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: 1.4 $ $Date: 2004/02/25 00:01:05 $
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 }