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Java > Open Source Codes > javax > faces > event > ValueChangeEvent


1 /*
2  * Copyright 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 javax.faces.event;
17
18 import javax.faces.component.UIComponent;
19
20 /**
21   * @author Thomas Spiegl (latest modification by $Author: mwessendorf $)
22   * @version $Revision: 1.4 $ $Date: 2004/07/01 22:01:14 $
23 */
24 public class ValueChangeEvent extends FacesEvent {
25
26     // FIELDS
27 private Object JavaDoc _oldValue;
28     private Object JavaDoc _newValue;
29
30     // CONSTRUCTORS
31 public ValueChangeEvent(UIComponent uiComponent, Object JavaDoc oldValue, Object JavaDoc newValue)
32     {
33         super(uiComponent);
34         if (uiComponent == null) throw new IllegalArgumentException JavaDoc("uiComponent");
35         _oldValue = oldValue;
36         _newValue = newValue;
37     }
38
39     // METHODS
40 public Object JavaDoc getNewValue()
41     {
42         return _newValue;
43     }
44
45     public Object JavaDoc getOldValue()
46     {
47         return _oldValue;
48     }
49
50     public boolean isAppropriateListener(FacesListener facesListeners)
51     {
52         return facesListeners instanceof ValueChangeListener;
53     }
54
55     public void processListener(FacesListener facesListeners)
56     {
57         ((ValueChangeListener)facesListeners).processValueChange(this);
58     }
59 }
60
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