null}.
 	 * @param obj the object to build a String representation for
 	 * @return a String representation of {@code obj}
+	 * @see #nullSafeConciseToString(Object)
 	 */
 	public static String nullSafeToString(@Nullable Object obj) {
 		if (obj == null) {
@@ -908,4 +914,73 @@ public abstract class ObjectUtils {
 		return stringJoiner.toString();
 	}
 
+	/**
+	 * Generate a null-safe, concise string representation of the supplied object
+	 * as described below.
+	 * <p>Favor this method over {@link #nullSafeToString(Object)} when you need
+	 * the length of the generated string to be limited.
+	 * <p>Returns:
+	 * <ul>
+	 * <li>{@code "null"} if {@code obj} is {@code null}</li>
+	 * <li>{@linkplain Class#getName() Class name} if {@code obj} is a {@link Class}</li>
+	 * <li>Potentially {@linkplain StringUtils#truncate(CharSequence) truncated string}
+	 * if {@code obj} is a {@link String} or {@link CharSequence}</li>
+	 * <li>Potentially {@linkplain StringUtils#truncate(CharSequence) truncated string}
+	 * if {@code obj} is a <em>simple type</em> whose {@code toString()} method returns
+	 * a non-null value.</li>
+	 * <li>Otherwise, a string representation of the object's type name concatenated
+	 * with {@code @} and a hex string form of the object's identity hash code</li>
+	 * </ul>
+	 * <p>In the context of this method, a <em>simple type</em> is any of the following:
+	 * a primitive wrapper (excluding {@link Void}), an {@link Enum}, a {@link Number},
+	 * a {@link Date}, a {@link Temporal}, a {@link URI}, a {@link URL}, or a {@link Locale}.
+	 * @param obj the object to build a string representation for
+	 * @return a concise string representation of the supplied object
+	 * @since 5.3.27
+	 * @see #nullSafeToString(Object)
+	 * @see StringUtils#truncate(CharSequence)
+	 */
+	public static String nullSafeConciseToString(@Nullable Object obj) {
+		if (obj == null) {
+			return "null";
+		}
+		if (obj instanceof Class<?>) {
+			return ((Class<?>) obj).getName();
+		}
+		if (obj instanceof CharSequence) {
+			return StringUtils.truncate((CharSequence) obj);
+		}
+		Class<?> type = obj.getClass();
+		if (isSimpleValueType(type)) {
+			String str = obj.toString();
+			if (str != null) {
+				return StringUtils.truncate(str);
+			}
+		}
+		return type.getTypeName() + "@" + getIdentityHexString(obj);
+	}
+
+	/**
+	 * Copy of {@link org.springframework.beans.BeanUtils#isSimpleValueType(Class)}.
+	 * <p>Check if the given type represents a "simple" value type: a primitive or
+	 * primitive wrapper, an enum, a String or other CharSequence, a Number, a
+	 * Date, a Temporal, a URI, a URL, a Locale, or a Class.
+	 * <p>{@code Void} and {@code void} are not considered simple value types.
+	 * @param type the type to check
+	 * @return whether the given type represents a "simple" value type
+	 */
+	private static boolean isSimpleValueType(Class<?> type) {
+		return (Void.class != type && void.class != type &&
+				(ClassUtils.isPrimitiveOrWrapper(type) ||
+				Enum.class.isAssignableFrom(type) ||
+				CharSequence.class.isAssignableFrom(type) ||
+				Number.class.isAssignableFrom(type) ||
+				Date.class.isAssignableFrom(type) ||
+				Temporal.class.isAssignableFrom(type) ||
+				URI.class == type ||
+				URL.class == type ||
+				Locale.class == type ||
+				Class.class == type));
+	}
+
 }

spring-core/src/main/java/org/springframework/util/StringUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -75,6 +75,10 @@ public abstract class StringUtils {
 
 	private static final char EXTENSION_SEPARATOR = '.';
 
+	private static final int DEFAULT_TRUNCATION_THRESHOLD = 100;
+
+	private static final String TRUNCATION_SUFFIX = " (truncated)...";
+
 
 	//---------------------------------------------------------------------
 	// General convenience methods for working with Strings
@@ -1388,4 +1392,40 @@ public abstract class StringUtils {
 		return arrayToDelimitedString(arr, ",");
 	}
 
+	/**
+	 * Truncate the supplied {@link CharSequence}.
+	 * <p>Delegates to {@link #truncate(CharSequence, int)}, supplying {@code 100}
+	 * as the threshold.
+	 * @param charSequence the {@code CharSequence} to truncate
+	 * @return a truncated string, or a string representation of the original
+	 * {@code CharSequence} if its length does not exceed the threshold
+	 * @since 5.3.27
+	 */
+	public static String truncate(CharSequence charSequence) {
+		return truncate(charSequence, DEFAULT_TRUNCATION_THRESHOLD);
+	}
+
+	/**
+	 * Truncate the supplied {@link CharSequence}.
+	 * <p>If the length of the {@code CharSequence} is greater than the threshold,
+	 * this method returns a {@linkplain CharSequence#subSequence(int, int)
+	 * subsequence} of the {@code CharSequence} (up to the threshold) appended
+	 * with the suffix {@code " (truncated)..."}. Otherwise, this method returns
+	 * {@code charSequence.toString()}.
+	 * @param charSequence the {@code CharSequence} to truncate
+	 * @param threshold the maximum length after which to truncate; must be a
+	 * positive number
+	 * @return a truncated string, or a string representation of the original
+	 * {@code CharSequence} if its length does not exceed the threshold
+	 * @since 5.3.27
+	 */
+	public static String truncate(CharSequence charSequence, int threshold) {
+		Assert.isTrue(threshold > 0,
+				() -> "Truncation threshold must be a positive number: " + threshold);
+		if (charSequence.length() > threshold) {
+			return charSequence.subSequence(0, threshold) + TRUNCATION_SUFFIX;
+		}
+		return charSequence.toString();
+	}
+
 }

spring-core/src/test/java/org/springframework/util/ObjectUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,15 +17,25 @@
 package org.springframework.util;
 
 import java.io.IOException;
+import java.net.URI;
+import java.net.URL;
 import java.sql.SQLException;
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
+import java.util.Date;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
 import java.util.Set;
 
+import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
 import static org.springframework.util.ObjectUtils.isEmpty;
 
@@ -816,7 +826,144 @@ class ObjectUtilsTests {
 			.withMessage("Constant [bogus] does not exist in enum type org.springframework.util.ObjectUtilsTests$Tropes");
 	}
 
-	private void assertEqualHashCodes(int expected, Object array) {
+	@Nested
+	class NullSafeConciseToStringTests {
+
+		private final String truncated = " (truncated)...";
+		private final int truncatedLength = 100 + truncated.length();
+
+		@Test
+		void nullSafeConciseToStringForNull() {
+			assertThat(ObjectUtils.nullSafeConciseToString(null)).isEqualTo("null");
+		}
+
+		@Test
+		void nullSafeConciseToStringForClass() {
+			assertThat(ObjectUtils.nullSafeConciseToString(String.class)).isEqualTo("java.lang.String");
+		}
+
+		@Test
+		void nullSafeConciseToStringForStrings() {
+			String repeat100 = repeat("X", 100);
+			String repeat101 = repeat("X", 101);
+
+			assertThat(ObjectUtils.nullSafeConciseToString("")).isEqualTo("");
+			assertThat(ObjectUtils.nullSafeConciseToString("foo")).isEqualTo("foo");
+			assertThat(ObjectUtils.nullSafeConciseToString(repeat100)).isEqualTo(repeat100);
+			assertThat(ObjectUtils.nullSafeConciseToString(repeat101)).hasSize(truncatedLength).endsWith(truncated);
+		}
+
+		@Test
+		void nullSafeConciseToStringForStringBuilders() {
+			String repeat100 = repeat("X", 100);
+			String repeat101 = repeat("X", 101);
+
+			assertThat(ObjectUtils.nullSafeConciseToString(new StringBuilder("foo"))).isEqualTo("foo");
+			assertThat(ObjectUtils.nullSafeConciseToString(new StringBuilder(repeat100))).isEqualTo(repeat100);
+			assertThat(ObjectUtils.nullSafeConciseToString(new StringBuilder(repeat101))).hasSize(truncatedLength).endsWith(truncated);
+		}
+
+		@Test
+		void nullSafeConciseToStringForEnum() {
+			assertThat(ObjectUtils.nullSafeConciseToString(Tropes.FOO)).isEqualTo("FOO");
+		}
+
+		@Test
+		void nullSafeConciseToStringForNumber() {
+			assertThat(ObjectUtils.nullSafeConciseToString(42L)).isEqualTo("42");
+			assertThat(ObjectUtils.nullSafeConciseToString(99.1234D)).isEqualTo("99.1234");
+		}
+
+		@Test
+		void nullSafeConciseToStringForDate() {
+			Date date = new Date();
+			assertThat(ObjectUtils.nullSafeConciseToString(date)).isEqualTo(date.toString());
+		}
+
+		@Test
+		void nullSafeConciseToStringForTemporal() {
+			LocalDate localDate = LocalDate.now();
+			assertThat(ObjectUtils.nullSafeConciseToString(localDate)).isEqualTo(localDate.toString());
+		}
+
+		@Test
+		void nullSafeConciseToStringForUri() {
+			String uri = "https://www.example.com/?foo=1&bar=2&baz=3";
+			assertThat(ObjectUtils.nullSafeConciseToString(URI.create(uri))).isEqualTo(uri);
+
+			uri += "&qux=" + repeat("4", 60);
+			assertThat(ObjectUtils.nullSafeConciseToString(URI.create(uri)))
+					.hasSize(truncatedLength)
+					.startsWith(uri.subSequence(0, 100))
+					.endsWith(truncated);
+		}
+
+		@Test
+		void nullSafeConciseToStringForUrl() throws Exception {
+			String url = "https://www.example.com/?foo=1&bar=2&baz=3";
+			assertThat(ObjectUtils.nullSafeConciseToString(new URL(url))).isEqualTo(url);
+
+			url += "&qux=" + repeat("4", 60);
+			assertThat(ObjectUtils.nullSafeConciseToString(new URL(url)))
+					.hasSize(truncatedLength)
+					.startsWith(url.subSequence(0, 100))
+					.endsWith(truncated);
+		}
+
+		@Test
+		void nullSafeConciseToStringForLocale() {
+			assertThat(ObjectUtils.nullSafeConciseToString(Locale.GERMANY)).isEqualTo("de_DE");
+		}
+
+		@Test
+		void nullSafeConciseToStringForArraysAndCollections() {
+			List<String> list = Arrays.asList("a", "b", "c");
+			assertThat(ObjectUtils.nullSafeConciseToString(new int[][] {{1, 2}, {3, 4}})).startsWith(prefix(int[][].class));
+			assertThat(ObjectUtils.nullSafeConciseToString(list.toArray(new Object[0]))).startsWith(prefix(Object[].class));
+			assertThat(ObjectUtils.nullSafeConciseToString(list.toArray(new String[0]))).startsWith(prefix(String[].class));
+			assertThat(ObjectUtils.nullSafeConciseToString(new ArrayList<>(list))).startsWith(prefix(ArrayList.class));
+			assertThat(ObjectUtils.nullSafeConciseToString(new HashSet<>(list))).startsWith(prefix(HashSet.class));
+		}
+
+		@Test
+		void nullSafeConciseToStringForCustomTypes() {
+			class ExplosiveType {
+				@Override
+				public String toString() {
+					throw new UnsupportedOperationException("no-go");
+				}
+			}
+			ExplosiveType explosiveType = new ExplosiveType();
+			assertThatExceptionOfType(UnsupportedOperationException.class).isThrownBy(explosiveType::toString);
+			assertThat(ObjectUtils.nullSafeConciseToString(explosiveType)).startsWith(prefix(ExplosiveType.class));
+
+			class WordyType {
+				@Override
+				public String toString() {
+					return repeat("blah blah", 20);
+				}
+			}
+			WordyType wordyType = new WordyType();
+			assertThat(wordyType).asString().hasSizeGreaterThanOrEqualTo(180 /* 9x20 */);
+			assertThat(ObjectUtils.nullSafeConciseToString(wordyType)).startsWith(prefix(WordyType.class));
+		}
+
+		private String repeat(String str, int count) {
+			String result = "";
+			for (int i = 0; i < count; i++) {
+				result += str;
+			}
+			return result;
+		}
+
+		private String prefix(Class<?> clazz) {
+			return clazz.getTypeName() + "@";
+		}
+
+	}
+
+
+	private static void assertEqualHashCodes(int expected, Object array) {
 		int actual = ObjectUtils.nullSafeHashCode(array);
 		assertThat(actual).isEqualTo(expected);
 		assertThat(array.hashCode() != actual).isTrue();

spring-core/src/test/java/org/springframework/util/StringUtilsTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,6 +22,8 @@ import java.util.Locale;
 import java.util.Properties;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
@@ -785,4 +787,26 @@ class StringUtilsTests {
 		assertThat(StringUtils.collectionToCommaDelimitedString(Collections.singletonList(null))).isEqualTo("null");
 	}
 
+	@Test
+	void truncatePreconditions() {
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> StringUtils.truncate("foo", 0))
+				.withMessage("Truncation threshold must be a positive number: 0");
+		assertThatIllegalArgumentException()
+				.isThrownBy(() -> StringUtils.truncate("foo", -99))
+				.withMessage("Truncation threshold must be a positive number: -99");
+	}
+
+	@ParameterizedTest
+	@CsvSource(delimiterString = "-->", value = {
+		"''                  --> ''",
+		"aardvark            --> aardvark",
+		"aardvark12          --> aardvark12",
+		"aardvark123         --> aardvark12 (truncated)...",
+		"aardvark, bird, cat --> aardvark,  (truncated)..."
+	})
+	void truncate(String text, String truncated) {
+		assertThat(StringUtils.truncate(text, 10)).isEqualTo(truncated);
+	}
+
 }

spring-expression/src/main/java/org/springframework/expression/EvaluationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.expression;
 
 import java.util.List;
+import java.util.function.Supplier;
 
 import org.springframework.lang.Nullable;
 
@@ -24,12 +25,21 @@ import org.springframework.lang.Nullable;
  * Expressions are executed in an evaluation context. It is in this context that
  * references are resolved when encountered during expression evaluation.
  *
- * <p>There is a default implementation of this EvaluationContext interface:
- * {@link org.springframework.expression.spel.support.StandardEvaluationContext}
- * which can be extended, rather than having to implement everything manually.
+ * <p>There are two default implementations of this interface.
+ * <ul>
+ * <li>{@link org.springframework.expression.spel.support.SimpleEvaluationContext
+ * SimpleEvaluationContext}: a simpler builder-style {@code EvaluationContext}
+ * variant for data-binding purposes, which allows for opting into several SpEL
+ * features as needed.</li>
+ * <li>{@link org.springframework.expression.spel.support.StandardEvaluationContext
+ * StandardEvaluationContext}: a powerful and highly configurable {@code EvaluationContext}
+ * implementation, which can be extended, rather than having to implement everything
+ * manually.</li>
+ * </ul>
  *
  * @author Andy Clement
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 3.0
  */
 public interface EvaluationContext {
@@ -85,7 +95,30 @@ public interface EvaluationContext {
 	OperatorOverloader getOperatorOverloader();
 
 	/**
-	 * Set a named variable within this evaluation context to a specified value.
+	 * Assign the value created by the specified {@link Supplier} to a named variable
+	 * within this evaluation context.
+	 * <p>In contrast to {@link #setVariable(String, Object)}, this method should only
+	 * be invoked to support the assignment operator ({@code =}) within an expression.
+	 * <p>By default, this method delegates to {@code setVariable(String, Object)},
+	 * providing the value created by the {@code valueSupplier}. Concrete implementations
+	 * may override this <em>default</em> method to provide different semantics.
+	 * @param name the name of the variable to assign
+	 * @param valueSupplier the supplier of the value to be assigned to the variable
+	 * @return a {@link TypedValue} wrapping the assigned value
+	 * @since 5.2.24
+	 */
+	default TypedValue assignVariable(String name, Supplier<TypedValue> valueSupplier) {
+		TypedValue typedValue = valueSupplier.get();
+		setVariable(name, typedValue.getValue());
+		return typedValue;
+	}
+
+	/**
+	 * Set a named variable in this evaluation context to a specified value.
+	 * <p>In contrast to {@link #assignVariable(String, Supplier)}, this method
+	 * should only be invoked programmatically when interacting directly with the
+	 * {@code EvaluationContext} &mdash; for example, to provide initial
+	 * configuration for the context.
 	 * @param name the name of the variable to set
 	 * @param value the value to be placed in the variable
 	 */
@@ -93,7 +126,7 @@ public interface EvaluationContext {
 
 	/**
 	 * Look up a named variable within this evaluation context.
-	 * @param name variable to lookup
+	 * @param name the name of the variable to look up
 	 * @return the value of the variable, or {@code null} if not found
 	 */
 	@Nullable

spring-expression/src/main/java/org/springframework/expression/spel/ExpressionState.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +23,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.NoSuchElementException;
+import java.util.function.Supplier;
 
 import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.expression.EvaluationContext;
@@ -38,18 +39,19 @@ import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
 
 /**
- * An ExpressionState is for maintaining per-expression-evaluation state, any changes to
- * it are not seen by other expressions but it gives a place to hold local variables and
+ * ExpressionState is for maintaining per-expression-evaluation state: any changes to
+ * it are not seen by other expressions, but it gives a place to hold local variables and
  * for component expressions in a compound expression to communicate state. This is in
  * contrast to the EvaluationContext, which is shared amongst expression evaluations, and
  * any changes to it will be seen by other expressions or any code that chooses to ask
  * questions of the context.
  *
- * <p>It also acts as a place for to define common utility routines that the various AST
+ * <p>It also acts as a place to define common utility routines that the various AST
  * nodes might need.
  *
  * @author Andy Clement
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 3.0
  */
 public class ExpressionState {
@@ -138,6 +140,29 @@ public class ExpressionState {
 		return this.scopeRootObjects.element();
 	}
 
+	/**
+	 * Assign the value created by the specified {@link Supplier} to a named variable
+	 * within the evaluation context.
+	 * <p>In contrast to {@link #setVariable(String, Object)}, this method should
+	 * only be invoked to support assignment within an expression.
+	 * @param name the name of the variable to assign
+	 * @param valueSupplier the supplier of the value to be assigned to the variable
+	 * @return a {@link TypedValue} wrapping the assigned value
+	 * @since 5.2.24
+	 * @see EvaluationContext#assignVariable(String, Supplier)
+	 */
+	public TypedValue assignVariable(String name, Supplier<TypedValue> valueSupplier) {
+		return this.relatedContext.assignVariable(name, valueSupplier);
+	}
+
+	/**
+	 * Set a named variable in the evaluation context to a specified value.
+	 * <p>In contrast to {@link #assignVariable(String, Supplier)}, this method
+	 * should only be invoked programmatically.
+	 * @param name the name of the variable to set
+	 * @param value the value to be placed in the variable
+	 * @see EvaluationContext#setVariable(String, Object)
+	 */
 	public void setVariable(String name, @Nullable Object value) {
 		this.relatedContext.setVariable(name, value);
 	}

spring-expression/src/main/java/org/springframework/expression/spel/SpelMessage.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -264,7 +264,27 @@ public enum SpelMessage {
 
 	/** @since 5.3.17 */
 	MAX_ARRAY_ELEMENTS_THRESHOLD_EXCEEDED(Kind.ERROR, 1075,
-			"Array declares too many elements, exceeding the threshold of ''{0}''");
+			"Array declares too many elements, exceeding the threshold of ''{0}''"),
+
+	/** @since 5.2.23 */
+	MAX_REPEATED_TEXT_SIZE_EXCEEDED(Kind.ERROR, 1076,
+			"Repeated text is too long, exceeding the threshold of ''{0}'' characters"),
+
+	/** @since 5.2.23 */
+	MAX_REGEX_LENGTH_EXCEEDED(Kind.ERROR, 1077,
+			"Regular expression is too long, exceeding the threshold of ''{0}'' characters"),
+
+	/** @since 5.2.24 */
+	MAX_CONCATENATED_STRING_LENGTH_EXCEEDED(Kind.ERROR, 1078,
+			"Concatenated string is too long, exceeding the threshold of ''{0}'' characters"),
+
+	/** @since 5.2.24 */
+	MAX_EXPRESSION_LENGTH_EXCEEDED(Kind.ERROR, 1079,
+			"SpEL expression is too long, exceeding the threshold of ''{0}'' characters"),
+
+	/** @since 5.2.24 */
+	VARIABLE_ASSIGNMENT_NOT_SUPPORTED(Kind.ERROR, 1080,
+			"Assignment to variable ''{0}'' is not supported");
 
 
 	private final Kind kind;

spring-expression/src/main/java/org/springframework/expression/spel/ast/Assign.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@ import org.springframework.expression.spel.ExpressionState;
  * <p>Example: 'someNumberProperty=42'
  *
  * @author Andy Clement
+ * @author Sam Brannen
  * @since 3.0
  */
 public class Assign extends SpelNodeImpl {
@@ -38,9 +39,7 @@ public class Assign extends SpelNodeImpl {
 
