From 76239d083b6b8622c0de174527b6e9b518ad0933 Mon Sep 17 00:00:00 2001
From: rstoyanchev <rossen.stoyanchev@broadcom.com>
Date: Wed, 19 Aug 2026 10:52:35 +0300
Subject: [PATCH] Make getMessageBuilder in Protobuf decoders protected

Closes gh-37147
---
 .../springframework/http/codec/protobuf/ProtobufDecoder.java    | 2 +-
 .../http/codec/protobuf/ProtobufHttpMessageWriter.java          | 2 +-
 .../http/codec/protobuf/ProtobufJsonDecoder.java                | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufDecoder.java b/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufDecoder.java
index 442e255d02c..72e2a954aa8 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufDecoder.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufDecoder.java
@@ -189,7 +189,7 @@ public class ProtobufDecoder extends ProtobufCodecSupport implements Decoder<Mes
 	 * Create a new {@code Message.Builder} instance for the given class.
 	 * <p>This method uses a ConcurrentHashMap for caching method lookups.
 	 */
-	private static Message.Builder getMessageBuilder(Class<?> clazz) throws Exception {
+	protected static Message.Builder getMessageBuilder(Class<?> clazz) throws Exception {
 		Method method = methodCache.get(clazz);
 		if (method == null) {
 			method = clazz.getMethod("newBuilder");
diff --git a/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufHttpMessageWriter.java b/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufHttpMessageWriter.java
index 103c5dea6fc..4a132503f30 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufHttpMessageWriter.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufHttpMessageWriter.java
@@ -122,7 +122,7 @@ public class ProtobufHttpMessageWriter extends EncoderHttpMessageWriter<Message>
 	 * Create a new {@code Message.Builder} instance for the given class.
 	 * <p>This method uses a ConcurrentHashMap for caching method lookups.
 	 */
-	private static Message.Builder getMessageBuilder(Class<?> clazz) throws Exception {
+	protected static Message.Builder getMessageBuilder(Class<?> clazz) throws Exception {
 		Method method = methodCache.get(clazz);
 		if (method == null) {
 			method = clazz.getMethod("newBuilder");
diff --git a/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufJsonDecoder.java b/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufJsonDecoder.java
index 0bb13897dea..de5dd6cee05 100644
--- a/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufJsonDecoder.java
+++ b/spring-web/src/main/java/org/springframework/http/codec/protobuf/ProtobufJsonDecoder.java
@@ -161,7 +161,7 @@ public class ProtobufJsonDecoder implements Decoder<Message> {
 	 * Create a new {@code Message.Builder} instance for the given class.
 	 * <p>This method uses a ConcurrentHashMap for caching method lookups.
 	 */
-	private static Message.Builder getMessageBuilder(Class<?> clazz) throws Exception {
+	protected static Message.Builder getMessageBuilder(Class<?> clazz) throws Exception {
 		Method method = methodCache.get(clazz);
 		if (method == null) {
 			method = clazz.getMethod("newBuilder");