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Java > Open Source Codes > nextapp > echo2 > app > update > PropertyUpdate


1 /*
2  * This file is part of the Echo Web Application Framework (hereinafter "Echo").
3  * Copyright (C) 2002-2005 NextApp, Inc.
4  *
5  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
6  *
7  * The contents of this file are subject to the Mozilla Public License Version
8  * 1.1 (the "License"); you may not use this file except in compliance with
9  * the License. You may obtain a copy of the License at
10  * http://www.mozilla.org/MPL/
11  *
12  * Software distributed under the License is distributed on an "AS IS" basis,
13  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14  * for the specific language governing rights and limitations under the
15  * License.
16  *
17  * Alternatively, the contents of this file may be used under the terms of
18  * either the GNU General Public License Version 2 or later (the "GPL"), or
19  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20  * in which case the provisions of the GPL or the LGPL are applicable instead
21  * of those above. If you wish to allow use of your version of this file only
22  * under the terms of either the GPL or the LGPL, and not to allow others to
23  * use your version of this file under the terms of the MPL, indicate your
24  * decision by deleting the provisions above and replace them with the notice
25  * and other provisions required by the GPL or the LGPL. If you do not delete
26  * the provisions above, a recipient may use your version of this file under
27  * the terms of any one of the MPL, the GPL or the LGPL.
28  */
29
30 package nextapp.echo2.app.update;
31
32 import java.io.Serializable JavaDoc;
33
34 /**
35  * A description of an update to a property of an object.
36  */
37 public class PropertyUpdate
38 implements Serializable JavaDoc {
39     
40     private Object JavaDoc newValue;
41     private Object JavaDoc oldValue;
42     
43     /**
44      * Creates a new <code>ProeprtyUpdate</code>.
45      *
46      * @param oldValue the previous value of the property
47      * @param newValue the new value of the property
48      */
49     PropertyUpdate(Object JavaDoc oldValue, Object JavaDoc newValue) {
50         super();
51         this.oldValue = oldValue;
52         this.newValue = newValue;
53     }
54     
55     /**
56      * Returns the new value of the property.
57      *
58      * @return the new value
59      */
60     public Object JavaDoc getNewValue() {
61         return newValue;
62     }
63     
64     /**
65      * Returns the previous value of the property.
66      *
67      * @return the previous value
68      */
69     public Object JavaDoc getOldValue() {
70         return oldValue;
71     }
72     
73     /**
74      * Display a debug representation.
75      *
76      * @see java.lang.Object#toString()
77      */
78     public String JavaDoc toString() {
79         return oldValue + "->" + newValue;
80     }
81 }
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