From 6e6280a42c6ed3c9446f23bdf2981e6dd51c93ce Mon Sep 17 00:00:00 2001
From: Brian Clozel <brian.clozel@broadcom.com>
Date: Wed, 25 Jun 2025 20:43:48 +0200
Subject: [PATCH] Disallow @org.jetbrains.annotations.Nullable imports

This commit adds a checkstyle rule that rejects
`@org.jetbrains.annotations.Nullable` imports in the source code.

See gh-35114
---
 src/checkstyle/checkstyle.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/checkstyle/checkstyle.xml b/src/checkstyle/checkstyle.xml
index d7ba423332f..a0e0b8d47f4 100644
--- a/src/checkstyle/checkstyle.xml
+++ b/src/checkstyle/checkstyle.xml
@@ -107,7 +107,7 @@
 			<property name="id" value="bannedImports"/>
 			<property name="regexp" value="true"/>
 			<property name="illegalClasses"
-				value="^reactor\.core\.support\.Assert,^org\.slf4j\.LoggerFactory,^(?!org\.jspecify|\.annotations).*(NonNull|Nullable)$"/>
+				value="^reactor\.core\.support\.Assert,^org\.slf4j\.LoggerFactory,^(?!org\.jspecify|\.annotations).*(NonNull|Nullable),^org\.jetbrains\.annotations\.Nullable$"/>
 		</module>
 		<module name="com.puppycrawl.tools.checkstyle.checks.imports.IllegalImportCheck">
 			<property name="id" value="bannedJUnit3Imports"/>