| StateChangedServiceImpl.java |
1 /*
2 * Copyright 2000-2001,2004 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
17 /*
18
19 */
20
21 package org.apache.wsrp4j.util;
22
23 import java.util.ArrayList;
24 import java.util.Iterator;
25
26 /**
27 * This class implements the StateChangedService interface and is
28 * the parent of all classes with StateChangeService functionality.
29 *
30 * @author <a href="mailto:Ralf.Altrichter@de.ibm.com">Ralf Altrichter</a>
31 *
32 * @version 1.0
33 */
34
35 public class StateChangedServiceImpl implements StateChangedService {
36
37 // internal list of StateChangedListeners
38 private ArrayList _listeners = new ArrayList();
39
40 /**
41 * Constructor
42 */
43 public StateChangedServiceImpl() {
44
45 }
46
47 /**
48 * Adds a StateChangedListener object to the internal
49 * array list.
50 *
51 * @param changeListener to be added
52 */
53 public void addListener(StateChangedListener changeListener) {
54
55 _listeners.add(changeListener);
56
57 }
58
59 /**
60 * Notifies all registered listeners by calling the
61 * stateChanged(StateChangedEvent e) method on the
62 * target object.
63 */
64 public void stateChanged() {
65 Iterator iterator = _listeners.iterator();
66 while (iterator.hasNext()) {
67 StateChangedListener listener = (StateChangedListener) iterator
68 .next();
69 listener.stateChanged(new StateChangedEvent(this));
70 }
71 }
72 }