From dcee218caceaa27e9d7d79dea812274d900a8914 Mon Sep 17 00:00:00 2001
From: Josh Cummings <3627351+jzheaux@users.noreply.github.com>
Date: Fri, 31 Jul 2026 13:38:57 -0600
Subject: [PATCH] Use jspecify Nullable in DPoPProofReplayValidator

org.springframework.lang.Nullable is banned by the
bannedNullabilityImports checkstyle rule on this line; the embargoed
commit that introduced this file predates that rule's adoption here.
Switch to org.jspecify.annotations.Nullable to match the rest of the
codebase (already used correctly elsewhere in this same file).

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>
---
 .../security/oauth2/jwt/DPoPProofReplayValidator.java           | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/DPoPProofReplayValidator.java b/oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/DPoPProofReplayValidator.java
index ca13866e56..04d782b80e 100644
--- a/oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/DPoPProofReplayValidator.java
+++ b/oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/DPoPProofReplayValidator.java
@@ -30,10 +30,10 @@ import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 import com.nimbusds.jose.jwk.JWK;
+import org.jspecify.annotations.Nullable;
 
 import org.springframework.cache.Cache;
 import org.springframework.cache.support.SimpleValueWrapper;
-import org.springframework.lang.Nullable;
 import org.springframework.security.oauth2.core.OAuth2Error;
 import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
 import org.springframework.security.oauth2.core.OAuth2TokenValidator;