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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist.util.proxy;
import java.lang.reflect.Method;
/**
* The interface implemented by the invocation handler of a proxy
* instance.
*
* @see Proxy#setHandler(MethodHandler)
*/
public interface MethodHandler {
/**
* Is called when a method is invoked on a proxy instance associated
* with this handler. This method must process that method invocation.
*
* @param self the proxy instance.
* @param thisMethod the overridden method declared in the super
* class or interface.
* @param proceed the forwarder method for invoking the overridden
* method. It is null if the overridden method is
* abstract or declared in the interface.
* @param args an array of objects containing the values of
* the arguments passed in the method invocation
* on the proxy instance. If a parameter type is
* a primitive type, the type of the array element
* is a wrapper class.
* @return the resulting value of the method invocation.
*
* @throws Throwable if the method invocation fails.
*/
Object invoke(Object self, Method thisMethod, Method proceed,
Object[] args) throws Throwable;
}
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