 	@Override
 	public TypedValue getValueInternal(ExpressionState state) throws EvaluationException {
-		TypedValue newValue = this.children[1].getValueInternal(state);
-		getChild(0).setValue(state, newValue.getValue());
-		return newValue;
+		return this.children[0].setValueInternal(state, () -> this.children[1].getValueInternal(state));
 	}
 
 	@Override

spring-expression/src/main/java/org/springframework/expression/spel/ast/CompoundExpression.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.expression.spel.ast;
 
 import java.util.StringJoiner;
+import java.util.function.Supplier;
 
 import org.springframework.asm.MethodVisitor;
 import org.springframework.expression.EvaluationException;
@@ -24,13 +25,13 @@ import org.springframework.expression.TypedValue;
 import org.springframework.expression.spel.CodeFlow;
 import org.springframework.expression.spel.ExpressionState;
 import org.springframework.expression.spel.SpelEvaluationException;
-import org.springframework.lang.Nullable;
 
 /**
  * Represents a DOT separated expression sequence, such as
  * {@code 'property1.property2.methodOne()'}.
  *
  * @author Andy Clement
+ * @author Sam Brannen
  * @since 3.0
  */
 public class CompoundExpression extends SpelNodeImpl {
@@ -95,8 +96,12 @@ public class CompoundExpression extends SpelNodeImpl {
 	}
 
 	@Override
-	public void setValue(ExpressionState state, @Nullable Object value) throws EvaluationException {
-		getValueRef(state).setValue(value);
+	public TypedValue setValueInternal(ExpressionState state, Supplier<TypedValue> valueSupplier)
+			throws EvaluationException {
+
+		TypedValue typedValue = valueSupplier.get();
+		getValueRef(state).setValue(typedValue.getValue());
+		return typedValue;
 	}
 
 	@Override

spring-expression/src/main/java/org/springframework/expression/spel/ast/FunctionReference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -144,7 +144,7 @@ public class FunctionReference extends SpelNodeImpl {
 		for (int i = 0; i < getChildCount(); i++) {
 			sj.add(getChild(i).toStringAST());
 		}
-		return '#' + this.name + sj.toString();
+		return '#' + this.name + sj;
 	}
 
 	/**

spring-expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,7 @@ import java.util.Collection;
 import java.util.List;
 import java.util.Map;
 import java.util.StringJoiner;
+import java.util.function.Supplier;
 
 import org.springframework.asm.MethodVisitor;
 import org.springframework.core.convert.TypeDescriptor;
@@ -45,11 +46,12 @@ import org.springframework.util.ReflectionUtils;
 
 /**
  * An Indexer can index into some proceeding structure to access a particular piece of it.
- * Supported structures are: strings / collections (lists/sets) / arrays.
+ * <p>Supported structures are: strings / collections (lists/sets) / arrays.
  *
  * @author Andy Clement
  * @author Phillip Webb
  * @author Stephane Nicoll
+ * @author Sam Brannen
  * @since 3.0
  */
 // TODO support multidimensional arrays
@@ -102,8 +104,12 @@ public class Indexer extends SpelNodeImpl {
 	}
 
 	@Override
-	public void setValue(ExpressionState state, @Nullable Object newValue) throws EvaluationException {
-		getValueRef(state).setValue(newValue);
+	public TypedValue setValueInternal(ExpressionState state, Supplier<TypedValue> valueSupplier)
+			throws EvaluationException {
+
+		TypedValue typedValue = valueSupplier.get();
+		getValueRef(state).setValue(typedValue.getValue());
+		return typedValue;
 	}
 
 	@Override

spring-expression/src/main/java/org/springframework/expression/spel/ast/MethodReference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -263,7 +263,7 @@ public class MethodReference extends SpelNodeImpl {
 		for (int i = 0; i < getChildCount(); i++) {
 			sj.add(getChild(i).toStringAST());
 		}
-		return this.name + sj.toString();
+		return this.name + sj;
 	}
 
 	/**
@@ -288,12 +288,9 @@ public class MethodReference extends SpelNodeImpl {
 		if (executor.didArgumentConversionOccur()) {
 			return false;
 		}
-		Class<?> clazz = executor.getMethod().getDeclaringClass();
-		if (!Modifier.isPublic(clazz.getModifiers()) && executor.getPublicDeclaringClass() == null) {
-			return false;
-		}
 
-		return true;
+		Class<?> clazz = executor.getMethod().getDeclaringClass();
+		return (Modifier.isPublic(clazz.getModifiers()) || executor.getPublicDeclaringClass() != null);
 	}
 
 	@Override

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpMultiply.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,8 @@ import org.springframework.expression.Operation;
 import org.springframework.expression.TypedValue;
 import org.springframework.expression.spel.CodeFlow;
 import org.springframework.expression.spel.ExpressionState;
+import org.springframework.expression.spel.SpelEvaluationException;
+import org.springframework.expression.spel.SpelMessage;
 import org.springframework.util.Assert;
 import org.springframework.util.NumberUtils;
 
@@ -52,6 +54,13 @@ import org.springframework.util.NumberUtils;
  */
 public class OpMultiply extends Operator {
 
+	/**
+	 * Maximum number of characters permitted in repeated text.
+	 * @since 5.2.23
+	 */
+	private static final int MAX_REPEATED_TEXT_SIZE = 256;
+
+
 	public OpMultiply(int startPos, int endPos, SpelNodeImpl... operands) {
 		super("*", startPos, endPos, operands);
 	}
@@ -109,10 +118,13 @@ public class OpMultiply extends Operator {
 		}
 
 		if (leftOperand instanceof String && rightOperand instanceof Integer) {
-			int repeats = (Integer) rightOperand;
-			StringBuilder result = new StringBuilder();
-			for (int i = 0; i < repeats; i++) {
-				result.append(leftOperand);
+			String text = (String) leftOperand;
+			int count = (Integer) rightOperand;
+			int requestedSize = text.length() * count;
+			checkRepeatedTextSize(requestedSize);
+			StringBuilder result = new StringBuilder(requestedSize);
+			for (int i = 0; i < count; i++) {
+				result.append(text);
 			}
 			return new TypedValue(result.toString());
 		}
@@ -120,6 +132,13 @@ public class OpMultiply extends Operator {
 		return state.operate(Operation.MULTIPLY, leftOperand, rightOperand);
 	}
 
+	private void checkRepeatedTextSize(int requestedSize) {
+		if (requestedSize > MAX_REPEATED_TEXT_SIZE) {
+			throw new SpelEvaluationException(getStartPosition(),
+					SpelMessage.MAX_REPEATED_TEXT_SIZE_EXCEEDED, MAX_REPEATED_TEXT_SIZE);
+		}
+	}
+
 	@Override
 	public boolean isCompilable() {
 		if (!getLeftOperand().isCompilable()) {

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpPlus.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +27,8 @@ import org.springframework.expression.TypeConverter;
 import org.springframework.expression.TypedValue;
 import org.springframework.expression.spel.CodeFlow;
 import org.springframework.expression.spel.ExpressionState;
+import org.springframework.expression.spel.SpelEvaluationException;
+import org.springframework.expression.spel.SpelMessage;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.NumberUtils;
@@ -46,10 +48,18 @@ import org.springframework.util.NumberUtils;
  * @author Juergen Hoeller
  * @author Ivo Smid
  * @author Giovanni Dall'Oglio Risso
+ * @author Sam Brannen
  * @since 3.0
  */
 public class OpPlus extends Operator {
 
+	/**
+	 * Maximum number of characters permitted in a concatenated string.
+	 * @since 5.2.24
+	 */
+	private static final int MAX_CONCATENATED_STRING_LENGTH = 100_000;
+
+
 	public OpPlus(int startPos, int endPos, SpelNodeImpl... operands) {
 		super("+", startPos, endPos, operands);
 		Assert.notEmpty(operands, "Operands must not be empty");
@@ -123,22 +133,45 @@ public class OpPlus extends Operator {
 
 		if (leftOperand instanceof String && rightOperand instanceof String) {
 			this.exitTypeDescriptor = "Ljava/lang/String";
-			return new TypedValue((String) leftOperand + rightOperand);
+			String leftString = (String) leftOperand;
+			String rightString = (String) rightOperand;
+			checkStringLength(leftString);
+			checkStringLength(rightString);
+			return concatenate(leftString, rightString);
 		}
 
 		if (leftOperand instanceof String) {
-			return new TypedValue(
-					leftOperand + (rightOperand == null ? "null" : convertTypedValueToString(operandTwoValue, state)));
+			String leftString = (String) leftOperand;
+			checkStringLength(leftString);
+			String rightString = (rightOperand == null ? "null" : convertTypedValueToString(operandTwoValue, state));
+			checkStringLength(rightString);
+			return concatenate(leftString, rightString);
 		}
 
 		if (rightOperand instanceof String) {
-			return new TypedValue(
-					(leftOperand == null ? "null" : convertTypedValueToString(operandOneValue, state)) + rightOperand);
+			String rightString = (String) rightOperand;
+			checkStringLength(rightString);
+			String leftString = (leftOperand == null ? "null" : convertTypedValueToString(operandOneValue, state));
+			checkStringLength(leftString);
+			return concatenate(leftString, rightString);
 		}
 
 		return state.operate(Operation.ADD, leftOperand, rightOperand);
 	}
 
+	private void checkStringLength(String string) {
+		if (string.length() > MAX_CONCATENATED_STRING_LENGTH) {
+			throw new SpelEvaluationException(getStartPosition(),
+					SpelMessage.MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, MAX_CONCATENATED_STRING_LENGTH);
+		}
+	}
+
+	private TypedValue concatenate(String leftString, String rightString) {
+		String result = leftString + rightString;
+		checkStringLength(result);
+		return new TypedValue(result);
+	}
+
 	@Override
 	public String toStringAST() {
 		if (this.children.length < 2) {  // unary plus

spring-expression/src/main/java/org/springframework/expression/spel/ast/OperatorMatches.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,19 +36,41 @@ import org.springframework.expression.spel.support.BooleanTypedValue;
  *
  * @author Andy Clement
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 3.0
  */
 public class OperatorMatches extends Operator {
 
 	private static final int PATTERN_ACCESS_THRESHOLD = 1000000;
 
-	private final ConcurrentMap<String, Pattern> patternCache = new ConcurrentHashMap<>();
+	/**
+	 * Maximum number of characters permitted in a regular expression.
+	 * @since 5.2.23
+	 */
+	private static final int MAX_REGEX_LENGTH = 1000;
+
+	private final ConcurrentMap<String, Pattern> patternCache;
 
 
+	/**
+	 * Create a new {@link OperatorMatches} instance.
+	 * @deprecated as of Spring Framework 5.2.23 in favor of invoking
+	 * {@link #OperatorMatches(ConcurrentMap, int, int, SpelNodeImpl...)}
+	 * with a shared pattern cache instead
+	 */
+	@Deprecated
 	public OperatorMatches(int startPos, int endPos, SpelNodeImpl... operands) {
-		super("matches", startPos, endPos, operands);
+		this(new ConcurrentHashMap<>(), startPos, endPos, operands);
 	}
 
+	/**
+	 * Create a new {@link OperatorMatches} instance with a shared pattern cache.
+	 * @since 5.2.23
+	 */
+	public OperatorMatches(ConcurrentMap<String, Pattern> patternCache, int startPos, int endPos, SpelNodeImpl... operands) {
+		super("matches", startPos, endPos, operands);
+		this.patternCache = patternCache;
+	}
 
 	/**
 	 * Check the first operand matches the regex specified as the second operand.
@@ -62,26 +84,28 @@ public class OperatorMatches extends Operator {
 	public BooleanTypedValue getValueInternal(ExpressionState state) throws EvaluationException {
 		SpelNodeImpl leftOp = getLeftOperand();
 		SpelNodeImpl rightOp = getRightOperand();
-		String left = leftOp.getValue(state, String.class);
-		Object right = getRightOperand().getValue(state);
 
-		if (left == null) {
+		String input = leftOp.getValue(state, String.class);
+		if (input == null) {
 			throw new SpelEvaluationException(leftOp.getStartPosition(),
 					SpelMessage.INVALID_FIRST_OPERAND_FOR_MATCHES_OPERATOR, (Object) null);
 		}
+
+		Object right = rightOp.getValue(state);
 		if (!(right instanceof String)) {
 			throw new SpelEvaluationException(rightOp.getStartPosition(),
 					SpelMessage.INVALID_SECOND_OPERAND_FOR_MATCHES_OPERATOR, right);
 		}
+		String regex = (String) right;
 
 		try {
-			String rightString = (String) right;
-			Pattern pattern = this.patternCache.get(rightString);
+			Pattern pattern = this.patternCache.get(regex);
 			if (pattern == null) {
-				pattern = Pattern.compile(rightString);
-				this.patternCache.putIfAbsent(rightString, pattern);
+				checkRegexLength(regex);
+				pattern = Pattern.compile(regex);
+				this.patternCache.putIfAbsent(regex, pattern);
 			}
-			Matcher matcher = pattern.matcher(new MatcherInput(left, new AccessCount()));
+			Matcher matcher = pattern.matcher(new MatcherInput(input, new AccessCount()));
 			return BooleanTypedValue.forValue(matcher.matches());
 		}
 		catch (PatternSyntaxException ex) {
@@ -94,6 +118,13 @@ public class OperatorMatches extends Operator {
 		}
 	}
 
+	private void checkRegexLength(String regex) {
+		if (regex.length() > MAX_REGEX_LENGTH) {
+			throw new SpelEvaluationException(getStartPosition(),
+					SpelMessage.MAX_REGEX_LENGTH_EXCEEDED, MAX_REGEX_LENGTH);
+		}
+	}
+
 
 	private static class AccessCount {
 
@@ -111,7 +142,7 @@ public class OperatorMatches extends Operator {
 
 		private final CharSequence value;
 
-		private AccessCount access;
+		private final AccessCount access;
 
 		public MatcherInput(CharSequence value, AccessCount access) {
 			this.value = value;

spring-expression/src/main/java/org/springframework/expression/spel/ast/PropertyOrFieldReference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Supplier;
 
 import org.springframework.asm.Label;
 import org.springframework.asm.MethodVisitor;
@@ -46,6 +47,7 @@ import org.springframework.util.ReflectionUtils;
  * @author Andy Clement
  * @author Juergen Hoeller
  * @author Clark Duplichien
+ * @author Sam Brannen
  * @since 3.0
  */
 public class PropertyOrFieldReference extends SpelNodeImpl {
@@ -147,8 +149,12 @@ public class PropertyOrFieldReference extends SpelNodeImpl {
 	}
 
 	@Override
-	public void setValue(ExpressionState state, @Nullable Object newValue) throws EvaluationException {
-		writeProperty(state.getActiveContextObject(), state.getEvaluationContext(), this.name, newValue);
+	public TypedValue setValueInternal(ExpressionState state, Supplier<TypedValue> valueSupplier)
+			throws EvaluationException {
+
+		TypedValue typedValue = valueSupplier.get();
+		writeProperty(state.getActiveContextObject(), state.getEvaluationContext(), this.name, typedValue.getValue());
+		return typedValue;
 	}
 
 	@Override

spring-expression/src/main/java/org/springframework/expression/spel/ast/SpelNodeImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.springframework.expression.spel.ast;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Member;
 import java.lang.reflect.Method;
+import java.util.function.Supplier;
 
 import org.springframework.asm.MethodVisitor;
 import org.springframework.asm.Opcodes;
@@ -40,6 +41,7 @@ import org.springframework.util.ObjectUtils;
  *
  * @author Andy Clement
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 3.0
  */
 public abstract class SpelNodeImpl implements SpelNode, Opcodes {
@@ -64,7 +66,7 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 	 * <p>The descriptor is like the bytecode form but is slightly easier to work with.
 	 * It does not include the trailing semicolon (for non array reference types).
 	 * Some examples: Ljava/lang/String, I, [I
-     */
+	 */
 	@Nullable
 	protected volatile String exitTypeDescriptor;
 
@@ -83,8 +85,8 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 
 
 	/**
-     * Return {@code true} if the next child is one of the specified classes.
-     */
+	 * Return {@code true} if the next child is one of the specified classes.
+	 */
 	protected boolean nextChildIs(Class<?>... classes) {
 		if (this.parent != null) {
 			SpelNodeImpl[] peers = this.parent.children;
@@ -125,6 +127,28 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 
 	@Override
 	public void setValue(ExpressionState expressionState, @Nullable Object newValue) throws EvaluationException {
+		setValueInternal(expressionState, () -> new TypedValue(newValue));
+	}
+
+	/**
+	 * Evaluate the expression to a node and then set the new value created by the
+	 * specified {@link Supplier} on that node.
+	 * <p>For example, if the expression evaluates to a property reference, then the
+	 * property will be set to the new value.
+	 * <p>Favor this method over {@link #setValue(ExpressionState, Object)} when
+	 * the value should be lazily computed.
+	 * <p>By default, this method throws a {@link SpelEvaluationException},
+	 * effectively disabling this feature. Subclasses may override this method to
+	 * provide an actual implementation.
+	 * @param expressionState the current expression state (includes the context)
+	 * @param valueSupplier a supplier of the new value
+	 * @throws EvaluationException if any problem occurs evaluating the expression or
+	 * setting the new value
+	 * @since 5.2.24
+	 */
+	public TypedValue setValueInternal(ExpressionState expressionState, Supplier<TypedValue> valueSupplier)
+			throws EvaluationException {
+
 		throw new SpelEvaluationException(getStartPosition(), SpelMessage.SETVALUE_NOT_SUPPORTED, getClass());
 	}
 

spring-expression/src/main/java/org/springframework/expression/spel/ast/VariableReference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,11 @@
 package org.springframework.expression.spel.ast;
 
 import java.lang.reflect.Modifier;
+import java.util.function.Supplier;
 
 import org.springframework.asm.MethodVisitor;
 import org.springframework.expression.EvaluationContext;
+import org.springframework.expression.EvaluationException;
 import org.springframework.expression.TypedValue;
 import org.springframework.expression.spel.CodeFlow;
 import org.springframework.expression.spel.ExpressionState;
@@ -27,10 +29,11 @@ import org.springframework.expression.spel.SpelEvaluationException;
 import org.springframework.lang.Nullable;
 
 /**
- * Represents a variable reference, eg. #someVar. Note this is different to a *local*
- * variable like $someVar
+ * Represents a variable reference — for example, {@code #someVar}. Note
+ * that this is different than a <em>local</em> variable like {@code $someVar}.
  *
  * @author Andy Clement
+ * @author Sam Brannen
  * @since 3.0
  */
 public class VariableReference extends SpelNodeImpl {
@@ -53,14 +56,14 @@ public class VariableReference extends SpelNodeImpl {
 	@Override
 	public ValueRef getValueRef(ExpressionState state) throws SpelEvaluationException {
 		if (this.name.equals(THIS)) {
-			return new ValueRef.TypedValueHolderValueRef(state.getActiveContextObject(),this);
+			return new ValueRef.TypedValueHolderValueRef(state.getActiveContextObject(), this);
 		}
 		if (this.name.equals(ROOT)) {
-			return new ValueRef.TypedValueHolderValueRef(state.getRootContextObject(),this);
+			return new ValueRef.TypedValueHolderValueRef(state.getRootContextObject(), this);
 		}
 		TypedValue result = state.lookupVariable(this.name);
 		// a null value will mean either the value was null or the variable was not found
-		return new VariableRef(this.name,result,state.getEvaluationContext());
+		return new VariableRef(this.name, result, state.getEvaluationContext());
 	}
 
 	@Override
@@ -90,8 +93,10 @@ public class VariableReference extends SpelNodeImpl {
 	}
 
 	@Override
-	public void setValue(ExpressionState state, @Nullable Object value) throws SpelEvaluationException {
-		state.setVariable(this.name, value);
+	public TypedValue setValueInternal(ExpressionState state, Supplier<TypedValue> valueSupplier)
+			throws EvaluationException {
+
+		return state.assignVariable(this.name, valueSupplier);
 	}
 
 	@Override

spring-expression/src/main/java/org/springframework/expression/spel/standard/InternalSpelExpressionParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,12 +21,15 @@ import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Deque;
 import java.util.List;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
 import java.util.regex.Pattern;
 
 import org.springframework.expression.ParseException;
 import org.springframework.expression.ParserContext;
 import org.springframework.expression.common.TemplateAwareExpressionParser;
 import org.springframework.expression.spel.InternalParseException;
+import org.springframework.expression.spel.SpelEvaluationException;
 import org.springframework.expression.spel.SpelMessage;
 import org.springframework.expression.spel.SpelParseException;
 import org.springframework.expression.spel.SpelParserConfiguration;
@@ -83,18 +86,28 @@ import org.springframework.util.StringUtils;
  * @author Andy Clement
  * @author Juergen Hoeller
  * @author Phillip Webb
+ * @author Sam Brannen
  * @since 3.0
  */
 class InternalSpelExpressionParser extends TemplateAwareExpressionParser {
 
 	private static final Pattern VALID_QUALIFIED_ID_PATTERN = Pattern.compile("[\\p{L}\\p{N}_$]+");
 
