01: /*
02: * Copyright 2000-2001,2004 The Apache Software Foundation.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
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: }
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