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     * Represents a method invocation.
024     * 
025     * @author James Carman
026     * @since 1.0
027     */
028    public interface Invocation
029    {
030        /**
031         * Returns the method being called.
032         * @return the method being called
033         */
034        public Method getMethod();
035    
036        /**
037         * Returns the arguments being passed to this method invocation.  Changes in the elements of this array will be
038         * propagated to the recipient of this invocation.
039         * 
040         * @return the arguments being passed to this method invocation
041         */
042        public Object[] getArguments();
043    
044        /**
045         * Returns the proxy object on which this invocation was invoked.
046         * @return the proxy object on which this invocation was invoked
047         */
048        public Object getProxy();
049    
050        /**
051         * Called in order to let the invocation proceed.
052         * @return the return value of the invocation
053         * @throws Throwable any exception or error that was thrown as a result of this invocation
054         */
055        public Object proceed() throws Throwable;
056    }