+	/**
+	 * Maximum length permitted for a SpEL expression.
+	 * @since 5.2.24
+	 */
+	private static final int MAX_EXPRESSION_LENGTH = 10_000;
+
 
 	private final SpelParserConfiguration configuration;
 
 	// For rules that build nodes, they are stacked here for return
 	private final Deque<SpelNodeImpl> constructedNodes = new ArrayDeque<>();
 
+	// Shared cache for compiled regex patterns
+	private final ConcurrentMap<String, Pattern> patternCache = new ConcurrentHashMap<>();
+
 	// The expression being parsed
 	private String expressionString = "";
 
@@ -121,6 +134,8 @@ class InternalSpelExpressionParser extends TemplateAwareExpressionParser {
 	protected SpelExpression doParseExpression(String expressionString, @Nullable ParserContext context)
 			throws ParseException {
 
+		checkExpressionLength(expressionString);
+
 		try {
 			this.expressionString = expressionString;
 			Tokenizer tokenizer = new Tokenizer(expressionString);
@@ -142,6 +157,12 @@ class InternalSpelExpressionParser extends TemplateAwareExpressionParser {
 		}
 	}
 
+	private void checkExpressionLength(String string) {
+		if (string.length() > MAX_EXPRESSION_LENGTH) {
+			throw new SpelEvaluationException(SpelMessage.MAX_EXPRESSION_LENGTH_EXCEEDED, MAX_EXPRESSION_LENGTH);
+		}
+	}
+
 	//	expression
 	//    : logicalOrExpression
 	//      ( (ASSIGN^ logicalOrExpression)
@@ -248,7 +269,7 @@ class InternalSpelExpressionParser extends TemplateAwareExpressionParser {
 			}
 
 			if (tk == TokenKind.MATCHES) {
-				return new OperatorMatches(t.startPos, t.endPos, expr, rhExpr);
+				return new OperatorMatches(this.patternCache, t.startPos, t.endPos, expr, rhExpr);
 			}
 
 			Assert.isTrue(tk == TokenKind.BETWEEN, "Between token expected");

spring-expression/src/main/java/org/springframework/expression/spel/support/ReflectiveMethodResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,6 +48,7 @@ import org.springframework.lang.Nullable;
  * @author Andy Clement
  * @author Juergen Hoeller
  * @author Chris Beams
+ * @author Sam Brannen
  * @since 3.0
  * @see StandardEvaluationContext#addMethodResolver(MethodResolver)
  */
@@ -225,8 +226,7 @@ public class ReflectiveMethodResolver implements MethodResolver {
 		if (targetObject instanceof Class) {
 			Set<Method> result = new LinkedHashSet<>();
 			// Add these so that static methods are invocable on the type: e.g. Float.valueOf(..)
-			Method[] methods = getMethods(type);
-			for (Method method : methods) {
+			for (Method method : getMethods(type)) {
 				if (Modifier.isStatic(method.getModifiers())) {
 					result.add(method);
 				}
@@ -239,19 +239,23 @@ public class ReflectiveMethodResolver implements MethodResolver {
 			Set<Method> result = new LinkedHashSet<>();
 			// Expose interface methods (not proxy-declared overrides) for proper vararg introspection
 			for (Class<?> ifc : type.getInterfaces()) {
-				Method[] methods = getMethods(ifc);
-				for (Method method : methods) {
+				for (Method method : getMethods(ifc)) {
 					if (isCandidateForInvocation(method, type)) {
 						result.add(method);
 					}
 				}
 			}
+			// Ensure methods defined in java.lang.Object are exposed for JDK proxies.
+			for (Method method : getMethods(Object.class)) {
+				if (isCandidateForInvocation(method, type)) {
+					result.add(method);
+				}
+			}
 			return result;
 		}
 		else {
 			Set<Method> result = new LinkedHashSet<>();
-			Method[] methods = getMethods(type);
-			for (Method method : methods) {
+			for (Method method : getMethods(type)) {
 				if (isCandidateForInvocation(method, type)) {
 					result.add(method);
 				}
@@ -276,7 +280,7 @@ public class ReflectiveMethodResolver implements MethodResolver {
 	 * Determine whether the given {@code Method} is a candidate for method resolution
 	 * on an instance of the given target class.
 	 * <p>The default implementation considers any method as a candidate, even for
-	 * static methods sand non-user-declared methods on the {@link Object} base class.
+	 * static methods and non-user-declared methods on the {@link Object} base class.
 	 * @param method the Method to evaluate
 	 * @param targetClass the concrete target class that is being introspected
 	 * @since 4.3.15

spring-expression/src/main/java/org/springframework/expression/spel/support/SimpleEvaluationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.function.Supplier;
 
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.TypeDescriptor;
@@ -78,6 +79,7 @@ import org.springframework.lang.Nullable;
  *
  * @author Rossen Stoyanchev
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 4.3.15
  * @see #forPropertyAccessors
  * @see #forReadOnlyDataBinding()
@@ -200,6 +202,17 @@ public final class SimpleEvaluationContext implements EvaluationContext {
 		return this.operatorOverloader;
 	}
 
+	/**
+	 * {@code SimpleEvaluationContext} does not support variable assignment within
+	 * expressions.
+	 * @throws SpelEvaluationException with {@link SpelMessage#VARIABLE_ASSIGNMENT_NOT_SUPPORTED}
+	 * @since 5.2.24
+	 */
+	@Override
+	public TypedValue assignVariable(String name, Supplier<TypedValue> valueSupplier) {
+		throw new SpelEvaluationException(SpelMessage.VARIABLE_ASSIGNMENT_NOT_SUPPORTED, "#" + name);
+	}
+
 	@Override
 	public void setVariable(String name, @Nullable Object value) {
 		this.variables.put(name, value);

spring-expression/src/test/java/org/springframework/expression/spel/AbstractExpressionTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,7 +35,7 @@ import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  */
 public abstract class AbstractExpressionTests {
 
-	private static final boolean DEBUG = false;
+	protected static final boolean DEBUG = false;
 
 	protected static final boolean SHOULD_BE_WRITABLE = true;
 
@@ -202,7 +202,9 @@ public abstract class AbstractExpressionTests {
 	protected void parseAndCheckError(String expression, SpelMessage expectedMessage, Object... otherProperties) {
 		assertThatExceptionOfType(SpelParseException.class).isThrownBy(() -> {
 			Expression expr = parser.parseExpression(expression);
-			SpelUtilities.printAbstractSyntaxTree(System.out, expr);
+			if (DEBUG) {
+				SpelUtilities.printAbstractSyntaxTree(System.out, expr);
+			}
 		}).satisfies(ex -> {
 			assertThat(ex.getMessageCode()).isEqualTo(expectedMessage);
 			if (otherProperties != null && otherProperties.length != 0) {

spring-expression/src/test/java/org/springframework/expression/spel/EvaluationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,8 @@ import java.util.Map;
 
 import org.junit.jupiter.api.Nested;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
 
 import org.springframework.expression.AccessException;
 import org.springframework.expression.BeanResolver;
@@ -36,6 +38,7 @@ import org.springframework.expression.MethodFilter;
 import org.springframework.expression.ParseException;
 import org.springframework.expression.spel.standard.SpelExpression;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
+import org.springframework.expression.spel.support.SimpleEvaluationContext;
 import org.springframework.expression.spel.support.StandardEvaluationContext;
 import org.springframework.expression.spel.support.StandardTypeLocator;
 import org.springframework.expression.spel.testresources.TestPerson;
@@ -60,6 +63,20 @@ class EvaluationTests extends AbstractExpressionTests {
 	@Nested
 	class MiscellaneousTests {
 
+		@Test
+		void expressionLength() {
+			String expression = String.format("'X' + '%s'", repeat(" ", 9_992));
+			assertThat(expression).hasSize(10_000);
+			Expression expr = parser.parseExpression(expression);
+			String result = expr.getValue(context, String.class);
+			assertThat(result).hasSize(9_993);
+			assertThat(result.trim()).isEqualTo("X");
+
+			expression = String.format("'X' + '%s'", repeat(" ", 9_993));
+			assertThat(expression).hasSize(10_001);
+			evaluateAndCheckError(expression, String.class, SpelMessage.MAX_EXPRESSION_LENGTH_EXCEEDED);
+		}
+
 		@Test
 		void createListsOnAttemptToIndexNull01() throws EvaluationException, ParseException {
 			ExpressionParser parser = new SpelExpressionParser(new SpelParserConfiguration(true, true));
@@ -127,17 +144,6 @@ class EvaluationTests extends AbstractExpressionTests {
 			evaluate("null?.null?.null", null, null);
 		}
 
-		@Test  // SPR-16731
-		void matchesWithPatternAccessThreshold() {
-			String pattern = "^(?=[a-z0-9-]{1,47})([a-z0-9]+[-]{0,1}){1,47}[a-z0-9]{1}$";
-			String expression = "'abcde-fghijklmn-o42pasdfasdfasdf.qrstuvwxyz10x.xx.yyy.zasdfasfd' matches \'" + pattern + "\'";
-			Expression expr = parser.parseExpression(expression);
-			assertThatExceptionOfType(SpelEvaluationException.class)
-			.isThrownBy(expr::getValue)
-			.withCauseInstanceOf(IllegalStateException.class)
-			.satisfies(ex -> assertThat(ex.getMessageCode()).isEqualTo(SpelMessage.FLAWED_PATTERN));
-		}
-
 		// mixing operators
 		@Test
 		void mixingOperators() {
@@ -146,8 +152,24 @@ class EvaluationTests extends AbstractExpressionTests {
 
 		// assignment
 		@Test
-		void assignmentToVariables() {
-			evaluate("#var1='value1'", "value1", String.class);
+		void assignmentToVariableWithStandardEvaluationContext() {
+			evaluate("#var1 = 'value1'", "value1", String.class);
+		}
+
+		@ParameterizedTest
+		@CsvSource(delimiterString = "->", value = {
+			"'#var1 = \"value1\"'    -> #var1",
+			"'true ? #myVar = 4 : 0' -> #myVar"
+		})
+		void assignmentToVariableWithSimpleEvaluationContext(String expression, String varName) {
+			EvaluationContext context = SimpleEvaluationContext.forReadWriteDataBinding().build();
+			Expression expr = parser.parseExpression(expression);
+			assertThatExceptionOfType(SpelEvaluationException.class)
+				.isThrownBy(() -> expr.getValue(context))
+				.satisfies(ex -> {
+					assertThat(ex.getMessageCode()).isEqualTo(SpelMessage.VARIABLE_ASSIGNMENT_NOT_SUPPORTED);
+					assertThat(ex.getInserts()).as("inserts").containsExactly(varName);
+				});
 		}
 
 		@Test
@@ -460,28 +482,47 @@ class EvaluationTests extends AbstractExpressionTests {
 		}
 
 		@Test
-		void relOperatorsMatches01() {
-			evaluate("'5.0067' matches '^-?\\d+(\\.\\d{2})?$'", "false", Boolean.class);
-		}
-
-		@Test
-		void relOperatorsMatches02() {
+		void matchesTrue() {
 			evaluate("'5.00' matches '^-?\\d+(\\.\\d{2})?$'", "true", Boolean.class);
 		}
 
 		@Test
-		void relOperatorsMatches03() {
+		void matchesFalse() {
+			evaluate("'5.0067' matches '^-?\\d+(\\.\\d{2})?$'", "false", Boolean.class);
+		}
+
+		@Test
+		void matchesWithInputConversion() {
+			evaluate("27 matches '^.*2.*$'", true, Boolean.class);  // conversion int --> string
+		}
+
+		@Test
+		void matchesWithNullInput() {
 			evaluateAndCheckError("null matches '^.*$'", SpelMessage.INVALID_FIRST_OPERAND_FOR_MATCHES_OPERATOR, 0, null);
 		}
 
 		@Test
-		void relOperatorsMatches04() {
+		void matchesWithNullPattern() {
 			evaluateAndCheckError("'abc' matches null", SpelMessage.INVALID_SECOND_OPERAND_FOR_MATCHES_OPERATOR, 14, null);
 		}
 
+		@Test  // SPR-16731
+		void matchesWithPatternAccessThreshold() {
+			String pattern = "^(?=[a-z0-9-]{1,47})([a-z0-9]+[-]{0,1}){1,47}[a-z0-9]{1}$";
+			String expression = "'abcde-fghijklmn-o42pasdfasdfasdf.qrstuvwxyz10x.xx.yyy.zasdfasfd' matches '" + pattern + "'";
+			evaluateAndCheckError(expression, SpelMessage.FLAWED_PATTERN);
+		}
+
 		@Test
-		void relOperatorsMatches05() {
-			evaluate("27 matches '^.*2.*$'", true, Boolean.class);  // conversion int>string
+		void matchesWithPatternLengthThreshold() {
+			String pattern = String.format("^(%s|X)", repeat("12345", 199));
+			assertThat(pattern).hasSize(1000);
+			Expression expr = parser.parseExpression("'X' matches '" + pattern + "'");
+			assertThat(expr.getValue(context, Boolean.class)).isTrue();
+
+			pattern += "?";
+			assertThat(pattern).hasSize(1001);
+			evaluateAndCheckError("'abc' matches '" + pattern + "'", Boolean.class, SpelMessage.MAX_REGEX_LENGTH_EXCEEDED);
 		}
 
 	}
@@ -1448,7 +1489,9 @@ class EvaluationTests extends AbstractExpressionTests {
 		private void expectFail(ExpressionParser parser, EvaluationContext eContext, String expressionString, SpelMessage messageCode) {
 			assertThatExceptionOfType(SpelEvaluationException.class).isThrownBy(() -> {
 				Expression e = parser.parseExpression(expressionString);
-				SpelUtilities.printAbstractSyntaxTree(System.out, e);
+				if (DEBUG) {
+					SpelUtilities.printAbstractSyntaxTree(System.out, e);
+				}
 				e.getValue(eContext);
 			}).satisfies(ex -> assertThat(ex.getMessageCode()).isEqualTo(messageCode));
 		}
@@ -1456,6 +1499,15 @@ class EvaluationTests extends AbstractExpressionTests {
 	}
 
 
+	private static String repeat(String str, int count) {
+		String result = "";
+		for (int i = 0; i < count; i++) {
+			result += str;
+		}
+		return result;
+	}
+
+
 	@SuppressWarnings("rawtypes")
 	static class TestClass {
 

spring-expression/src/test/java/org/springframework/expression/spel/OperatorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,22 +21,26 @@ import java.math.BigInteger;
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.expression.Expression;
 import org.springframework.expression.spel.ast.Operator;
 import org.springframework.expression.spel.standard.SpelExpression;
 
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.springframework.expression.spel.SpelMessage.MAX_CONCATENATED_STRING_LENGTH_EXCEEDED;
+import static org.springframework.expression.spel.SpelMessage.MAX_REPEATED_TEXT_SIZE_EXCEEDED;
 
 /**
- * Tests the evaluation of expressions using relational operators.
+ * Tests the evaluation of expressions using various operators.
  *
  * @author Andy Clement
  * @author Juergen Hoeller
  * @author Giovanni Dall'Oglio Risso
+ * @author Sam Brannen
  */
 class OperatorTests extends AbstractExpressionTests {
 
 	@Test
-	void testEqual() {
+	void equal() {
 		evaluate("3 == 5", false, Boolean.class);
 		evaluate("5 == 3", false, Boolean.class);
 		evaluate("6 == 6", true, Boolean.class);
@@ -85,7 +89,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testNotEqual() {
+	void notEqual() {
 		evaluate("3 != 5", true, Boolean.class);
 		evaluate("5 != 3", true, Boolean.class);
 		evaluate("6 != 6", false, Boolean.class);
@@ -134,7 +138,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testLessThan() {
+	void lessThan() {
 		evaluate("5 < 5", false, Boolean.class);
 		evaluate("3 < 5", true, Boolean.class);
 		evaluate("5 < 3", false, Boolean.class);
@@ -176,7 +180,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testLessThanOrEqual() {
+	void lessThanOrEqual() {
 		evaluate("3 <= 5", true, Boolean.class);
 		evaluate("5 <= 3", false, Boolean.class);
 		evaluate("6 <= 6", true, Boolean.class);
@@ -225,7 +229,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testGreaterThan() {
+	void greaterThan() {
 		evaluate("3 > 5", false, Boolean.class);
 		evaluate("5 > 3", true, Boolean.class);
 		evaluate("3L > 5L", false, Boolean.class);
@@ -266,7 +270,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testGreaterThanOrEqual() {
+	void greaterThanOrEqual() {
 		evaluate("3 >= 5", false, Boolean.class);
 		evaluate("5 >= 3", true, Boolean.class);
 		evaluate("6 >= 6", true, Boolean.class);
@@ -315,27 +319,22 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testIntegerLiteral() {
+	void integerLiteral() {
 		evaluate("3", 3, Integer.class);
 	}
 
 	@Test
-	void testRealLiteral() {
+	void realLiteral() {
 		evaluate("3.5", 3.5d, Double.class);
 	}
 
 	@Test
-	void testMultiplyStringInt() {
-		evaluate("'a' * 5", "aaaaa", String.class);
-	}
-
-	@Test
-	void testMultiplyDoubleDoubleGivesDouble() {
+	void multiplyDoubleDoubleGivesDouble() {
 		evaluate("3.0d * 5.0d", 15.0d, Double.class);
 	}
 
 	@Test
-	void testMixedOperandsBigDecimal() {
+	void mixedOperandsBigDecimal() {
 		evaluate("3 * new java.math.BigDecimal('5')", new BigDecimal("15"), BigDecimal.class);
 		evaluate("3L * new java.math.BigDecimal('5')", new BigDecimal("15"), BigDecimal.class);
 		evaluate("3.0d * new java.math.BigDecimal('5')", new BigDecimal("15.0"), BigDecimal.class);
@@ -361,19 +360,19 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testMathOperatorAdd02() {
+	void mathOperatorAdd02() {
 		evaluate("'hello' + ' ' + 'world'", "hello world", String.class);
 	}
 
 	@Test
-	void testMathOperatorsInChains() {
+	void mathOperatorsInChains() {
 		evaluate("1+2+3",6,Integer.class);
 		evaluate("2*3*4",24,Integer.class);
 		evaluate("12-1-2",9,Integer.class);
 	}
 
 	@Test
-	void testIntegerArithmetic() {
+	void integerArithmetic() {
 		evaluate("2 + 4", "6", Integer.class);
 		evaluate("5 - 4", "1", Integer.class);
 		evaluate("3 * 5", 15, Integer.class);
@@ -388,56 +387,47 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testPlus() {
+	void plus() {
 		evaluate("7 + 2", "9", Integer.class);
 		evaluate("3.0f + 5.0f", 8.0f, Float.class);
 		evaluate("3.0d + 5.0d", 8.0d, Double.class);
 		evaluate("3 + new java.math.BigDecimal('5')", new BigDecimal("8"), BigDecimal.class);
-
-		evaluate("'ab' + 2", "ab2", String.class);
-		evaluate("2 + 'a'", "2a", String.class);
-		evaluate("'ab' + null", "abnull", String.class);
-		evaluate("null + 'ab'", "nullab", String.class);
+		evaluate("5 + new Integer('37')", 42, Integer.class);
 
 		// AST:
-		SpelExpression expr = (SpelExpression)parser.parseExpression("+3");
+		SpelExpression expr = (SpelExpression) parser.parseExpression("+3");
 		assertThat(expr.toStringAST()).isEqualTo("+3");
-		expr = (SpelExpression)parser.parseExpression("2+3");
+		expr = (SpelExpression) parser.parseExpression("2+3");
 		assertThat(expr.toStringAST()).isEqualTo("(2 + 3)");
 
 		// use as a unary operator
-		evaluate("+5d",5d,Double.class);
-		evaluate("+5L",5L,Long.class);
-		evaluate("+5",5,Integer.class);
-		evaluate("+new java.math.BigDecimal('5')", new BigDecimal("5"),BigDecimal.class);
-		evaluateAndCheckError("+'abc'",SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
-
-		// string concatenation
-		evaluate("'abc'+'def'","abcdef",String.class);
-
-		evaluate("5 + new Integer('37')",42,Integer.class);
+		evaluate("+5d", 5d, Double.class);
+		evaluate("+5L", 5L, Long.class);
+		evaluate("+5", 5, Integer.class);
+		evaluate("+new java.math.BigDecimal('5')", new BigDecimal("5"), BigDecimal.class);
+		evaluateAndCheckError("+'abc'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
 	}
 
 	@Test
-	void testMinus() {
+	void minus() {
 		evaluate("'c' - 2", "a", String.class);
 		evaluate("3.0f - 5.0f", -2.0f, Float.class);
 		evaluateAndCheckError("'ab' - 2", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
 		evaluateAndCheckError("2-'ab'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
-		SpelExpression expr = (SpelExpression)parser.parseExpression("-3");
+		SpelExpression expr = (SpelExpression) parser.parseExpression("-3");
 		assertThat(expr.toStringAST()).isEqualTo("-3");
-		expr = (SpelExpression)parser.parseExpression("2-3");
+		expr = (SpelExpression) parser.parseExpression("2-3");
 		assertThat(expr.toStringAST()).isEqualTo("(2 - 3)");
 
