org.springframework.core

Class BridgeMethodResolver

java.lang.Object

org.springframework.core.BridgeMethodResolver

public final class BridgeMethodResolver
extends java.lang.Object

Helper for resolving synthetic bridge Methods to the Method being bridged.

Given a synthetic bridge Method returns the Method being bridged. A bridge method may be created by the compiler when extending a parameterized type whose methods have parameterized arguments. During runtime invocation the bridge Method may be invoked and/or used via reflection. When attempting to locate annotations on Methods, it is wise to check for bridge Methods as appropriate and find the bridged Method.

See The Java Language Specification for more details on the use of bridge methods.

Since:

2.0

Author:

Rob Harrop, Juergen Hoeller, Phillip Webb

Method Summary

Modifier and Type	Method and Description
static java.lang.reflect.Method	findBridgedMethod(java.lang.reflect.Method bridgeMethod) Find the original method for the supplied bridge Method.
static boolean	isVisibilityBridgeMethodPair(java.lang.reflect.Method bridgeMethod, java.lang.reflect.Method bridgedMethod) Compare the signatures of the bridge method and the method which it bridges.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

findBridgedMethod

public static java.lang.reflect.Method findBridgedMethod(java.lang.reflect.Method bridgeMethod)

Find the original method for the supplied bridge Method.

It is safe to call this method passing in a non-bridge Method instance. In such a case, the supplied Method instance is returned directly to the caller. Callers are not required to check for bridging before calling this method.

Parameters:

bridgeMethod - the method to introspect

Returns:

the original method (either the bridged method or the passed-in method if no more specific one could be found)

isVisibilityBridgeMethodPair

public static boolean isVisibilityBridgeMethodPair(java.lang.reflect.Method bridgeMethod,
                                                   java.lang.reflect.Method bridgedMethod)

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

Returns:

whether signatures match as described