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    package org.apache.commons.chain.impl;
018    
019    
020    import org.apache.commons.chain.Chain;
021    import org.apache.commons.chain.Command;
022    import org.apache.commons.chain.Context;
023    
024    
025    /**
026     * <p>Implementation of {@link Command} that logs its identifier and
027     * and attempts to add a new {@link Command} to the {@link Chain}.  This
028     * should cause an IllegalStateException if the {@link Chain} implementation
029     * subclasses <code>ChainBase</code>.</p>
030     *
031     * @author Craig R. McClanahan
032     * @version $Revision: 480477 $ $Date: 2006-11-29 08:34:52 +0000 (Wed, 29 Nov 2006) $
033     */
034    
035    public class AddingCommand extends NonDelegatingCommand {
036    
037    
038        // ------------------------------------------------------------ Constructor
039    
040    
041        public AddingCommand() {
042        this("", null);
043        }
044    
045        // Construct an instance that will log the specified identifier
046        public AddingCommand(String id, Chain parent) {
047            super(id);
048            this.parent = parent;
049        }
050    
051    
052        // The parent Chain
053        private Chain parent = null;
054    
055    
056        // -------------------------------------------------------- Command Methods
057    
058    
059        // Execution method for this Command
060        public boolean execute(Context context, Chain chain) throws Exception {
061    
062            super.execute(context);
063            parent.addCommand(new NonDelegatingCommand("NEW")); // Should cause ISE
064            return (true);
065    
066        }
067    
068    
069    }