org.springframework.cglib.proxy.CallbackFilter Maven / Gradle / Ivy
/*
* Copyright 2003,2004 The Apache Software Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.cglib.proxy;
import java.lang.reflect.Method;
/**
* Map methods of subclasses generated by {@link Enhancer} to a particular
* callback. The type of the callbacks chosen for each method affects
* the bytecode generated for that method in the subclass, and cannot
* change for the life of the class.
* Note: {@link CallbackFilter} implementations are supposed to be
* lightweight as cglib might keep {@link CallbackFilter} objects
* alive to enable caching of generated classes. Prefer using {@code static}
* classes for implementation of {@link CallbackFilter}.
*/
public interface CallbackFilter {
/**
* Map a method to a callback.
* @param method the intercepted method
* @return the index into the array of callbacks (as specified by {@link Enhancer#setCallbacks}) to use for the method,
*/
int accept(Method method);
/**
* The CallbackFilter in use affects which cached class
* the Enhancer will use, so this is a reminder that
* you should correctly implement equals and
* hashCode for custom CallbackFilter
* implementations in order to improve performance.
*/
@Override
boolean equals(Object o);
}