-		evaluate("-5d",-5d,Double.class);
-		evaluate("-5L",-5L,Long.class);
+		evaluate("-5d", -5d, Double.class);
+		evaluate("-5L", -5L, Long.class);
 		evaluate("-5", -5, Integer.class);
-		evaluate("-new java.math.BigDecimal('5')", new BigDecimal("-5"),BigDecimal.class);
+		evaluate("-new java.math.BigDecimal('5')", new BigDecimal("-5"), BigDecimal.class);
 		evaluateAndCheckError("-'abc'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
 	}
 
 	@Test
-	void testModulus() {
+	void modulus() {
 		evaluate("3%2",1,Integer.class);
 		evaluate("3L%2L",1L,Long.class);
 		evaluate("3.0f%2.0f",1f,Float.class);
@@ -448,7 +438,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testDivide() {
+	void divide() {
 		evaluate("3.0f / 5.0f", 0.6f, Float.class);
 		evaluate("4L/2L",2L,Long.class);
 		evaluate("3.0f div 5.0f", 0.6f, Float.class);
@@ -461,17 +451,17 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testMathOperatorDivide_ConvertToDouble() {
+	void mathOperatorDivide_ConvertToDouble() {
 		evaluateAndAskForReturnType("8/4", 2.0, Double.class);
 	}
 
 	@Test
-	void testMathOperatorDivide04_ConvertToFloat() {
+	void mathOperatorDivide04_ConvertToFloat() {
 		evaluateAndAskForReturnType("8/4", 2.0F, Float.class);
 	}
 
 	@Test
-	void testDoubles() {
+	void doubles() {
 		evaluate("3.0d == 5.0d", false, Boolean.class);
 		evaluate("3.0d == 3.0d", true, Boolean.class);
 		evaluate("3.0d != 5.0d", true, Boolean.class);
@@ -484,7 +474,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testBigDecimals() {
+	void bigDecimals() {
 		evaluate("3 + new java.math.BigDecimal('5')", new BigDecimal("8"), BigDecimal.class);
 		evaluate("3 - new java.math.BigDecimal('5')", new BigDecimal("-2"), BigDecimal.class);
 		evaluate("3 * new java.math.BigDecimal('5')", new BigDecimal("15"), BigDecimal.class);
@@ -495,7 +485,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testOperatorNames() {
+	void operatorNames() {
 		Operator node = getOperatorNode((SpelExpression)parser.parseExpression("1==3"));
 		assertThat(node.getOperatorName()).isEqualTo("==");
 
@@ -534,22 +524,22 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testOperatorOverloading() {
+	void operatorOverloading() {
 		evaluateAndCheckError("'a' * '2'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
 		evaluateAndCheckError("'a' ^ '2'", SpelMessage.OPERATOR_NOT_SUPPORTED_BETWEEN_TYPES);
 	}
 
 	@Test
-	void testPower() {
-		evaluate("3^2",9,Integer.class);
-		evaluate("3.0d^2.0d",9.0d,Double.class);
-		evaluate("3L^2L",9L,Long.class);
+	void power() {
+		evaluate("3^2", 9, Integer.class);
+		evaluate("3.0d^2.0d", 9.0d, Double.class);
+		evaluate("3L^2L", 9L, Long.class);
 		evaluate("(2^32)^2", 9223372036854775807L, Long.class);
 		evaluate("new java.math.BigDecimal('5') ^ 3", new BigDecimal("125"), BigDecimal.class);
 	}
 
 	@Test
-	void testMixedOperands_FloatsAndDoubles() {
+	void mixedOperands_FloatsAndDoubles() {
 		evaluate("3.0d + 5.0f", 8.0d, Double.class);
 		evaluate("3.0D - 5.0f", -2.0d, Double.class);
 		evaluate("3.0f * 5.0d", 15.0d, Double.class);
@@ -558,7 +548,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testMixedOperands_DoublesAndInts() {
+	void mixedOperands_DoublesAndInts() {
 		evaluate("3.0d + 5", 8.0d, Double.class);
 		evaluate("3.0D - 5", -2.0d, Double.class);
 		evaluate("3.0f * 5", 15.0f, Float.class);
@@ -569,7 +559,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testStrings() {
+	void strings() {
 		evaluate("'abc' == 'abc'", true, Boolean.class);
 		evaluate("'abc' == 'def'", false, Boolean.class);
 		evaluate("'abc' != 'abc'", false, Boolean.class);
@@ -577,7 +567,73 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testLongs() {
+	void stringRepeat() {
+		evaluate("'abc' * 0", "", String.class);
+		evaluate("'abc' * 1", "abc", String.class);
+		evaluate("'abc' * 2", "abcabc", String.class);
+
+		Expression expr = parser.parseExpression("'a' * 256");
+		assertThat(expr.getValue(context, String.class)).hasSize(256);
+
+		// 4 is the position of the '*' (repeat operator)
+		evaluateAndCheckError("'a' * 257", String.class, MAX_REPEATED_TEXT_SIZE_EXCEEDED, 4);
+	}
+
+	@Test
+	void stringConcatenation() {
+		evaluate("'' + ''", "", String.class);
+		evaluate("'' + null", "null", String.class);
+		evaluate("null + ''", "null", String.class);
+		evaluate("'ab' + null", "abnull", String.class);
+		evaluate("null + 'ab'", "nullab", String.class);
+		evaluate("'ab' + 2", "ab2", String.class);
+		evaluate("2 + 'ab'", "2ab", String.class);
+		evaluate("'abc' + 'def'", "abcdef", String.class);
+
+		// Text is big but not too big
+		final int maxSize = 100_000;
+		context.setVariable("text1", createString(maxSize));
+		Expression expr = parser.parseExpression("#text1 + ''");
+		assertThat(expr.getValue(context, String.class)).hasSize(maxSize);
+
+		expr = parser.parseExpression("'' + #text1");
+		assertThat(expr.getValue(context, String.class)).hasSize(maxSize);
+
+		context.setVariable("text1", createString(maxSize / 2));
+		expr = parser.parseExpression("#text1 + #text1");
+		assertThat(expr.getValue(context, String.class)).hasSize(maxSize);
+
+		// Text is too big
+		context.setVariable("text1", createString(maxSize + 1));
+		evaluateAndCheckError("#text1 + ''", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+		evaluateAndCheckError("#text1 + true", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+		evaluateAndCheckError("'' + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 3);
+		evaluateAndCheckError("true + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 5);
+
+		context.setVariable("text1", createString(maxSize / 2));
+		context.setVariable("text2", createString((maxSize / 2) + 1));
+		evaluateAndCheckError("#text1 + #text2", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+		evaluateAndCheckError("#text1 + #text2 + true", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+		evaluateAndCheckError("#text1 + true + #text2", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 14);
+		evaluateAndCheckError("true + #text1 + #text2", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 14);
+
+		evaluateAndCheckError("#text2 + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+		evaluateAndCheckError("#text2 + #text1 + true", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+		evaluateAndCheckError("#text2 + true + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 14);
+		evaluateAndCheckError("true + #text2 + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 14);
+
+		context.setVariable("text1", createString((maxSize / 3) + 1));
+		evaluateAndCheckError("#text1 + #text1 + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 16);
+		evaluateAndCheckError("(#text1 + #text1) + #text1", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 18);
+		evaluateAndCheckError("#text1 + (#text1 + #text1)", String.class, MAX_CONCATENATED_STRING_LENGTH_EXCEEDED, 7);
+	}
+
+	private static String createString(int size) {
+		return new String(new char[size]);
+	}
+
+	@Test
+	void longs() {
 		evaluate("3L == 4L", false, Boolean.class);
 		evaluate("3L == 3L", true, Boolean.class);
 		evaluate("3L != 4L", true, Boolean.class);
@@ -588,7 +644,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 	@Test
-	void testBigIntegers() {
+	void bigIntegers() {
 		evaluate("3 + new java.math.BigInteger('5')", new BigInteger("8"), BigInteger.class);
 		evaluate("3 - new java.math.BigInteger('5')", new BigInteger("-2"), BigInteger.class);
 		evaluate("3 * new java.math.BigInteger('5')", new BigInteger("15"), BigInteger.class);
@@ -619,7 +675,7 @@ class OperatorTests extends AbstractExpressionTests {
 	}
 
 
-	public static class BaseComparable implements Comparable<BaseComparable> {
+	static class BaseComparable implements Comparable<BaseComparable> {
 
 		@Override
 		public int compareTo(BaseComparable other) {

spring-expression/src/test/java/org/springframework/expression/spel/SpelReproTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1817,7 +1817,6 @@ class SpelReproTests extends AbstractExpressionTests {
 	static class CCC {
 
 		public boolean method(Object o) {
-			System.out.println(o);
 			return false;
 		}
 	}
@@ -1889,7 +1888,6 @@ class SpelReproTests extends AbstractExpressionTests {
 	static class Foo2 {
 
 		public void execute(String str) {
-			System.out.println("Value: " + str);
 		}
 	}
 
@@ -1964,7 +1962,6 @@ class SpelReproTests extends AbstractExpressionTests {
 	public static class ReflectionUtil<T extends Number> {
 
 		public Object methodToCall(T param) {
-			System.out.println(param + " " + param.getClass());
 			return "Object methodToCall(T param)";
 		}
 

spring-expression/src/test/java/org/springframework/expression/spel/support/ReflectionHelperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,13 +19,17 @@ package org.springframework.expression.spel.support;
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import org.junit.jupiter.api.Test;
 
 import org.springframework.core.convert.TypeDescriptor;
 import org.springframework.expression.EvaluationContext;
+import org.springframework.expression.MethodExecutor;
+import org.springframework.expression.MethodResolver;
 import org.springframework.expression.ParseException;
 import org.springframework.expression.PropertyAccessor;
 import org.springframework.expression.TypedValue;
@@ -364,6 +368,20 @@ public class ReflectionHelperTests extends AbstractExpressionTests {
 				field.write(ctx, tester, "field", null));
 	}
 
+	@Test
+	void reflectiveMethodResolverForJdkProxies() throws Exception {
+		Object proxy = Proxy.newProxyInstance(getClass().getClassLoader(), new Class<?>[] { Runnable.class }, (p, m, args) -> null);
+
+		MethodResolver resolver = new ReflectiveMethodResolver();
+		StandardEvaluationContext evaluationContext = new StandardEvaluationContext();
+
+		MethodExecutor bogus = resolver.resolve(evaluationContext, proxy, "bogus", Collections.emptyList());
+		assertThat(bogus).as("MethodExecutor for bogus()").isNull();
+		MethodExecutor toString = resolver.resolve(evaluationContext, proxy, "toString", Collections.emptyList());
+		assertThat(toString).as("MethodExecutor for toString()").isNotNull();
+		MethodExecutor hashCode = resolver.resolve(evaluationContext, proxy, "hashCode", Collections.emptyList());
+		assertThat(hashCode).as("MethodExecutor for hashCode()").isNotNull();
+	}
 
 	/**
 	 * Used to validate the match returned from a compareArguments call.

spring-jdbc/src/main/java/org/springframework/jdbc/core/BeanPropertyRowMapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,31 +48,42 @@ import org.springframework.util.StringUtils;
 /**
  * {@link RowMapper} implementation that converts a row into a new instance
  * of the specified mapped target class. The mapped target class must be a
- * top-level class and it must have a default or no-arg constructor.
+ * top-level class or {@code static} nested class, and it must have a default or
+ * no-arg constructor.
  *
- * <p>Column values are mapped based on matching the column name as obtained from result set
- * meta-data to public setters for the corresponding properties. The names are matched either
- * directly or by transforming a name separating the parts with underscores to the same name
- * using "camel" case.
+ * <p>Column values are mapped based on matching the column name (as obtained from
+ * result set meta-data) to public setters in the target class for the corresponding
+ * properties. The names are matched either directly or by transforming a name
+ * separating the parts with underscores to the same name using "camel" case.
  *
- * <p>Mapping is provided for fields in the target class for many common types, e.g.:
- * String, boolean, Boolean, byte, Byte, short, Short, int, Integer, long, Long,
- * float, Float, double, Double, BigDecimal, {@code java.util.Date}, etc.
+ * <p>Mapping is provided for properties in the target class for many common types &mdash;
+ * for example: String, boolean, Boolean, byte, Byte, short, Short, int, Integer,
+ * long, Long, float, Float, double, Double, BigDecimal, {@code java.util.Date}, etc.
  *
- * <p>To facilitate mapping between columns and fields that don't have matching names,
- * try using column aliases in the SQL statement like "select fname as first_name from customer".
+ * <p>To facilitate mapping between columns and properties that don't have matching
+ * names, try using column aliases in the SQL statement like
+ * {@code "select fname as first_name from customer"}, where {@code first_name}
+ * can be mapped to a {@code setFirstName(String)} method in the target class.
  *
- * <p>For 'null' values read from the database, we will attempt to call the setter, but in the case of
- * Java primitives, this causes a TypeMismatchException. This class can be configured (using the
- * primitivesDefaultedForNullValue property) to trap this exception and use the primitives default value.
- * Be aware that if you use the values from the generated bean to update the database the primitive value
- * will have been set to the primitive's default value instead of null.
+ * <p>For a {@code NULL} value read from the database, an attempt will be made to
+ * call the corresponding setter method with {@code null}, but in the case of
+ * Java primitives this will result in a {@link TypeMismatchException} by default.
+ * To ignore {@code NULL} database values for all primitive properties in the
+ * target class, set the {@code primitivesDefaultedForNullValue} flag to
+ * {@code true}. See {@link #setPrimitivesDefaultedForNullValue(boolean)} for
+ * details.
  *
- * <p>Please note that this class is designed to provide convenience rather than high performance.
- * For best performance, consider using a custom {@link RowMapper} implementation.
+ * <p>If you need to map to a target class which has a <em>data class</em> constructor
+ * &mdash; for example, a Java {@code record} or a Kotlin {@code data} class &mdash;
+ * use {@link DataClassRowMapper} instead.
+ *
+ * <p>Please note that this class is designed to provide convenience rather than
+ * high performance. For best performance, consider using a custom {@code RowMapper}
+ * implementation.
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 2.5
  * @param <T> the result type
  * @see DataClassRowMapper
@@ -89,20 +100,24 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 	/** Whether we're strictly validating. */
 	private boolean checkFullyPopulated = false;
 
-	/** Whether we're defaulting primitives when mapping a null value. */
+	/**
+	 * Whether {@code NULL} database values should be ignored for primitive
+	 * properties in the target class.
+	 * @see #setPrimitivesDefaultedForNullValue(boolean)
+	 */
 	private boolean primitivesDefaultedForNullValue = false;
 
 	/** ConversionService for binding JDBC values to bean properties. */
 	@Nullable
 	private ConversionService conversionService = DefaultConversionService.getSharedInstance();
 
-	/** Map of the fields we provide mapping for. */
+	/** Map of the properties we provide mapping for. */
 	@Nullable
-	private Map<String, PropertyDescriptor> mappedFields;
+	private Map<String, PropertyDescriptor> mappedProperties;
 
-	/** Set of bean properties we provide mapping for. */
+	/** Set of bean property names we provide mapping for. */
 	@Nullable
-	private Set<String> mappedProperties;
+	private Set<String> mappedPropertyNames;
 
 
 	/**
@@ -126,7 +141,7 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 	 * Create a new {@code BeanPropertyRowMapper}.
 	 * @param mappedClass the class that each row should be mapped to
 	 * @param checkFullyPopulated whether we're strictly validating that
-	 * all bean properties have been mapped from corresponding database fields
+	 * all bean properties have been mapped from corresponding database columns
 	 */
 	public BeanPropertyRowMapper(Class<T> mappedClass, boolean checkFullyPopulated) {
 		initialize(mappedClass);
@@ -159,7 +174,7 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 
 	/**
 	 * Set whether we're strictly validating that all bean properties have been mapped
-	 * from corresponding database fields.
+	 * from corresponding database columns.
 	 * <p>Default is {@code false}, accepting unpopulated properties in the target bean.
 	 */
 	public void setCheckFullyPopulated(boolean checkFullyPopulated) {
@@ -168,24 +183,33 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 
 	/**
 	 * Return whether we're strictly validating that all bean properties have been
-	 * mapped from corresponding database fields.
+	 * mapped from corresponding database columns.
 	 */
 	public boolean isCheckFullyPopulated() {
 		return this.checkFullyPopulated;
 	}
 
 	/**
-	 * Set whether we're defaulting Java primitives in the case of mapping a null value
-	 * from corresponding database fields.
-	 * <p>Default is {@code false}, throwing an exception when nulls are mapped to Java primitives.
+	 * Set whether a {@code NULL} database column value should be ignored when
+	 * mapping to a corresponding primitive property in the target class.
+	 * <p>Default is {@code false}, throwing an exception when nulls are mapped
+	 * to Java primitives.
+	 * <p>If this flag is set to {@code true} and you use an <em>ignored</em>
+	 * primitive property value from the mapped bean to update the database, the
+	 * value in the database will be changed from {@code NULL} to the current value
+	 * of that primitive property. That value may be the property's initial value
+	 * (potentially Java's default value for the respective primitive type), or
+	 * it may be some other value set for the property in the default constructor
+	 * (or initialization block) or as a side effect of setting some other property
+	 * in the mapped bean.
 	 */
 	public void setPrimitivesDefaultedForNullValue(boolean primitivesDefaultedForNullValue) {
 		this.primitivesDefaultedForNullValue = primitivesDefaultedForNullValue;
 	}
 
 	/**
-	 * Return whether we're defaulting Java primitives in the case of mapping a null value
-	 * from corresponding database fields.
+	 * Get the value of the {@code primitivesDefaultedForNullValue} flag.
+	 * @see #setPrimitivesDefaultedForNullValue(boolean)
 	 */
 	public boolean isPrimitivesDefaultedForNullValue() {
 		return this.primitivesDefaultedForNullValue;
@@ -220,31 +244,31 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 	 */
 	protected void initialize(Class<T> mappedClass) {
 		this.mappedClass = mappedClass;
-		this.mappedFields = new HashMap<>();
-		this.mappedProperties = new HashSet<>();
+		this.mappedProperties = new HashMap<>();
+		this.mappedPropertyNames = new HashSet<>();
 
 		for (PropertyDescriptor pd : BeanUtils.getPropertyDescriptors(mappedClass)) {
 			if (pd.getWriteMethod() != null) {
 				String lowerCaseName = lowerCaseName(pd.getName());
-				this.mappedFields.put(lowerCaseName, pd);
+				this.mappedProperties.put(lowerCaseName, pd);
 				String underscoreName = underscoreName(pd.getName());
 				if (!lowerCaseName.equals(underscoreName)) {
-					this.mappedFields.put(underscoreName, pd);
+					this.mappedProperties.put(underscoreName, pd);
 				}
-				this.mappedProperties.add(pd.getName());
+				this.mappedPropertyNames.add(pd.getName());
 			}
 		}
 	}
 
 	/**
-	 * Remove the specified property from the mapped fields.
+	 * Remove the specified property from the mapped properties.
 	 * @param propertyName the property name (as used by property descriptors)
 	 * @since 5.3.9
 	 */
 	protected void suppressProperty(String propertyName) {
-		if (this.mappedFields != null) {
-			this.mappedFields.remove(lowerCaseName(propertyName));
-			this.mappedFields.remove(underscoreName(propertyName));
+		if (this.mappedProperties != null) {
+			this.mappedProperties.remove(lowerCaseName(propertyName));
+			this.mappedProperties.remove(underscoreName(propertyName));
 		}
 	}
 
@@ -306,8 +330,8 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 
 		for (int index = 1; index <= columnCount; index++) {
 			String column = JdbcUtils.lookupColumnName(rsmd, index);
-			String field = lowerCaseName(StringUtils.delete(column, " "));
-			PropertyDescriptor pd = (this.mappedFields != null ? this.mappedFields.get(field) : null);
+			String property = lowerCaseName(StringUtils.delete(column, " "));
+			PropertyDescriptor pd = (this.mappedProperties != null ? this.mappedProperties.get(property) : null);
 			if (pd != null) {
 				try {
 					Object value = getColumnValue(rs, index, pd);
@@ -321,11 +345,11 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 					catch (TypeMismatchException ex) {
 						if (value == null && this.primitivesDefaultedForNullValue) {
 							if (logger.isDebugEnabled()) {
-								logger.debug("Intercepted TypeMismatchException for row " + rowNumber +
-										" and column '" + column + "' with null value when setting property '" +
-										pd.getName() + "' of type '" +
-										ClassUtils.getQualifiedName(pd.getPropertyType()) +
-										"' on object: " + mappedObject, ex);
+								String propertyType = ClassUtils.getQualifiedName(pd.getPropertyType());
+								logger.debug(String.format(
+										"Ignoring intercepted TypeMismatchException for row %d and column '%s' " +
+										"with null value when setting property '%s' of type '%s' on object: %s",
+										rowNumber, column, pd.getName(), propertyType, mappedObject), ex);
 							}
 						}
 						else {
@@ -343,9 +367,9 @@ public class BeanPropertyRowMapper<T> implements RowMapper<T> {
 			}
 		}
 
