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Java > Open Source Codes > com > caucho > amber > query > CacheUpdate


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free Software Foundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.amber.query;
30
31 import com.caucho.amber.entity.Entity;
32
33 /**
34  * Callback when an entity is created, destroyed or modified.
35  */
36 abstract public class CacheUpdate {
37   private CachedQuery _query;
38
39   protected CacheUpdate(CachedQuery query)
40   {
41     _query = query;
42   }
43
44   /**
45    * Called when an entity is added.
46    */
47   public void add(Entity obj)
48   {
49     update();
50   }
51
52   /**
53    * Called when an entity is deleted.
54    */
55   public void delete(Object JavaDoc key)
56   {
57     update();
58   }
59
60   /**
61    * Called when an entity is deleted.
62    */
63   public void update(Entity object)
64   {
65     update();
66   }
67   
68   /**
69    * Update the query.
70    */
71   protected void update()
72   {
73     _query.update();
74   }
75 }
76
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