001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018 package org.apache.commons.proxy; 019 020 import java.lang.reflect.Method; 021 022 /** 023 * An invoker is responsible for handling a method invocation. 024 * 025 * @author James Carman 026 * @since 1.0 027 */ 028 public interface Invoker 029 { 030 /** 031 * "Invokes" the method. Implementation should throw a {@link org.apache.commons.proxy.exception.InvokerException} 032 * if problems arise while trying to invoke the method. 033 * @param proxy the proxy object 034 * @param method the method being invoked 035 * @param arguments the arguments 036 * @return the return value 037 * @throws Throwable thrown by the implementation 038 */ 039 public Object invoke( Object proxy, Method method, Object[] arguments ) throws Throwable; 040 }