-		if (populatedProperties != null && !populatedProperties.equals(this.mappedProperties)) {
-			throw new InvalidDataAccessApiUsageException("Given ResultSet does not contain all fields " +
-					"necessary to populate object of " + this.mappedClass + ": " + this.mappedProperties);
+		if (populatedProperties != null && !populatedProperties.equals(this.mappedPropertyNames)) {
+			throw new InvalidDataAccessApiUsageException("Given ResultSet does not contain all properties " +
+					"necessary to populate object of " + this.mappedClass + ": " + this.mappedPropertyNames);
 		}
 
 		return mappedObject;

spring-jdbc/src/main/java/org/springframework/jdbc/core/DataClassRowMapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,15 +31,30 @@ import org.springframework.util.Assert;
 /**
  * {@link RowMapper} implementation that converts a row into a new instance
  * of the specified mapped target class. The mapped target class must be a
- * top-level class and may either expose a data class constructor with named
- * parameters corresponding to column names or classic bean property setters
- * (or even a combination of both).
+ * top-level class or {@code static} nested class, and it may expose either a
+ * <em>data class</em> constructor with named parameters corresponding to column
+ * names or classic bean property setter methods with property names corresponding
+ * to column names (or even a combination of both).
+ *
+ * <p>The term "data class" applies to Java <em>records</em>, Kotlin <em>data
+ * classes</em>, and any class which has a constructor with named parameters
+ * that are intended to be mapped to corresponding column names.
+ *
+ * <p>When combining a data class constructor with setter methods, any property
+ * mapped successfully via a constructor argument will not be mapped additionally
+ * via a corresponding setter method. This means that constructor arguments take
+ * precedence over property setter methods.
  *
  * <p>Note that this class extends {@link BeanPropertyRowMapper} and can
  * therefore serve as a common choice for any mapped target class, flexibly
  * adapting to constructor style versus setter methods in the mapped class.
  *
+ * <p>Please note that this class is designed to provide convenience rather than
+ * high performance. For best performance, consider using a custom {@code RowMapper}
+ * implementation.
+ *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 5.3
  * @param <T> the result type
  */

spring-jdbc/src/main/java/org/springframework/jdbc/core/RowMapper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,21 +24,21 @@ import org.springframework.lang.Nullable;
 /**
  * An interface used by {@link JdbcTemplate} for mapping rows of a
  * {@link java.sql.ResultSet} on a per-row basis. Implementations of this
- * interface perform the actual work of mapping each row to a result object,
+ * interface perform the actual work of mapping each row to a result object
  * but don't need to worry about exception handling.
  * {@link java.sql.SQLException SQLExceptions} will be caught and handled
- * by the calling JdbcTemplate.
+ * by the calling {@code JdbcTemplate}.
  *
- * <p>Typically used either for {@link JdbcTemplate}'s query methods
- * or for out parameters of stored procedures. RowMapper objects are
+ * <p>Typically used either for {@code JdbcTemplate}'s query methods or for
+ * {@code out} parameters of stored procedures. {@code RowMapper} objects are
  * typically stateless and thus reusable; they are an ideal choice for
  * implementing row-mapping logic in a single place.
  *
  * <p>Alternatively, consider subclassing
  * {@link org.springframework.jdbc.object.MappingSqlQuery} from the
- * {@code jdbc.object} package: Instead of working with separate
- * JdbcTemplate and RowMapper objects, you can build executable query
- * objects (containing row-mapping logic) in that style.
+ * {@code jdbc.object} package: instead of working with separate
+ * {@code JdbcTemplate} and {@code RowMapper} objects, you can build executable
+ * query objects (containing row-mapping logic) in that style.
  *
  * @author Thomas Risberg
  * @author Juergen Hoeller
@@ -52,13 +52,13 @@ import org.springframework.lang.Nullable;
 public interface RowMapper<T> {
 
 	/**
-	 * Implementations must implement this method to map each row of data
-	 * in the ResultSet. This method should not call {@code next()} on
-	 * the ResultSet; it is only supposed to map values of the current row.
-	 * @param rs the ResultSet to map (pre-initialized for the current row)
+	 * Implementations must implement this method to map each row of data in the
+	 * {@code ResultSet}. This method should not call {@code next()} on the
+	 * {@code ResultSet}; it is only supposed to map values of the current row.
+	 * @param rs the {@code ResultSet} to map (pre-initialized for the current row)
 	 * @param rowNum the number of the current row
 	 * @return the result object for the current row (may be {@code null})
-	 * @throws SQLException if an SQLException is encountered getting
+	 * @throws SQLException if an SQLException is encountered while getting
 	 * column values (that is, there's no need to catch SQLException)
 	 */
 	@Nullable

spring-jdbc/src/test/java/org/springframework/jdbc/core/BeanPropertyRowMapperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,8 +16,6 @@
 
 package org.springframework.jdbc.core;
 
-import java.util.List;
-
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.CsvSource;
@@ -44,12 +42,15 @@ import static org.assertj.core.api.Assertions.assertThatNoException;
  */
 class BeanPropertyRowMapperTests extends AbstractRowMapperTests {
 
+	private static final String SELECT_NULL_AS_AGE = "select null as age from people";
+
+
 	@Test
 	@SuppressWarnings({"unchecked", "rawtypes"})
 	void overridingDifferentClassDefinedForMapping() {
 		BeanPropertyRowMapper mapper = new BeanPropertyRowMapper(Person.class);
-		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class).isThrownBy(() ->
-				mapper.setMappedClass(Long.class));
+		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class)
+			.isThrownBy(() -> mapper.setMappedClass(Long.class));
 	}
 
 	@Test
@@ -61,104 +62,106 @@ class BeanPropertyRowMapperTests extends AbstractRowMapperTests {
 	@Test
 	void staticQueryWithRowMapper() throws Exception {
 		Mock mock = new Mock();
-		List<Person> result = mock.getJdbcTemplate().query(
+		Person person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance from people",
 				new BeanPropertyRowMapper<>(Person.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void mappingWithInheritance() throws Exception {
 		Mock mock = new Mock();
-		List<ConcretePerson> result = mock.getJdbcTemplate().query(
+		ConcretePerson person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance from people",
 				new BeanPropertyRowMapper<>(ConcretePerson.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void mappingWithNoUnpopulatedFieldsFound() throws Exception {
 		Mock mock = new Mock();
-		List<ConcretePerson> result = mock.getJdbcTemplate().query(
+		ConcretePerson person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance from people",
 				new BeanPropertyRowMapper<>(ConcretePerson.class, true));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void mappingWithUnpopulatedFieldsNotChecked() throws Exception {
 		Mock mock = new Mock();
-		List<ExtendedPerson> result = mock.getJdbcTemplate().query(
+		ExtendedPerson person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance from people",
 				new BeanPropertyRowMapper<>(ExtendedPerson.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void mappingWithUnpopulatedFieldsNotAccepted() throws Exception {
+		BeanPropertyRowMapper<ExtendedPerson> mapper = new BeanPropertyRowMapper<>(ExtendedPerson.class, true);
 		Mock mock = new Mock();
-		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class).isThrownBy(() ->
-				mock.getJdbcTemplate().query("select name, age, birth_date, balance from people",
-						new BeanPropertyRowMapper<>(ExtendedPerson.class, true)));
+		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class)
+			.isThrownBy(() -> mock.getJdbcTemplate().query("select name, age, birth_date, balance from people", mapper));
 	}
 
 	@Test
 	void mappingNullValue() throws Exception {
 		BeanPropertyRowMapper<Person> mapper = new BeanPropertyRowMapper<>(Person.class);
 		Mock mock = new Mock(MockType.TWO);
-		assertThatExceptionOfType(TypeMismatchException.class).isThrownBy(() ->
-				mock.getJdbcTemplate().query("select name, null as age, birth_date, balance from people", mapper));
+		assertThatExceptionOfType(TypeMismatchException.class)
+			.isThrownBy(() -> mock.getJdbcTemplate().query(SELECT_NULL_AS_AGE, mapper));
+	}
+
+	@Test
+	void mappingNullValueWithPrimitivesDefaultedForNullValue() throws Exception {
+		BeanPropertyRowMapper<Person> mapper = new BeanPropertyRowMapper<>(Person.class);
+		mapper.setPrimitivesDefaultedForNullValue(true);
+		Mock mock = new Mock(MockType.TWO);
+		Person person = mock.getJdbcTemplate().queryForObject(SELECT_NULL_AS_AGE, mapper);
+		assertThat(person).extracting(Person::getAge).isEqualTo(42L);
+		mock.verifyClosed();
 	}
 
 	@Test
 	void queryWithSpaceInColumnNameAndLocalDateTime() throws Exception {
 		Mock mock = new Mock(MockType.THREE);
-		List<SpacePerson> result = mock.getJdbcTemplate().query(
+		SpacePerson person = mock.getJdbcTemplate().queryForObject(
 				"select last_name as \"Last Name\", age, birth_date, balance from people",
 				new BeanPropertyRowMapper<>(SpacePerson.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void queryWithSpaceInColumnNameAndLocalDate() throws Exception {
 		Mock mock = new Mock(MockType.THREE);
-		List<DatePerson> result = mock.getJdbcTemplate().query(
+		DatePerson person = mock.getJdbcTemplate().queryForObject(
 				"select last_name as \"Last Name\", age, birth_date, balance from people",
 				new BeanPropertyRowMapper<>(DatePerson.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void queryWithDirectNameMatchOnBirthDate() throws Exception {
 		Mock mock = new Mock(MockType.FOUR);
-		List<ConcretePerson> result = mock.getJdbcTemplate().query(
+		ConcretePerson person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birthdate, balance from people",
 				new BeanPropertyRowMapper<>(ConcretePerson.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 
 	@Test
 	void queryWithUnderscoreInColumnNameAndPersonWithMultipleAdjacentUppercaseLettersInPropertyName() throws Exception {
 		Mock mock = new Mock();
-		List<EmailPerson> result = mock.getJdbcTemplate().query(
+		EmailPerson person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance, e_mail from people",
 				new BeanPropertyRowMapper<>(EmailPerson.class));
-		assertThat(result).hasSize(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 		mock.verifyClosed();
 	}
 

spring-jdbc/src/test/java/org/springframework/jdbc/core/DataClassRowMapperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,7 @@
 package org.springframework.jdbc.core;
 
 import java.math.BigDecimal;
-import java.util.Collections;
 import java.util.Date;
-import java.util.List;
 
 import org.junit.jupiter.api.Test;
 
@@ -30,50 +28,48 @@ import org.springframework.jdbc.core.test.ConstructorPersonWithSetters;
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
+ * Tests for {@link DataClassRowMapper}.
+ *
  * @author Juergen Hoeller
+ * @author Sam Brannen
  * @since 5.3
  */
-public class DataClassRowMapperTests extends AbstractRowMapperTests {
+class DataClassRowMapperTests extends AbstractRowMapperTests {
 
 	@Test
-	public void testStaticQueryWithDataClass() throws Exception {
+	void staticQueryWithDataClass() throws Exception {
 		Mock mock = new Mock();
-		List<ConstructorPerson> result = mock.getJdbcTemplate().query(
+		ConstructorPerson person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance from people",
 				new DataClassRowMapper<>(ConstructorPerson.class));
-		assertThat(result.size()).isEqualTo(1);
-		verifyPerson(result.get(0));
+		verifyPerson(person);
 
 		mock.verifyClosed();
 	}
 
 	@Test
-	public void testStaticQueryWithDataClassAndGenerics() throws Exception {
+	void staticQueryWithDataClassAndGenerics() throws Exception {
 		Mock mock = new Mock();
-		List<ConstructorPersonWithGenerics> result = mock.getJdbcTemplate().query(
+		ConstructorPersonWithGenerics person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birth_date, balance from people",
 				new DataClassRowMapper<>(ConstructorPersonWithGenerics.class));
-		assertThat(result.size()).isEqualTo(1);
-		ConstructorPersonWithGenerics person = result.get(0);
 		assertThat(person.name()).isEqualTo("Bubba");
 		assertThat(person.age()).isEqualTo(22L);
-		assertThat(person.birthDate()).usingComparator(Date::compareTo).isEqualTo(new java.util.Date(1221222L));
-		assertThat(person.balance()).isEqualTo(Collections.singletonList(new BigDecimal("1234.56")));
+		assertThat(person.birthDate()).usingComparator(Date::compareTo).isEqualTo(new Date(1221222L));
+		assertThat(person.balance()).containsExactly(new BigDecimal("1234.56"));
 
 		mock.verifyClosed();
 	}
 
 	@Test
-	public void testStaticQueryWithDataClassAndSetters() throws Exception {
+	void staticQueryWithDataClassAndSetters() throws Exception {
 		Mock mock = new Mock(MockType.FOUR);
-		List<ConstructorPersonWithSetters> result = mock.getJdbcTemplate().query(
+		ConstructorPersonWithSetters person = mock.getJdbcTemplate().queryForObject(
 				"select name, age, birthdate, balance from people",
 				new DataClassRowMapper<>(ConstructorPersonWithSetters.class));
-		assertThat(result.size()).isEqualTo(1);
-		ConstructorPersonWithSetters person = result.get(0);
 		assertThat(person.name()).isEqualTo("BUBBA");
 		assertThat(person.age()).isEqualTo(22L);
-		assertThat(person.birthDate()).usingComparator(Date::compareTo).isEqualTo(new java.util.Date(1221222L));
+		assertThat(person.birthDate()).usingComparator(Date::compareTo).isEqualTo(new Date(1221222L));
 		assertThat(person.balance()).isEqualTo(new BigDecimal("1234.56"));
 
 		mock.verifyClosed();

spring-jdbc/src/test/java/org/springframework/jdbc/core/test/Person.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,6 +31,9 @@ public class Person {
 
 	private BigDecimal balance;
 
+	public Person() {
+		this.age = 42;  // custom "default" value for a primitive
+	}
 
 	public String getName() {
 		return name;

spring-jms/src/main/java/org/springframework/jms/annotation/JmsListener.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -76,6 +76,7 @@ import org.springframework.messaging.handler.annotation.MessageMapping;
  * <em>composed annotations</em> with attribute overrides.
  *
  * @author Stephane Nicoll
+ * @author Sam Brannen
  * @since 4.1
  * @see EnableJms
  * @see JmsListenerAnnotationBeanPostProcessor
@@ -110,6 +111,12 @@ public @interface JmsListener {
 
 	/**
 	 * The name for the durable subscription, if any.
+	 * <p>As of Spring Framework 5.3.26, if an explicit subscription name is not
+	 * specified, a default subscription name will be generated based on the fully
+	 * qualified name of the annotated listener method &mdash; for example,
+	 * {@code "org.example.jms.ProductListener.processRequest"} for a
+	 * {@code processRequest(...)} listener method in the
+	 * {@code org.example.jms.ProductListener} class.
 	 */
 	String subscription() default "";
 

spring-jms/src/main/java/org/springframework/jms/connection/SingleConnectionFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -347,8 +347,26 @@ public class SingleConnectionFactory implements ConnectionFactory, QueueConnecti
 			if (this.connection != null) {
 				closeConnection(this.connection);
 			}
-			this.connection = doCreateConnection();
-			prepareConnection(this.connection);
+			// Create new (method local) connection, which is later assigned to instance connection
+			//  - prevention to hold instance connection without exception listener, in case when
+			//    some subsequent methods (after creation of connection) throws JMSException
+			Connection con = doCreateConnection();
+			try {
+				prepareConnection(con);
+				this.connection = con;
+			}
+			catch (JMSException ex) {
+				// Attempt to close new (not used) connection to release possible resources
+				try {
+					con.close();
+				}
+				catch(Throwable th) {
+					if (logger.isDebugEnabled()) {
+						logger.debug("Could not close newly obtained JMS Connection that failed to prepare", th);
+					}
+				}
+				throw ex;
+			}
 			if (this.startedCount > 0) {
 				this.connection.start();
 			}

spring-jms/src/main/java/org/springframework/jms/listener/adapter/MessagingMessageListenerAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2021 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import javax.jms.JMSException;
 import javax.jms.Session;
 
 import org.springframework.core.MethodParameter;
+import org.springframework.jms.listener.SubscriptionNameProvider;
 import org.springframework.jms.support.JmsHeaderMapper;
 import org.springframework.jms.support.converter.MessageConversionException;
 import org.springframework.lang.Nullable;
@@ -34,7 +35,7 @@ import org.springframework.util.Assert;
  * A {@link javax.jms.MessageListener} adapter that invokes a configurable
  * {@link InvocableHandlerMethod}.
  *
- * <p>Wraps the incoming {@link javax.jms.Message} to Spring's {@link Message}
+ * <p>Wraps the incoming {@link javax.jms.Message} in Spring's {@link Message}
  * abstraction, copying the JMS standard headers using a configurable
  * {@link JmsHeaderMapper}.
  *
@@ -42,13 +43,19 @@ import org.springframework.util.Assert;
  * are provided as additional arguments so that these can be injected as
  * method arguments if necessary.
  *
+ * <p>As of Spring Framework 5.3.26, {@code MessagingMessageListenerAdapter} implements
+ * {@link SubscriptionNameProvider} in order to provide a meaningful default
+ * subscription name. See {@link #getSubscriptionName()} for details.
+ *
  * @author Stephane Nicoll
+ * @author Sam Brannen
  * @since 4.1
  * @see Message
  * @see JmsHeaderMapper
  * @see InvocableHandlerMethod
  */
-public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageListener {
+public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageListener
+		implements SubscriptionNameProvider {
 
 	@Nullable
 	private InvocableHandlerMethod handlerMethod;
@@ -83,17 +90,6 @@ public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageLis
 		}
 	}
 
-	@Override
-	protected Object preProcessResponse(Object result) {
-		MethodParameter returnType = getHandlerMethod().getReturnType();
-		if (result instanceof Message) {
-			return MessageBuilder.fromMessage((Message<?>) result)
-					.setHeader(AbstractMessageSendingTemplate.CONVERSION_HINT_HEADER, returnType).build();
-		}
-		return MessageBuilder.withPayload(result).setHeader(
-				AbstractMessageSendingTemplate.CONVERSION_HINT_HEADER, returnType).build();
-	}
-
 	protected Message<?> toMessagingMessage(javax.jms.Message jmsMessage) {
 		try {
 			return (Message<?>) getMessagingMessageConverter().fromMessage(jmsMessage);
@@ -104,7 +100,7 @@ public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageLis
 	}
 
 	/**
-	 * Invoke the handler, wrapping any exception to a {@link ListenerExecutionFailedException}
+	 * Invoke the handler, wrapping any exception in a {@link ListenerExecutionFailedException}
 	 * with a dedicated error message.
 	 */
 	@Nullable
@@ -132,4 +128,39 @@ public class MessagingMessageListenerAdapter extends AbstractAdaptableMessageLis
 		return sb.toString();
 	}
 
+	@Override
+	protected Object preProcessResponse(Object result) {
+		MethodParameter returnType = getHandlerMethod().getReturnType();
+		MessageBuilder<?> messageBuilder = (result instanceof Message ?
+				MessageBuilder.fromMessage((Message<?>) result) :
+				MessageBuilder.withPayload(result));
+		return messageBuilder
+				.setHeader(AbstractMessageSendingTemplate.CONVERSION_HINT_HEADER, returnType)
+				.build();
+	}
+
+	/**
+	 * Generate a subscription name for this {@code MessageListener} adapter based
+	 * on the following rules.
+	 * <ul>
+	 * <li>If the {@link #setHandlerMethod(InvocableHandlerMethod) handlerMethod}
+	 * has been set, the generated subscription name takes the form of
+	 * {@code handlerMethod.getBeanType().getName() + "." + handlerMethod.getMethod().getName()}.</li>
+	 * <li>Otherwise, the generated subscription name is the result of invoking
+	 * {@code getClass().getName()}, which aligns with the default behavior of
+	 * {@link org.springframework.jms.listener.AbstractMessageListenerContainer}.</li>
+	 * </ul>
+	 * @since 5.3.26
+	 * @see SubscriptionNameProvider#getSubscriptionName()
+	 */
+	@Override
+	public String getSubscriptionName() {
+		if (this.handlerMethod != null) {
+			return this.handlerMethod.getBeanType().getName() + "." + this.handlerMethod.getMethod().getName();
+		}
+		else {
+			return getClass().getName();
+		}
+	}
+
 }

spring-jms/src/main/java/org/springframework/jms/support/JmsAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

spring-jms/src/test/java/org/springframework/jms/connection/SingleConnectionFactoryTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,9 @@
 
 package org.springframework.jms.connection;
 
