1   /*
2    * Copyright 1999-2004 The Apache Software Foundation
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.chain.impl;
17  
18  
19  import org.apache.commons.chain.Chain;
20  import org.apache.commons.chain.Command;
21  import org.apache.commons.chain.Context;
22  
23  
24  /***
25   * <p>Implementation of {@link Command} that logs its identifier and
26   * and attempts to add a new {@link Command} to the {@link Chain}.  This
27   * should cause an IllegalStateException if the {@link Chain} implementation
28   * subclasses <code>ChainBase</code>.</p>
29   *
30   * @author Craig R. McClanahan
31   * @version $Revision: 155403 $ $Date: 2005-02-26 12:52:46 +0000 (Sat, 26 Feb 2005) $
32   */
33  
34  public class AddingCommand extends NonDelegatingCommand {
35  
36  
37      // ------------------------------------------------------------ Constructor
38  
39  
40      public AddingCommand() {
41      this("", null);
42      }
43  
44      // Construct an instance that will log the specified identifier
45      public AddingCommand(String id, Chain parent) {
46          super(id);
47          this.parent = parent;
48      }
49  
50  
51      // The parent Chain
52      private Chain parent = null;
53  
54  
55      // -------------------------------------------------------- Command Methods
56  
57  
58      // Execution method for this Command
59      public boolean execute(Context context, Chain chain) throws Exception {
60  
61          super.execute(context);
62          parent.addCommand(new NonDelegatingCommand("NEW")); // Should cause ISE
63          return (true);
64  
65      }
66  
67  
68  }