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    }