+import java.lang.reflect.Field;
+import java.util.concurrent.atomic.AtomicInteger;
+
 import javax.jms.Connection;
 import javax.jms.ConnectionFactory;
 import javax.jms.ExceptionListener;
@@ -30,7 +33,10 @@ import javax.jms.TopicSession;
 
 import org.junit.jupiter.api.Test;
 
+import org.springframework.util.ReflectionUtils;
+
 import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.mockito.BDDMockito.given;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
@@ -342,6 +348,76 @@ public class SingleConnectionFactoryTests {
 		assertThat(listener.getCount()).isEqualTo(1);
 	}
 
+	@Test
+	public void testWithConnectionFactoryAndExceptionListenerAndReconnectOnExceptionWithJMSException() throws Exception {
+		// Throws JMSException on setExceptionListener() method, but only at the first time
+		class FailingTestConnection extends TestConnection {
+			private int setExceptionListenerInvocationCounter;
+
+			@Override
+			public void setExceptionListener(ExceptionListener exceptionListener) throws JMSException {
+				setExceptionListenerInvocationCounter++;
+				// Throw JMSException on first invocation
+				if (setExceptionListenerInvocationCounter == 1) {
+					throw new JMSException("Test JMSException (setExceptionListener())");
+				}
+				super.setExceptionListener(exceptionListener);
+			}
+		}
+
+		// Prepare base JMS ConnectionFactory
+		// - createConnection(1st) -> TestConnection,
+		// - createConnection(2nd and next) -> FailingTestConnection
+		TestConnection testCon = new TestConnection();
+		FailingTestConnection failingCon = new FailingTestConnection();
+		AtomicInteger createConnectionMethodCounter = new AtomicInteger();
+		ConnectionFactory cf = mock(ConnectionFactory.class);
+		given(cf.createConnection()).willAnswer(invocation -> {
+			int methodInvocationCounter = createConnectionMethodCounter.incrementAndGet();
+			return methodInvocationCounter == 1 ? testCon : failingCon;
+		});
+
+		// Prepare SingleConnectionFactory (setReconnectOnException())
+		// - internal connection exception listener should be registered
+		SingleConnectionFactory scf = new SingleConnectionFactory(cf);
+		scf.setReconnectOnException(true);
+		Field conField = ReflectionUtils.findField(SingleConnectionFactory.class, "connection");
+		conField.setAccessible(true);
+
+		// Get connection (1st)
+		Connection con1 = scf.getConnection();
+		assertThat(createConnectionMethodCounter.get()).isEqualTo(1);
+		assertThat(con1).isNotNull();
+		assertThat(con1.getExceptionListener()).isNotNull();
+		assertThat(con1).isSameAs(testCon);
+		// Get connection again, the same should be returned (shared connection till some problem)
+		Connection con2 = scf.getConnection();
+		assertThat(createConnectionMethodCounter.get()).isEqualTo(1);
+		assertThat(con2.getExceptionListener()).isNotNull();
+		assertThat(con2).isSameAs(con1);
+
+		// Invoke reset connection to simulate problem with connection
+		// - SCF exception listener should be invoked -> connection should be set to null
+		// - next attempt to invoke getConnection() must create new connection
+		scf.resetConnection();
+		assertThat(conField.get(scf)).isNull();
+
+		// Attempt to get connection again
+		// - JMSException should be returned from FailingTestConnection
+		// - connection should be still null (no new connection without exception listener like before fix)
+		assertThatExceptionOfType(JMSException.class).isThrownBy(() -> scf.getConnection());
+		assertThat(createConnectionMethodCounter.get()).isEqualTo(2);
+		assertThat(conField.get(scf)).isNull();
+
+		// Attempt to get connection again -> FailingTestConnection should be returned
+		//  - no JMSException is thrown, exception listener should be present
+		Connection con3 = scf.getConnection();
+		assertThat(createConnectionMethodCounter.get()).isEqualTo(3);
+		assertThat(con3).isNotNull();
+		assertThat(con3).isSameAs(failingCon);
+		assertThat(con3.getExceptionListener()).isNotNull();
+	}
+
 	@Test
 	public void testWithConnectionFactoryAndLocalExceptionListenerWithCleanup() throws JMSException {
 		ConnectionFactory cf = mock(ConnectionFactory.class);

spring-jms/src/test/java/org/springframework/jms/listener/adapter/MessagingMessageListenerAdapterIntegrationTests.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.jms.listener.adapter;
+
+import java.lang.reflect.Method;
+import java.util.stream.Stream;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+import org.springframework.jms.listener.SimpleMessageListenerContainer;
+import org.springframework.messaging.handler.invocation.InvocableHandlerMethod;
+import org.springframework.util.ReflectionUtils;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Named.named;
+import static org.junit.jupiter.params.provider.Arguments.arguments;
+
+/**
+ * Integration tests for {@link MessagingMessageListenerAdapter}.
+ *
+ * <p>These tests are similar to those in {@link MessagingMessageListenerAdapterTests},
+ * except that these tests have a different scope and do not use mocks.
+ *
+ * @author Sam Brannen
+ * @since 5.3.26
+ * @see MessagingMessageListenerAdapterTests
+ */
+class MessagingMessageListenerAdapterIntegrationTests {
+
+	@ParameterizedTest
+	@MethodSource("subscriptionNames")
+	void defaultSubscriptionName(Method method, String subscriptionName) {
+		MessagingMessageListenerAdapter messageListenerAdaptor = new MessagingMessageListenerAdapter();
+		InvocableHandlerMethod handlerMethod = new InvocableHandlerMethod(new CustomListener(), method);
+		messageListenerAdaptor.setHandlerMethod(handlerMethod);
+
+		SimpleMessageListenerContainer listenerContainer = new SimpleMessageListenerContainer();
+		assertThat(listenerContainer.getSubscriptionName()).isNull();
+
+		listenerContainer.setMessageListener(messageListenerAdaptor);
+		assertThat(listenerContainer.getSubscriptionName()).isEqualTo(subscriptionName);
+	}
+
+
+	private static Stream<Arguments> subscriptionNames() {
+		String method1 = "toUpperCase";
+		String method2 = "toUpperCase(java.lang.String)";
+		String method3 = "toUpperCase(java.lang.String,int)";
+		String method4 = "toUpperCase(java.lang.String[])";
+		String expectedName = CustomListener.class.getName() + ".toUpperCase";
+		return Stream.of(
+				arguments(named(method1, findMethod()), expectedName),
+				arguments(named(method2, findMethod(String.class)), expectedName),
+				arguments(named(method3, findMethod(String.class, String.class)), expectedName),
+				arguments(named(method4, findMethod(byte[].class)), expectedName));
+	}
+
+	private static Method findMethod(Class<?>... paramTypes) {
+		return ReflectionUtils.findMethod(CustomListener.class, "toUpperCase", paramTypes);
+	}
+
+
+	@SuppressWarnings("unused")
+	private static class CustomListener {
+
+		// @JmsListener(...)
+		String toUpperCase() {
+			return "ENIGMA";
+		}
+
+		// @JmsListener(...)
+		String toUpperCase(String input) {
+			return "ENIGMA";
+		}
+
+		// @JmsListener(...)
+		String toUpperCase(String input, String customHeader) {
+			return "ENIGMA";
+		}
+
+		// @JmsListener(...)
+		String toUpperCase(byte[] input) {
+			return "ENIGMA";
+		}
+
+	}
+
+}

spring-messaging/src/test/java/org/springframework/messaging/handler/invocation/ResolvableMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,8 +17,10 @@
 package org.springframework.messaging.handler.invocation;
 
 import java.lang.annotation.Annotation;
+import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Method;
 import java.lang.reflect.Parameter;
+import java.lang.reflect.Proxy;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -28,16 +30,14 @@ import java.util.function.Consumer;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 
-import org.aopalliance.intercept.MethodInterceptor;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 
-import org.springframework.aop.framework.ProxyFactory;
-import org.springframework.aop.target.EmptyTargetSource;
 import org.springframework.cglib.core.SpringNamingPolicy;
 import org.springframework.cglib.proxy.Callback;
 import org.springframework.cglib.proxy.Enhancer;
 import org.springframework.cglib.proxy.Factory;
+import org.springframework.cglib.proxy.MethodInterceptor;
 import org.springframework.cglib.proxy.MethodProxy;
 import org.springframework.core.DefaultParameterNameDiscoverer;
 import org.springframework.core.MethodIntrospector;
@@ -123,6 +123,7 @@ import static java.util.stream.Collectors.joining;
  * </pre>
  *
  * @author Rossen Stoyanchev
+ * @author Juergen Hoeller
  * @since 5.2
  */
 public class ResolvableMethod {
@@ -189,7 +190,6 @@ public class ResolvableMethod {
 
 	/**
 	 * Filter on method arguments with annotation.
-	 * See {@link org.springframework.web.method.MvcAnnotationPredicates}.
 	 */
 	@SafeVarargs
 	public final ArgResolver annot(Predicate<MethodParameter>... filter) {
@@ -302,7 +302,6 @@ public class ResolvableMethod {
 
 		/**
 		 * Filter on annotated methods.
-		 * See {@link org.springframework.web.method.MvcAnnotationPredicates}.
 		 */
 		@SafeVarargs
 		public final Builder<T> annot(Predicate<Method>... filters) {
@@ -313,7 +312,6 @@ public class ResolvableMethod {
 		/**
 		 * Filter on methods annotated with the given annotation type.
 		 * @see #annot(Predicate[])
-		 * See {@link org.springframework.web.method.MvcAnnotationPredicates}.
 		 */
 		@SafeVarargs
 		public final Builder<T> annotPresent(Class<? extends Annotation>... annotationTypes) {
@@ -530,7 +528,6 @@ public class ResolvableMethod {
 
 		/**
 		 * Filter on method arguments with annotations.
-		 * See {@link org.springframework.web.method.MvcAnnotationPredicates}.
 		 */
 		@SafeVarargs
 		public final ArgResolver annot(Predicate<MethodParameter>... filters) {
@@ -542,7 +539,6 @@ public class ResolvableMethod {
 		 * Filter on method arguments that have the given annotations.
 		 * @param annotationTypes the annotation types
 		 * @see #annot(Predicate[])
-		 * See {@link org.springframework.web.method.MvcAnnotationPredicates}.
 		 */
 		@SafeVarargs
 		public final ArgResolver annotPresent(Class<? extends Annotation>... annotationTypes) {
@@ -615,16 +611,10 @@ public class ResolvableMethod {
 	}
 
 
-	private static class MethodInvocationInterceptor
-			implements org.springframework.cglib.proxy.MethodInterceptor, MethodInterceptor {
+	private static class MethodInvocationInterceptor implements MethodInterceptor, InvocationHandler {
 
 		private Method invokedMethod;
 
-
-		Method getInvokedMethod() {
-			return this.invokedMethod;
-		}
-
 		@Override
 		@Nullable
 		public Object intercept(Object object, Method method, Object[] args, MethodProxy proxy) {
@@ -639,20 +629,23 @@ public class ResolvableMethod {
 
 		@Override
 		@Nullable
-		public Object invoke(org.aopalliance.intercept.MethodInvocation inv) throws Throwable {
-			return intercept(inv.getThis(), inv.getMethod(), inv.getArguments(), null);
+		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+			return intercept(proxy, method, args, null);
+		}
+
+		Method getInvokedMethod() {
+			return this.invokedMethod;
 		}
 	}
 
+
 	@SuppressWarnings("unchecked")
 	private static <T> T initProxy(Class<?> type, MethodInvocationInterceptor interceptor) {
 		Assert.notNull(type, "'type' must not be null");
 		if (type.isInterface()) {
-			ProxyFactory factory = new ProxyFactory(EmptyTargetSource.INSTANCE);
-			factory.addInterface(type);
-			factory.addInterface(Supplier.class);
-			factory.addAdvice(interceptor);
-			return (T) factory.getProxy();
+			return (T) Proxy.newProxyInstance(type.getClassLoader(),
+					new Class<?>[] {type, Supplier.class},
+					interceptor);
 		}
 
 		else {

spring-orm/src/main/java/org/springframework/orm/jpa/SharedEntityManagerCreator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,6 +62,7 @@ import org.springframework.util.ConcurrentReferenceHashMap;
  * @author Rod Johnson
  * @author Oliver Gierke
  * @author Mark Paluch
+ * @author Sam Brannen
  * @since 2.0
  * @see javax.persistence.PersistenceContext
  * @see javax.persistence.PersistenceContextType#TRANSACTION
@@ -74,9 +75,9 @@ public abstract class SharedEntityManagerCreator {
 
 	private static final Map<Class<?>, Class<?>[]> cachedQueryInterfaces = new ConcurrentReferenceHashMap<>(4);
 
-	private static final Set<String> transactionRequiringMethods = new HashSet<>(8);
+	private static final Set<String> transactionRequiringMethods = new HashSet<>(6);
 
-	private static final Set<String> queryTerminatingMethods = new HashSet<>(8);
+	private static final Set<String> queryTerminatingMethods = new HashSet<>(9);
 
 	static {
 		transactionRequiringMethods.add("joinTransaction");
@@ -86,12 +87,15 @@ public abstract class SharedEntityManagerCreator {
 		transactionRequiringMethods.add("remove");
 		transactionRequiringMethods.add("refresh");
 
-		queryTerminatingMethods.add("execute");  // JPA 2.1 StoredProcedureQuery
-		queryTerminatingMethods.add("executeUpdate");
-		queryTerminatingMethods.add("getSingleResult");
-		queryTerminatingMethods.add("getResultStream");
-		queryTerminatingMethods.add("getResultList");
-		queryTerminatingMethods.add("list");  // Hibernate Query.list() method
+		queryTerminatingMethods.add("execute");  // javax.persistence.StoredProcedureQuery.execute()
+		queryTerminatingMethods.add("executeUpdate");  // javax.persistence.Query.executeUpdate()
+		queryTerminatingMethods.add("getSingleResult");  // javax.persistence.Query.getSingleResult()
+		queryTerminatingMethods.add("getResultStream");  // javax.persistence.Query.getResultStream()
+		queryTerminatingMethods.add("getResultList");  // javax.persistence.Query.getResultList()
+		queryTerminatingMethods.add("list");  // org.hibernate.query.Query.list()
+		queryTerminatingMethods.add("stream");  // org.hibernate.query.Query.stream()
+		queryTerminatingMethods.add("uniqueResult");  // org.hibernate.query.Query.uniqueResult()
+		queryTerminatingMethods.add("uniqueResultOptional");  // org.hibernate.query.Query.uniqueResultOptional()
 	}
 
 
@@ -432,7 +436,7 @@ public abstract class SharedEntityManagerCreator {
 									entry.setValue(storedProc.getOutputParameterValue(key.toString()));
 								}
 							}
-							catch (IllegalArgumentException ex) {
+							catch (RuntimeException ex) {
 								entry.setValue(ex);
 							}
 						}

spring-r2dbc/src/main/java/org/springframework/r2dbc/connection/R2dbcTransactionManager.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -193,7 +193,7 @@ public class R2dbcTransactionManager extends AbstractReactiveTransactionManager
 				Mono<Connection> newCon = Mono.from(obtainConnectionFactory().create());
 				connectionMono = newCon.doOnNext(connection -> {
 					if (logger.isDebugEnabled()) {
-						logger.debug("Acquired Connection [" + newCon + "] for R2DBC transaction");
+						logger.debug("Acquired Connection [" + connection + "] for R2DBC transaction");
 					}
 					txObject.setConnectionHolder(new ConnectionHolder(connection), true);
 				});
@@ -325,31 +325,48 @@ public class R2dbcTransactionManager extends AbstractReactiveTransactionManager
 			Mono<Void> afterCleanup = Mono.empty();
 
 			if (txObject.isMustRestoreAutoCommit()) {
-				afterCleanup = afterCleanup.then(Mono.from(con.setAutoCommit(true)));
+				Mono<Void> restoreAutoCommitStep = safeCleanupStep(
+						"doCleanupAfterCompletion when restoring autocommit", Mono.from(con.setAutoCommit(true)));
+				afterCleanup = afterCleanup.then(restoreAutoCommitStep);
 			}
 
 			if (txObject.getPreviousIsolationLevel() != null) {
-				afterCleanup = afterCleanup
-						.then(Mono.from(con.setTransactionIsolationLevel(txObject.getPreviousIsolationLevel())));
+				Mono<Void> restoreIsolationStep = safeCleanupStep(
+						"doCleanupAfterCompletion when restoring isolation level",
+						Mono.from(con.setTransactionIsolationLevel(txObject.getPreviousIsolationLevel())));
+				afterCleanup = afterCleanup.then(restoreIsolationStep);
 			}
 
-			return afterCleanup.then(Mono.defer(() -> {
+			Mono<Void> releaseConnectionStep = Mono.defer(() -> {
 				try {
 					if (txObject.isNewConnectionHolder()) {
 						if (logger.isDebugEnabled()) {
 							logger.debug("Releasing R2DBC Connection [" + con + "] after transaction");
 						}
-						return ConnectionFactoryUtils.releaseConnection(con, obtainConnectionFactory());
+						return safeCleanupStep("doCleanupAfterCompletion when releasing R2DBC Connection",
+								ConnectionFactoryUtils.releaseConnection(con, obtainConnectionFactory()));
 					}
 				}
 				finally {
 					txObject.getConnectionHolder().clear();
 				}
 				return Mono.empty();
-			}));
+			});
+			return afterCleanup.then(releaseConnectionStep);
 		});
 	}
 
+	private Mono<Void> safeCleanupStep(String stepDescription, Mono<Void> stepMono) {
+		if (!logger.isDebugEnabled()) {
+			return stepMono.onErrorComplete();
+		}
+		else {
+			return stepMono.doOnError(e ->
+							logger.debug(String.format("Error ignored during %s: %s", stepDescription, e)))
+					.onErrorComplete();
+		}
+	}
+
 	/**
 	 * Prepare the transactional {@link Connection} right before transaction begin.
 	 * @deprecated in favor of {@link #prepareTransactionalConnection(Connection, TransactionDefinition)}

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/ConnectionFunction.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,34 +20,18 @@ import java.util.function.Function;
 
 import io.r2dbc.spi.Connection;
 
+
 /**
  * Union type combining {@link Function} and {@link SqlProvider} to expose the SQL that is
- * related to the underlying action.
+ * related to the underlying action. The SqlProvider can support lazy / generate once semantics,
+ * in which case {@link #getSql()} can be {@code null} until the {@code #apply(Connection)}
+ * method is invoked.
  *
  * @author Mark Paluch
+ * @author Simon Baslé
  * @since 5.3
  * @param <R> the type of the result of the function.
  */
-class ConnectionFunction<R> implements Function<Connection, R>, SqlProvider {
-
-	private final String sql;
-
-	private final Function<Connection, R> function;
-
-
-	ConnectionFunction(String sql, Function<Connection, R> function) {
-		this.sql = sql;
-		this.function = function;
-	}
-
-
-	@Override
-	public R apply(Connection t) {
-		return this.function.apply(t);
-	}
-
-	@Override
-	public String getSql() {
-		return this.sql;
-	}
+interface ConnectionFunction<R> extends Function<Connection, R>, SqlProvider {
 }
+

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DatabaseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -79,7 +79,10 @@ public interface DatabaseClient extends ConnectionAccessor {
 	 * the execution. The SQL string can contain either native parameter
 	 * bind markers or named parameters (e.g. {@literal :foo, :bar}) when
 	 * {@link NamedParameterExpander} is enabled.
-	 * <p>Accepts {@link PreparedOperation} as SQL and binding {@link Supplier}
+	 * <p>Accepts {@link PreparedOperation} as SQL and binding {@link Supplier}.
+	 * <p>{@code DatabaseClient} implementations should defer the resolution of
+	 * the SQL string as much as possible, ideally up to the point where a
+	 * {@code Subscription} happens. This is the case for the default implementation.
 	 * @param sqlSupplier a supplier for the SQL statement
 	 * @return a new {@link GenericExecuteSpec}
 	 * @see NamedParameterExpander

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DefaultDatabaseClient.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,6 +60,7 @@ import org.springframework.util.StringUtils;
  * @author Mark Paluch
  * @author Mingyuan Wu
  * @author Bogdan Ilchyshyn
+ * @author Simon Baslé
  * @since 5.3
  */
 class DefaultDatabaseClient implements DatabaseClient {
@@ -158,11 +159,9 @@ class DefaultDatabaseClient implements DatabaseClient {
 	/**
 	 * Release the {@link Connection}.
 	 * @param connection to close.
-	 * @return a {@link Publisher} that completes successfully when the connection is
-	 * closed
+	 * @return a {@link Publisher} that completes successfully when the connection is closed
 	 */
 	private Publisher<Void> closeConnection(Connection connection) {
-
 		return ConnectionFactoryUtils.currentConnectionFactory(
 				obtainConnectionFactory()).then().onErrorResume(Exception.class,
 						e -> Mono.from(connection.close()));
@@ -188,24 +187,22 @@ class DefaultDatabaseClient implements DatabaseClient {
 				new CloseSuppressingInvocationHandler(con));
 	}
 
