1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package javax.faces.event;
20
21 import javax.faces.component.UIComponent;
22
23 /**
24 * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>
25 */
26 public class ValueChangeEvent extends FacesEvent
27 {
28 private static final long serialVersionUID = -2490528664421353795L;
29 // FIELDS
30 private Object _oldValue;
31 private Object _newValue;
32
33 // CONSTRUCTORS
34 public ValueChangeEvent(UIComponent uiComponent, Object oldValue, Object newValue)
35 {
36 super(uiComponent);
37 if (uiComponent == null)
38 {
39 throw new IllegalArgumentException("uiComponent");
40 }
41 _oldValue = oldValue;
42 _newValue = newValue;
43 }
44
45 // METHODS
46 public Object getNewValue()
47 {
48 return _newValue;
49 }
50
51 public Object getOldValue()
52 {
53 return _oldValue;
54 }
55
56 @Override
57 public boolean isAppropriateListener(FacesListener facesListeners)
58 {
59 return facesListeners instanceof ValueChangeListener;
60 }
61
62 @Override
63 public void processListener(FacesListener facesListeners)
64 {
65 ((ValueChangeListener)facesListeners).processValueChange(this);
66 }
67 }