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 */ 017package org.apache.commons.chain.impl; 018 019import org.apache.commons.chain.Chain; 020import org.apache.commons.chain.Command; 021import org.apache.commons.chain.Context; 022 023/** 024 * Implementation of {@link Command} that logs its identifier and 025 * and delegates to the rest of the chain. 026 * 027 * @author Craig R. McClanahan 028 * @version $Revision$ $Date$ 029 */ 030public class DelegatingCommand extends NonDelegatingCommand { 031 032 // ------------------------------------------------------------ Constructor 033 034 public DelegatingCommand() { 035 this(""); 036 } 037 038 /** 039 * Construct an instance that will log the specified identifier 040 * 041 * @param id identifier to log for this Command instance 042 */ 043 public DelegatingCommand(String id) { 044 super(id); 045 } 046 047 // -------------------------------------------------------- Command Methods 048 049 /** 050 * Execution method for this Command 051 * 052 * @param context The {@link Context} to be processed by this 053 * {@link Command} 054 * 055 * @return {@code true} if the processing of this {@link Context} 056 * has been completed, or {@code false} if the processing 057 * of this {@link Context} should be delegated to a 058 * subsequent {@link Command} in an enclosing {@link Chain} 059 * 060 * @throws Exception general purpose exception return 061 * to indicate abnormal termination 062 * @throws IllegalArgumentException if {@code context} 063 * is {@code null} 064 */ 065 @Override 066 public boolean execute(Context context) throws Exception { 067 super.execute(context); 068 return false; 069 } 070}