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backported Java 6 visibility bridge method pair (SPR-8660)

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This commit is contained in:
Juergen Hoeller
2011-12-01 13:12:59 +00:00
parent 0150000d8b
commit c2997f4dd9
2 changed files with 32 additions and 15 deletions
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21
org.springframework.core/src/main/java/org/springframework/core/BridgeMethodResolver.java
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@@ -1,5 +1,5 @@
/*
* Copyright 2002-2009 the original author or authors.
* Copyright 2002-2011 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.Arrays;
import java.util.List;
import java.util.Map;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;
import org.springframework.util.ReflectionUtils;
@@ -210,4 +211,22 @@ public abstract class BridgeMethodResolver {
return ReflectionUtils.findMethod(type, bridgeMethod.getName(), bridgeMethod.getParameterTypes());
}
/**
* Compare the signatures of the bridge method and the method which it bridges. If
* the parameter and return types are the same, it is a 'visibility' bridge method
* introduced in Java 6 to fix http://bugs.sun.com/view_bug.do?bug_id=6342411.
* See also http://stas-blogspot.blogspot.com/2010/03/java-bridge-methods-explained.html
* @return whether signatures match as described
*/
public static boolean isVisibilityBridgeMethodPair(Method bridgeMethod, Method bridgedMethod) {
Assert.isTrue(bridgeMethod != null);
Assert.isTrue(bridgedMethod != null);
if (bridgeMethod == bridgedMethod) {
return true;
}
return Arrays.equals(bridgeMethod.getParameterTypes(), bridgedMethod.getParameterTypes()) &&
bridgeMethod.getReturnType().equals(bridgedMethod.getReturnType());
}
}