1 /***
2 * CacheEvent.java
3 *
4 * This file is part of the creme library.
5 * The creme library intends to ease the development effort of large
6 * applications by providing easy to use support classes.
7 *
8 * Copyright (C) 2002 Denis Bregeon
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 * contact information: dbregeon@sourceforge.net
25 */
26 package org.jcreme.caches;
27
28 import java.util.EventObject;
29
30 /***
31 * Instances of this class report modifications in the contents of a cache.
32 * Namely elements added and removed from the cache.
33 *
34 * @author $Author: dbregeon $
35 * @version $Revision: 1.2 $
36 */
37 public class CacheEvent extends EventObject {
38 static final long serialVersionUID = -5836842452610798387L;
39 /***
40 * The element subject of the modification in the cache.
41 */
42 private final Object element;
43
44 /***
45 * Creates new CacheEvent
46 *
47 * @param source
48 * the cache that sent the event.
49 * @param element
50 * the object that provoked the event.
51 */
52 public CacheEvent(Object source, Object element) {
53 super(source);
54 this.element = element;
55 }
56
57 /***
58 * Enables access to the element that provoked the event.
59 *
60 * @return the object which status changed in the cache.
61 */
62 public Object getElement() {
63 return this.element;
64 }
65 }