-	private static Mono<Integer> sumRowsUpdated(
-			Function<Connection, Flux<Result>> resultFunction, Connection it) {
+	private static Mono<Integer> sumRowsUpdated(Function<Connection, Flux<Result>> resultFunction, Connection it) {
 		return resultFunction.apply(it)
 				.flatMap(Result::getRowsUpdated)
 				.collect(Collectors.summingInt(Integer::intValue));
 	}
 
 	/**
-	 * Determine SQL from potential provider object.
-	 * @param sqlProvider object that's potentially a SqlProvider
+	 * Get SQL from a potential provider object.
+	 * @param object an object that is potentially an SqlProvider
 	 * @return the SQL string, or {@code null}
 	 * @see SqlProvider
 	 */
 	@Nullable
-	private static String getSql(Object sqlProvider) {
-
-		if (sqlProvider instanceof SqlProvider) {
-			return ((SqlProvider) sqlProvider).getSql();
+	private static String getSql(Object object) {
+		if (object instanceof SqlProvider) {
+			return ((SqlProvider) object).getSql();
 		}
 		else {
 			return null;
@@ -214,7 +211,7 @@ class DefaultDatabaseClient implements DatabaseClient {
 
 
 	/**
-	 * Base class for {@link DatabaseClient.GenericExecuteSpec} implementations.
+	 * Default {@link DatabaseClient.GenericExecuteSpec} implementation.
 	 */
 	class DefaultGenericExecuteSpec implements GenericExecuteSpec {
 
@@ -322,9 +319,8 @@ class DefaultDatabaseClient implements DatabaseClient {
 			return fetch().rowsUpdated().then();
 		}
 
-		private <T> FetchSpec<T> execute(Supplier<String> sqlSupplier, BiFunction<Row, RowMetadata, T> mappingFunction) {
-			String sql = getRequiredSql(sqlSupplier);
-			Function<Connection, Statement> statementFunction = connection -> {
+		private ResultFunction getResultFunction(Supplier<String> sqlSupplier) {
+			BiFunction<Connection, String, Statement> statementFunction = (connection, sql) -> {
 				if (logger.isDebugEnabled()) {
 					logger.debug("Executing SQL statement [" + sql + "]");
 				}
@@ -370,16 +366,16 @@ class DefaultDatabaseClient implements DatabaseClient {
 				return statement;
 			};
 
-			Function<Connection, Flux<Result>> resultFunction = connection -> {
-				Statement statement = statementFunction.apply(connection);
-				return Flux.from(this.filterFunction.filter(statement, DefaultDatabaseClient.this.executeFunction))
-				.cast(Result.class).checkpoint("SQL \"" + sql + "\" [DatabaseClient]");
-			};
+			return new ResultFunction(sqlSupplier, statementFunction, this.filterFunction, DefaultDatabaseClient.this.executeFunction);
+		}
+
+		private <T> FetchSpec<T> execute(Supplier<String> sqlSupplier, BiFunction<Row, RowMetadata, T> mappingFunction) {
+			ResultFunction resultHandler = getResultFunction(sqlSupplier);
 
 			return new DefaultFetchSpec<>(
-					DefaultDatabaseClient.this, sql,
-					new ConnectionFunction<>(sql, resultFunction),
-					new ConnectionFunction<>(sql, connection -> sumRowsUpdated(resultFunction, connection)),
+					DefaultDatabaseClient.this,
+					resultHandler,
+					connection -> sumRowsUpdated(resultHandler, connection),
 					mappingFunction);
 		}
 
@@ -505,12 +501,11 @@ class DefaultDatabaseClient implements DatabaseClient {
 
 		private static final long serialVersionUID = -8994138383301201380L;
 
-		final Connection connection;
+		final transient Connection connection;
 
-		final Function<Connection, Publisher<Void>> closeFunction;
+		final transient Function<Connection, Publisher<Void>> closeFunction;
 
-		ConnectionCloseHolder(Connection connection,
-				Function<Connection, Publisher<Void>> closeFunction) {
+		ConnectionCloseHolder(Connection connection, Function<Connection, Publisher<Void>> closeFunction) {
 			this.connection = connection;
 			this.closeFunction = closeFunction;
 		}

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DefaultFetchSpec.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,7 +20,6 @@ import java.util.function.BiFunction;
 import java.util.function.Function;
 
 import io.r2dbc.spi.Connection;
-import io.r2dbc.spi.Result;
 import io.r2dbc.spi.Row;
 import io.r2dbc.spi.RowMetadata;
 import reactor.core.publisher.Flux;
@@ -32,6 +31,7 @@ import org.springframework.dao.IncorrectResultSizeDataAccessException;
  * Default {@link FetchSpec} implementation.
  *
  * @author Mark Paluch
+ * @author Simon Baslé
  * @since 5.3
  * @param <T> the row result type
  */
@@ -39,24 +39,21 @@ class DefaultFetchSpec<T> implements FetchSpec<T> {
 
 	private final ConnectionAccessor connectionAccessor;
 
-	private final String sql;
-
-	private final Function<Connection, Flux<Result>> resultFunction;
+	private final ResultFunction resultFunction;
 
 	private final Function<Connection, Mono<Integer>> updatedRowsFunction;
 
 	private final BiFunction<Row, RowMetadata, T> mappingFunction;
 
 
-	DefaultFetchSpec(ConnectionAccessor connectionAccessor, String sql,
-			Function<Connection, Flux<Result>> resultFunction,
+	DefaultFetchSpec(ConnectionAccessor connectionAccessor,
+			ResultFunction resultFunction,
 			Function<Connection, Mono<Integer>> updatedRowsFunction,
 			BiFunction<Row, RowMetadata, T> mappingFunction) {
 
-		this.sql = sql;
 		this.connectionAccessor = connectionAccessor;
 		this.resultFunction = resultFunction;
-		this.updatedRowsFunction = updatedRowsFunction;
+		this.updatedRowsFunction = new DelegateConnectionFunction<>(resultFunction, updatedRowsFunction);
 		this.mappingFunction = mappingFunction;
 	}
 
@@ -70,7 +67,7 @@ class DefaultFetchSpec<T> implements FetchSpec<T> {
 					}
 					if (list.size() > 1) {
 						return Mono.error(new IncorrectResultSizeDataAccessException(
-								String.format("Query [%s] returned non unique result.", this.sql),
+								String.format("Query [%s] returned non unique result.", this.resultFunction.getSql()),
 								1));
 					}
 					return Mono.just(list.get(0));
@@ -84,7 +81,7 @@ class DefaultFetchSpec<T> implements FetchSpec<T> {
 
 	@Override
 	public Flux<T> all() {
-		return this.connectionAccessor.inConnectionMany(new ConnectionFunction<>(this.sql,
+		return this.connectionAccessor.inConnectionMany(new DelegateConnectionFunction<>(this.resultFunction,
 				connection -> this.resultFunction.apply(connection)
 						.flatMap(result -> result.map(this.mappingFunction))));
 	}

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/DelegateConnectionFunction.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.r2dbc.core;
+
+import java.util.function.Function;
+
+import io.r2dbc.spi.Connection;
+
+import org.springframework.lang.Nullable;
+
+/**
+ * A {@link ConnectionFunction} that delegates to a {@code SqlProvider} and a plain
+ * {@code Function}.
+ *
+ * @author Simon Baslé
+ * @since 5.3.26
+ * @param <R> the type of the result of the function.
+ */
+final class DelegateConnectionFunction<R> implements ConnectionFunction<R> {
+
+	private final SqlProvider sql;
+
+	private final Function<Connection, R> function;
+
+
+	DelegateConnectionFunction(SqlProvider sql, Function<Connection, R> function) {
+		this.sql = sql;
+		this.function = function;
+	}
+
+
+	@Override
+	public R apply(Connection t) {
+		return this.function.apply(t);
+	}
+
+	@Nullable
+	@Override
+	public String getSql() {
+		return this.sql.getSql();
+	}
+}

spring-r2dbc/src/main/java/org/springframework/r2dbc/core/ResultFunction.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.r2dbc.core;
+
+import java.util.function.BiFunction;
+import java.util.function.Supplier;
+
+import io.r2dbc.spi.Connection;
+import io.r2dbc.spi.Result;
+import io.r2dbc.spi.Statement;
+import reactor.core.publisher.Flux;
+
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+/**
+ * A {@link ConnectionFunction} that produces a {@code Flux} of {@link Result} and that
+ * defers generation of the SQL until the function has been applied.
+ * Beforehand, the {@code getSql()} method simply returns {@code null}. The sql String is
+ * also memoized during application, so that subsequent calls to {@link #getSql()} return
+ * the same {@code String} without further calls to the {@code Supplier}.
+ *
+ * @author Mark Paluch
+ * @author Simon Baslé
+ * @since 5.3.26
+ */
+final class ResultFunction implements ConnectionFunction<Flux<Result>> {
+
+	final Supplier<String> sqlSupplier;
+	final BiFunction<Connection, String, Statement> statementFunction;
+	final StatementFilterFunction filterFunction;
+	final ExecuteFunction executeFunction;
+
+	@Nullable
+	String resolvedSql = null;
+
+	ResultFunction(Supplier<String> sqlSupplier, BiFunction<Connection, String, Statement> statementFunction, StatementFilterFunction filterFunction, ExecuteFunction executeFunction) {
+		this.sqlSupplier = sqlSupplier;
+		this.statementFunction = statementFunction;
+		this.filterFunction = filterFunction;
+		this.executeFunction = executeFunction;
+	}
+
+	@Override
+	public Flux<Result> apply(Connection connection) {
+		String sql = this.sqlSupplier.get();
+		Assert.state(StringUtils.hasText(sql), "SQL returned by supplier must not be empty");
+		this.resolvedSql = sql;
+		Statement statement = this.statementFunction.apply(connection, sql);
+		return Flux.from(this.filterFunction.filter(statement, this.executeFunction))
+				.cast(Result.class).checkpoint("SQL \"" + sql + "\" [DatabaseClient]");
+	}
+
+	@Nullable
+	@Override
+	public String getSql() {
+		return this.resolvedSql;
+	}
+}

spring-r2dbc/src/test/java/org/springframework/r2dbc/connection/R2dbcTransactionManagerUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,12 +22,15 @@ import io.r2dbc.spi.Connection;
 import io.r2dbc.spi.ConnectionFactory;
 import io.r2dbc.spi.IsolationLevel;
 import io.r2dbc.spi.R2dbcBadGrammarException;
+import io.r2dbc.spi.R2dbcTimeoutException;
 import io.r2dbc.spi.Statement;
+import org.assertj.core.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
 
+import org.springframework.r2dbc.BadSqlGrammarException;
 import org.springframework.transaction.CannotCreateTransactionException;
 import org.springframework.transaction.IllegalTransactionStateException;
 import org.springframework.transaction.TransactionDefinition;
@@ -319,6 +322,34 @@ class R2dbcTransactionManagerUnitTests {
 		verifyNoMoreInteractions(connectionMock);
 	}
 
+	@Test
+	@SuppressWarnings("unchecked")
+	void testConnectionReleasedWhenRollbackFails() {
+		when(connectionMock.rollbackTransaction()).thenReturn(Mono.defer(() -> Mono.error(new R2dbcBadGrammarException("Rollback should fail"))), Mono.empty());
+
+		TransactionalOperator operator = TransactionalOperator.create(tm);
+
+		when(connectionMock.isAutoCommit()).thenReturn(true);
+		when(connectionMock.setAutoCommit(true)).thenReturn(Mono.defer(() -> Mono.error(new R2dbcTimeoutException("SET AUTOCOMMIT = 1 timed out"))));
+		when(connectionMock.setTransactionIsolationLevel(any())).thenReturn(Mono.empty());
+		when(connectionMock.setAutoCommit(false)).thenReturn(Mono.empty());
+
+		operator.execute(reactiveTransaction -> ConnectionFactoryUtils.getConnection(connectionFactoryMock)
+						.doOnNext(connection -> {
+							throw new IllegalStateException("Intentional error to trigger rollback");
+						}).then()).as(StepVerifier::create)
+				.verifyErrorSatisfies(e -> Assertions.assertThat(e)
+						.isInstanceOf(BadSqlGrammarException.class)
+						.hasCause(new R2dbcBadGrammarException("Rollback should fail"))
+				);
+
+		verify(connectionMock).isAutoCommit();
+		verify(connectionMock).beginTransaction();
+		verify(connectionMock, never()).commitTransaction();
+		verify(connectionMock).rollbackTransaction();
+		verify(connectionMock).close();
+	}
+
 	@Test
 	void testTransactionSetRollbackOnly() {
 		when(connectionMock.rollbackTransaction()).thenReturn(Mono.empty());

spring-r2dbc/src/test/java/org/springframework/r2dbc/core/DefaultDatabaseClientUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,8 @@
 package org.springframework.r2dbc.core;
 
 import java.util.Arrays;
+import java.util.List;
+import java.util.concurrent.atomic.AtomicInteger;
 
 import io.r2dbc.spi.Connection;
 import io.r2dbc.spi.ConnectionFactory;
@@ -64,6 +66,7 @@ import static org.mockito.BDDMockito.when;
  * @author Mark Paluch
  * @author Ferdinand Jacobs
  * @author Jens Schauder
+ * @author Simon Baslé
  */
 @ExtendWith(MockitoExtension.class)
 @MockitoSettings(strictness = Strictness.LENIENT)
@@ -397,6 +400,47 @@ class DefaultDatabaseClientUnitTests {
 		inOrder.verifyNoMoreInteractions();
 	}
 
+	@Test
+	void sqlSupplierInvocationIsDeferredUntilSubscription() {
+		// We'll have either 2 or 3 rows, depending on the subscription and the generated SQL
+		MockRowMetadata metadata = MockRowMetadata.builder().columnMetadata(
+				MockColumnMetadata.builder().name("id").javaType(Integer.class).build()).build();
+		final MockRow row1 = MockRow.builder().identified("id", Integer.class, 1).build();
+		final MockRow row2 = MockRow.builder().identified("id", Integer.class, 2).build();
+		final MockRow row3 = MockRow.builder().identified("id", Integer.class, 3).build();
+		// Set up 2 mock statements
+		mockStatementFor("SELECT id FROM test WHERE id < '3'", MockResult.builder()
+				.rowMetadata(metadata)
+				.row(row1, row2).build());
+		mockStatementFor("SELECT id FROM test WHERE id < '4'", MockResult.builder()
+				.rowMetadata(metadata)
+				.row(row1, row2, row3).build());
+		// Create the client
+		DatabaseClient databaseClient = this.databaseClientBuilder.build();
+
+		AtomicInteger invoked = new AtomicInteger();
+		// Assemble a publisher, but don't subscribe yet
+		Mono<List<Integer>> operation = databaseClient
+				.sql(() -> {
+					int idMax = 2 + invoked.incrementAndGet();
+					return String.format("SELECT id FROM test WHERE id < '%s'", idMax);
+				})
+				.map(r -> r.get("id", Integer.class))
+				.all()
+				.collectList();
+
+		assertThat(invoked).as("invoked (before subscription)").hasValue(0);
+
+		List<Integer> rows = operation.block();
+		assertThat(invoked).as("invoked (after 1st subscription)").hasValue(1);
+		assertThat(rows).containsExactly(1, 2);
+
+		rows = operation.block();
+		assertThat(invoked).as("invoked (after 2nd subscription)").hasValue(2);
+		assertThat(rows).containsExactly(1, 2, 3);
+	}
+
+
 	private Statement mockStatement() {
 		return mockStatementFor(null, null);
 	}

spring-test/src/main/java/org/springframework/test/context/DynamicPropertySource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -70,14 +70,15 @@ import java.lang.annotation.Target;
  * class ExampleIntegrationTests {
  *
  *     @Container
- *     static RedisContainer redis = new RedisContainer();
+ *     static GenericContainer redis =
+ *         new GenericContainer("redis:5.0.3-alpine").withExposedPorts(6379);
  *
  *     // ...
  *
  *     @DynamicPropertySource
  *     static void redisProperties(DynamicPropertyRegistry registry) {
- *         registry.add("redis.host", redis::getContainerIpAddress);
- *         registry.add("redis.port", redis::getMappedPort);
+ *         registry.add("redis.host", redis::getHost);
+ *         registry.add("redis.port", redis::getFirstMappedPort);
  *     }
  *
  * }</pre>

spring-test/src/main/java/org/springframework/test/web/client/match/MockRestRequestMatchers.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,6 +47,7 @@ import static org.springframework.test.util.AssertionErrors.fail;
  * @author Craig Walls
  * @author Rossen Stoyanchev
  * @author Sam Brannen
+ * @author Simon Baslé
  * @since 3.2
  */
 public abstract class MockRestRequestMatchers {
@@ -112,8 +113,49 @@ public abstract class MockRestRequestMatchers {
 		return request -> assertEquals("Unexpected request", uri, request.getURI());
 	}
 
+	/**
+	 * Assert request query parameter values with the given Hamcrest matcher,
+	 * matching on the entire {@link List} of values.
+	 * <p>For example, this can be used to check that the list of query parameter
+	 * values has at least one value matching a given Hamcrest matcher (such as
+	 * {@link org.hamcrest.Matchers#hasItem(Matcher)}), that every value in the list
+	 * matches common criteria (such as {@link org.hamcrest.Matchers#everyItem(Matcher)}),
+	 * that each value in the list matches corresponding dedicated criteria
+	 * (such as {@link org.hamcrest.Matchers#contains(Matcher[])}), etc.
+	 * @param name the name of the query parameter whose value(s) will be asserted
+	 * @param matcher the Hamcrest matcher to apply to the entire list of values
+	 * for the given query parameter
+	 * @since 5.3.27
+	 * @see #queryParam(String, Matcher...)
+	 * @see #queryParam(String, String...)
+	 */
+	public static RequestMatcher queryParamList(String name, Matcher<? super List<String>> matcher) {
+		return request -> {
+			MultiValueMap<String, String> params = getQueryParams(request);
+			List<String> paramValues = params.get(name);
+			if (paramValues == null) {
+				fail("Expected query param <" + name + "> to exist but was null");
+			}
+			assertThat("Query param [" + name + "] values", paramValues, matcher);
+		};
+	}
+
 	/**
 	 * Assert request query parameter values with the given Hamcrest matcher(s).
+	 * <p>If the query parameter value list is larger than the number of provided
+	 * {@code matchers}, no matchers will be applied to the extra query parameter
+	 * values, effectively ignoring the additional parameter values. If the number
+	 * of provided {@code matchers} exceeds the number of query parameter values,
+	 * an {@link AssertionError} will be thrown to signal the mismatch.
+	 * <p>See {@link #queryParamList(String, Matcher)} for a variant which accepts a
+	 * {@code Matcher} that applies to the entire list of values as opposed to
+	 * applying only to individual values.
+	 * @param name the name of the query parameter whose value(s) will be asserted
+	 * @param matchers the Hamcrest matchers to apply to individual query parameter
+	 * values; the n<sup>th</sup> matcher is applied to the n<sup>th</sup> query
+	 * parameter value
+	 * @see #queryParamList(String, Matcher)
+	 * @see #queryParam(String, String...)
 	 */
 	@SafeVarargs
 	public static RequestMatcher queryParam(String name, Matcher<? super String>... matchers) {
@@ -128,6 +170,20 @@ public abstract class MockRestRequestMatchers {
 
 	/**
 	 * Assert request query parameter values.
+	 * <p>If the query parameter value list is larger than the number of
+	 * {@code expectedValues}, no assertions will be applied to the extra query
+	 * parameter values, effectively ignoring the additional parameter values. If
+	 * the number of {@code expectedValues} exceeds the number of query parameter
+	 * values, an {@link AssertionError} will be thrown to signal the mismatch.
+	 * <p>See {@link #queryParamList(String, Matcher)} for a variant which accepts a
+	 * Hamcrest {@code Matcher} that applies to the entire list of values as opposed
+	 * to asserting only individual values.
+	 * @param name the name of the query parameter whose value(s) will be asserted
+	 * @param expectedValues the expected values of individual query parameter values;
+	 * the n<sup>th</sup> expected value is compared to the n<sup>th</sup> query
+	 * parameter value
+	 * @see #queryParamList(String, Matcher)
+	 * @see #queryParam(String, Matcher...)
 	 */
 	public static RequestMatcher queryParam(String name, String... expectedValues) {
 		return request -> {
@@ -143,21 +199,47 @@ public abstract class MockRestRequestMatchers {
 		return UriComponentsBuilder.fromUri(request.getURI()).build().getQueryParams();
 	}
 
-	private static void assertValueCount(
-			String valueType, String name, MultiValueMap<String, String> map, int count) {
-
-		List<String> values = map.get(name);
-		String message = "Expected " + valueType + " <" + name + ">";
-		if (values == null) {
-			fail(message + " to exist but was null");
-		}
-		if (count > values.size()) {
-			fail(message + " to have at least <" + count + "> values but found " + values);
-		}
+	/**
+	 * Assert request header values with the given Hamcrest matcher, matching on
+	 * the entire {@link List} of values.
+	 * <p>For example, this can be used to check that the list of header values
+	 * has at least one value matching a given Hamcrest matcher (such as
+	 * {@link org.hamcrest.Matchers#hasItem(Matcher)}), that every value in the list
+	 * matches common criteria (such as {@link org.hamcrest.Matchers#everyItem(Matcher)}),
+	 * that each value in the list matches corresponding dedicated criteria
+	 * (such as {@link org.hamcrest.Matchers#contains(Matcher[])}), etc.
+	 * @param name the name of the header whose value(s) will be asserted
+	 * @param matcher the Hamcrest matcher to apply to the entire list of values
+	 * for the given header
+	 * @since 5.3.27
+	 * @see #header(String, Matcher...)
+	 * @see #header(String, String...)
+	 */
+	public static RequestMatcher headerList(String name, Matcher<? super List<String>> matcher) {
+		return request -> {
+			List<String> headerValues = request.getHeaders().get(name);
+			if (headerValues == null) {
+				fail("Expected header <" + name + "> to exist but was null");
+			}
+			assertThat("Request header [" + name + "] values", headerValues, matcher);
+		};
 	}
 
 	/**
 	 * Assert request header values with the given Hamcrest matcher(s).
+	 * <p>If the header value list is larger than the number of provided
+	 * {@code matchers}, no matchers will be applied to the extra header values,
+	 * effectively ignoring the additional header values. If the number of
+	 * provided {@code matchers} exceeds the number of header values, an
+	 * {@link AssertionError} will be thrown to signal the mismatch.
+	 * <p>See {@link #headerList(String, Matcher)} for a variant which accepts a
+	 * Hamcrest {@code Matcher} that applies to the entire list of values as
+	 * opposed to applying only to individual values.
+	 * @param name the name of the header whose value(s) will be asserted
+	 * @param matchers the Hamcrest matchers to apply to individual header values;
+	 * the n<sup>th</sup> matcher is applied to the n<sup>th</sup> header value
+	 * @see #headerList(String, Matcher)
+	 * @see #header(String, String...)
 	 */
 	@SafeVarargs
 	public static RequestMatcher header(String name, Matcher<? super String>... matchers) {
@@ -173,6 +255,19 @@ public abstract class MockRestRequestMatchers {
 
 	/**
 	 * Assert request header values.
+	 * <p>If the header value list is larger than the number of {@code expectedValues},
+	 * no matchers will be applied to the extra header values, effectively ignoring the
+	 * additional header values. If the number of {@code expectedValues} exceeds the
+	 * number of header values, an {@link AssertionError} will be thrown to signal the
+	 * mismatch.
+	 * <p>See {@link #headerList(String, Matcher)} for a variant which accepts a
+	 * Hamcrest {@code Matcher} that applies to the entire list of values as
+	 * opposed to applying only to individual values.
+	 * @param name the name of the header whose value(s) will be asserted
+	 * @param expectedValues the expected values of individual header values; the
+	 * n<sup>th</sup> expected value is compared to the n<sup>th</sup> header value
+	 * @see #headerList(String, Matcher)
+	 * @see #header(String, Matcher...)
 	 */
 	public static RequestMatcher header(String name, String... expectedValues) {
 		return request -> {
@@ -258,4 +353,18 @@ public abstract class MockRestRequestMatchers {
 		return new XpathRequestMatchers(expression, namespaces, args);
 	}
 
+
+	private static void assertValueCount(
+			String valueType, String name, MultiValueMap<String, String> map, int count) {
+
+		List<String> values = map.get(name);
+		String message = "Expected " + valueType + " <" + name + ">";
+		if (values == null) {
+			fail(message + " to exist but was null");
+		}
+		if (count > values.size()) {
+			fail(message + " to have at least <" + count + "> values but found " + values);
+		}
+	}
+
 }

spring-test/src/main/java/org/springframework/test/web/servlet/htmlunit/MockMvcWebConnection.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2022 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,6 +68,8 @@ public final class MockMvcWebConnection implements WebConnection {
 
 	private WebClient webClient;
 
+	private static int MAX_FORWARDS = 100;
+
 
 	/**
 	 * Create a new instance that assumes the context path of the application
@@ -133,10 +135,15 @@ public final class MockMvcWebConnection implements WebConnection {
 
 		MockHttpServletResponse httpServletResponse = getResponse(requestBuilder);
 		String forwardedUrl = httpServletResponse.getForwardedUrl();
-		while (forwardedUrl != null) {
+		int forwards = 0;
+		while (forwardedUrl != null && forwards < MAX_FORWARDS) {
 			requestBuilder.setForwardPostProcessor(new ForwardRequestPostProcessor(forwardedUrl));
 			httpServletResponse = getResponse(requestBuilder);
 			forwardedUrl = httpServletResponse.getForwardedUrl();
+			forwards += 1;
+		}
+		if (forwards == MAX_FORWARDS) {
+			throw new IllegalStateException("Forwarded more than " + forwards + " times in a row, potential infinite forward loop");
 		}
 		storeCookies(webRequest, httpServletResponse.getCookies());
 

spring-test/src/main/java/org/springframework/test/web/servlet/result/XpathResultMatchers.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -83,7 +83,7 @@ public class XpathResultMatchers {
 	}
 
 	/**
-	 * Get the response encoding if explicitly defined in the response, {code null} otherwise.
+	 * Get the response encoding if explicitly defined in the response, {@code null} otherwise.
 	 */
 	@Nullable
 	private String getDefinedEncoding(MockHttpServletResponse response) {

spring-test/src/main/kotlin/org/springframework/test/web/servlet/MockMvcExtensions.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -224,6 +224,18 @@ fun MockMvc.multipart(urlTemplate: String, vararg vars: Any?, dsl: MockMultipart
 	return MockMultipartHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
 }
 
+/**
+ * [MockMvc] extension providing access to [MockMultipartHttpServletRequestDsl] Kotlin DSL.
+ *
+ * @see MockMvcRequestBuilders.multipart
+ * @author Sebastien Deleuze
+ * @since 5.3.26
+ */
+fun MockMvc.multipart(httpMethod: HttpMethod, urlTemplate: String, vararg vars: Any?, dsl: MockMultipartHttpServletRequestDsl.() -> Unit = {}): ResultActionsDsl {
+	val requestBuilder = MockMvcRequestBuilders.multipart(httpMethod, urlTemplate, *vars)
+	return MockMultipartHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
+}
+
 /**
  * [MockMvc] extension providing access to [MockMultipartHttpServletRequestDsl] Kotlin DSL.
  *
@@ -235,3 +247,15 @@ fun MockMvc.multipart(uri: URI, dsl: MockMultipartHttpServletRequestDsl.() -> Un
 	val requestBuilder = MockMvcRequestBuilders.multipart(uri)
 	return MockMultipartHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
 }
+
+/**
+ * [MockMvc] extension providing access to [MockMultipartHttpServletRequestDsl] Kotlin DSL.
+ *
+ * @see MockMvcRequestBuilders.multipart
+ * @author Sebastien Deleuze
+ * @since 5.3.26
+ */
+fun MockMvc.multipart(httpMethod: HttpMethod, uri: URI, dsl: MockMultipartHttpServletRequestDsl.() -> Unit = {}): ResultActionsDsl {
+	val requestBuilder = MockMvcRequestBuilders.multipart(httpMethod, uri)
+	return MockMultipartHttpServletRequestDsl(requestBuilder).apply(dsl).perform(this)
+}

spring-test/src/test/java/org/springframework/test/web/client/match/MockRestRequestMatchersTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,18 +16,31 @@
 
 package org.springframework.test.web.client.match;
 
+import java.io.IOException;
 import java.net.URI;
 import java.util.Arrays;
-import java.util.Collections;
 import java.util.List;
 
+import org.assertj.core.api.ThrowableTypeAssert;
 import org.junit.jupiter.api.Test;
 
 import org.springframework.http.HttpMethod;
 import org.springframework.mock.http.client.MockClientHttpRequest;
 
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.hamcrest.Matchers.allOf;
+import static org.hamcrest.Matchers.anything;
+import static org.hamcrest.Matchers.contains;
+import static org.hamcrest.Matchers.containsInAnyOrder;
 import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.endsWith;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.everyItem;
+import static org.hamcrest.Matchers.hasItem;
+import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+import static org.hamcrest.Matchers.startsWith;
 
 /**
  * Unit tests for {@link MockRestRequestMatchers}.
@@ -35,179 +48,313 @@ import static org.hamcrest.Matchers.containsString;
  * @author Craig Walls
  * @author Rossen Stoyanchev
  * @author Sam Brannen
+ * @author Simon Baslé
  */
-public class MockRestRequestMatchersTests {
+class MockRestRequestMatchersTests {
 
 	private final MockClientHttpRequest request = new MockClientHttpRequest();
 
 
 	@Test
-	public void requestTo() throws Exception {
+	void requestTo() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/bar"));
 
 		MockRestRequestMatchers.requestTo("http://www.foo.example/bar").match(this.request);
 	}
 
 	@Test  // SPR-15819
-	public void requestToUriTemplate() throws Exception {
+	void requestToUriTemplate() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/bar"));
 
 		MockRestRequestMatchers.requestToUriTemplate("http://www.foo.example/{bar}", "bar").match(this.request);
 	}
 
 	@Test
-	public void requestToNoMatch() throws Exception {
+	void requestToNoMatch() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/bar"));
 
-		assertThatThrownBy(
-			() -> MockRestRequestMatchers.requestTo("http://www.foo.example/wrong").match(this.request))
-				.isInstanceOf(AssertionError.class);
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.requestTo("http://www.foo.example/wrong").match(this.request));
 	}
 
 	@Test
-	public void requestToContains() throws Exception {
+	void requestToContains() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/bar"));
 
 		MockRestRequestMatchers.requestTo(containsString("bar")).match(this.request);
 	}
 
 	@Test
-	public void method() throws Exception {
+	void method() throws Exception {
 		this.request.setMethod(HttpMethod.GET);
 
 		MockRestRequestMatchers.method(HttpMethod.GET).match(this.request);
 	}
 
 	@Test
-	public void methodNoMatch() throws Exception {
+	void methodNoMatch() throws Exception {
 		this.request.setMethod(HttpMethod.POST);
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.method(HttpMethod.GET).match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("expected:<GET> but was:<POST>");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.method(HttpMethod.GET).match(this.request))
+			.withMessageContaining("expected:<GET> but was:<POST>");
 	}
 
 	@Test
-	public void header() throws Exception {
+	void header() throws Exception {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
 
 		MockRestRequestMatchers.header("foo", "bar", "baz").match(this.request);
 	}
 
 	@Test
-	public void headerDoesNotExist() throws Exception {
+	void headerDoesNotExist() throws Exception {
 		MockRestRequestMatchers.headerDoesNotExist(null).match(this.request);
 		MockRestRequestMatchers.headerDoesNotExist("").match(this.request);
 		MockRestRequestMatchers.headerDoesNotExist("foo").match(this.request);
 
 		List<String> values = Arrays.asList("bar", "baz");
 		this.request.getHeaders().put("foo", values);
-		assertThatThrownBy(() -> MockRestRequestMatchers.headerDoesNotExist("foo").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessage("Expected header <foo> not to exist, but it exists with values: " + values);
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.headerDoesNotExist("foo").match(this.request))
+			.withMessage("Expected header <foo> not to exist, but it exists with values: " + values);
 	}
 
 	@Test
-	public void headerMissing() throws Exception {
-		assertThatThrownBy(() -> MockRestRequestMatchers.header("foo", "bar").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("was null");
+	void headerMissing() {
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.header("foo", "bar").match(this.request))
+			.withMessageContaining("was null");
 	}
 
 	@Test
-	public void headerMissingValue() throws Exception {
+	void headerMissingValue() {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.header("foo", "bad").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("expected:<bad> but was:<bar>");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.header("foo", "bad").match(this.request))
+			.withMessageContaining("expected:<bad> but was:<bar>");
 	}
 
 	@Test
-	public void headerContains() throws Exception {
+	void headerContains() throws Exception {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
 
 		MockRestRequestMatchers.header("foo", containsString("ba")).match(this.request);
 	}
 
 	@Test
-	public void headerContainsWithMissingHeader() throws Exception {
-		assertThatThrownBy(() -> MockRestRequestMatchers.header("foo", containsString("baz")).match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("but was null");
+	void headerContainsWithMissingHeader() {
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.header("foo", containsString("baz")).match(this.request))
+			.withMessage("Expected header <foo> to exist but was null");
 	}
 
 	@Test
-	public void headerContainsWithMissingValue() throws Exception {
+	void headerContainsWithMissingValue() {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.header("foo", containsString("bx")).match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("was \"bar\"");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.header("foo", containsString("bx")).match(this.request))
+			.withMessageContaining("was \"bar\"");
 	}
 
 	@Test
-	public void headers() throws Exception {
+	void headerListMissing() {
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.headerList("foo", hasSize(2)).match(this.request))
+			.withMessage("Expected header <foo> to exist but was null");
+	}
+
+	@Test
+	void headerListMatchers() throws IOException {
+		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
+
+		MockRestRequestMatchers.headerList("foo", containsInAnyOrder(endsWith("baz"), endsWith("bar"))).match(this.request);
+		MockRestRequestMatchers.headerList("foo", contains(is("bar"), is("baz"))).match(this.request);
+		MockRestRequestMatchers.headerList("foo", contains(is("bar"), anything())).match(this.request);
+		MockRestRequestMatchers.headerList("foo", hasItem(endsWith("baz"))).match(this.request);
+		MockRestRequestMatchers.headerList("foo", everyItem(startsWith("ba"))).match(this.request);
+		MockRestRequestMatchers.headerList("foo", hasSize(2)).match(this.request);
+
+		MockRestRequestMatchers.headerList("foo", notNullValue()).match(this.request);
+		MockRestRequestMatchers.headerList("foo", is(anything())).match(this.request);
+		MockRestRequestMatchers.headerList("foo", allOf(notNullValue(), notNullValue())).match(this.request);
+
+		MockRestRequestMatchers.headerList("foo", allOf(notNullValue(), hasSize(2))).match(this.request);
+	}
+
+	@Test
+	void headerListContainsMismatch() {
+		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
+
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.headerList("foo", contains(containsString("ba"))).match(this.request))
+			.withMessageContainingAll(
+					"Request header [foo] values",
+					"Expected: iterable containing [a string containing \"ba\"]",
+					"but: not matched: \"baz\"");
+
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.headerList("foo", hasItem(endsWith("ba"))).match(this.request))
+			.withMessageContainingAll(
+					"Request header [foo] values",
+					"Expected: a collection containing a string ending with \"ba\"",
+					"but: mismatches were: [was \"bar\", was \"baz\"]");
+
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.headerList("foo", everyItem(endsWith("ar"))).match(this.request))
+			.withMessageContainingAll(
+					"Request header [foo] values",
+					"Expected: every item is a string ending with \"ar\"",
+					"but: an item was \"baz\"");
+	}
+
+	@Test
+	void headerListDoesntHideHeaderWithSingleMatcher() throws IOException {
+		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
+
+		MockRestRequestMatchers.header("foo", equalTo("bar")).match(this.request);
+
+		assertThatAssertionError()
+				.isThrownBy(() -> MockRestRequestMatchers.headerList("foo", equalTo("bar")).match(this.request))
+				.withMessageContainingAll(
+						"Request header [foo] values",
+						"Expected: \"bar\"",
+						"but: was <[bar, baz]>");
+	}
+
+	@Test
+	void headers() throws Exception {
 		this.request.getHeaders().put("foo", Arrays.asList("bar", "baz"));
 
 		MockRestRequestMatchers.header("foo", "bar", "baz").match(this.request);
 	}
 
 	@Test
-	public void headersWithMissingHeader() throws Exception {
-		assertThatThrownBy(() -> MockRestRequestMatchers.header("foo", "bar").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("but was null");
+	void headersWithMissingHeader() {
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.header("foo", "bar").match(this.request))
+			.withMessage("Expected header <foo> to exist but was null");
 	}
 
 	@Test
-	public void headersWithMissingValue() throws Exception {
-		this.request.getHeaders().put("foo", Collections.singletonList("bar"));
+	void headersWithMissingValue() {
+		this.request.getHeaders().put("foo", Arrays.asList("bar"));
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.header("foo", "bar", "baz").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("to have at least <2> values");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.header("foo", "bar", "baz").match(this.request))
+			.withMessageContaining("to have at least <2> values");
 	}
 
 	@Test
-	public void queryParam() throws Exception {
+	void queryParam() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/a?foo=bar&foo=baz"));
 
 		MockRestRequestMatchers.queryParam("foo", "bar", "baz").match(this.request);
 	}
 
 	@Test
-	public void queryParamMissing() throws Exception {
+	void queryParamMissing() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/a"));
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.queryParam("foo", "bar").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("but was null");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParam("foo", "bar").match(this.request))
+			.withMessage("Expected query param <foo> to exist but was null");
 	}
 
 	@Test
-	public void queryParamMissingValue() throws Exception {
+	void queryParamMissingValue() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/a?foo=bar&foo=baz"));
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.queryParam("foo", "bad").match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("expected:<bad> but was:<bar>");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParam("foo", "bad").match(this.request))
+			.withMessageContaining("expected:<bad> but was:<bar>");
 	}
 
 	@Test
-	public void queryParamContains() throws Exception {
+	void queryParamContains() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/a?foo=bar&foo=baz"));
 
 		MockRestRequestMatchers.queryParam("foo", containsString("ba")).match(this.request);
 	}
 
 	@Test
-	public void queryParamContainsWithMissingValue() throws Exception {
+	void queryParamContainsWithMissingValue() throws Exception {
 		this.request.setURI(new URI("http://www.foo.example/a?foo=bar&foo=baz"));
 
-		assertThatThrownBy(() -> MockRestRequestMatchers.queryParam("foo", containsString("bx")).match(this.request))
-			.isInstanceOf(AssertionError.class)
-			.hasMessageContaining("was \"bar\"");
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParam("foo", containsString("bx")).match(this.request))
+			.withMessageContaining("was \"bar\"");
+	}
+
+	@Test
+	void queryParamListMissing() {
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParamList("foo", hasSize(2)).match(this.request))
+			.withMessage("Expected query param <foo> to exist but was null");
+	}
+
+	@Test
+	void queryParamListMatchers() throws IOException {
+		this.request.setURI(URI.create("http://www.foo.example/a?foo=bar&foo=baz"));
+
+		MockRestRequestMatchers.queryParamList("foo", containsInAnyOrder(endsWith("baz"), endsWith("bar"))).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", contains(is("bar"), is("baz"))).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", contains(is("bar"), anything())).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", hasItem(endsWith("baz"))).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", everyItem(startsWith("ba"))).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", hasSize(2)).match(this.request);
+
+		MockRestRequestMatchers.queryParamList("foo", notNullValue()).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", is(anything())).match(this.request);
+		MockRestRequestMatchers.queryParamList("foo", allOf(notNullValue(), notNullValue())).match(this.request);
+
+		MockRestRequestMatchers.queryParamList("foo", allOf(notNullValue(), hasSize(2))).match(this.request);
+	}
+
+	@Test
+	void queryParamListContainsMismatch() {
+		this.request.setURI(URI.create("http://www.foo.example/a?foo=bar&foo=baz"));
+
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParamList("foo", contains(containsString("ba"))).match(this.request))
+			.withMessageContainingAll(
+				"Query param [foo] values",
+				"Expected: iterable containing [a string containing \"ba\"]",
+				"but: not matched: \"baz\"");
+
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParamList("foo", hasItem(endsWith("ba"))).match(this.request))
+			.withMessageContainingAll(
+				"Query param [foo] values",
+				"Expected: a collection containing a string ending with \"ba\"",
+				"but: mismatches were: [was \"bar\", was \"baz\"]");
+
+		assertThatAssertionError()
+			.isThrownBy(() -> MockRestRequestMatchers.queryParamList("foo", everyItem(endsWith("ar"))).match(this.request))
+			.withMessageContainingAll(
+				"Query param [foo] values",
+				"Expected: every item is a string ending with \"ar\"",
+				"but: an item was \"baz\"");
+	}
+
+	@Test
+	void queryParamListDoesntHideQueryParamWithSingleMatcher() throws IOException {
+		this.request.setURI(URI.create("http://www.foo.example/a?foo=bar&foo=baz"));
+
+		MockRestRequestMatchers.queryParam("foo", equalTo("bar")).match(this.request);
+
+		assertThatAssertionError()
+				.isThrownBy(() -> MockRestRequestMatchers.queryParamList("foo", equalTo("bar")).match(this.request))
+				.withMessageContainingAll(
+						"Query param [foo] values",
+						"Expected: \"bar\"",
+						"but: was <[bar, baz]>");
+	}
+
+	private static ThrowableTypeAssert<AssertionError> assertThatAssertionError() {
+		return assertThatExceptionOfType(AssertionError.class);
 	}
 
 }

spring-test/src/test/java/org/springframework/test/web/servlet/htmlunit/ForwardController.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,4 +31,9 @@ public class ForwardController {
 		return "forward:/a";
 	}
 
+	@RequestMapping("/infiniteForward")
+	public String infiniteForward() {
+		return "forward:/infiniteForward";
+	}
+
 }