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Java > Open Source Codes > com > caucho > ejb > entity > EntityKey


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 SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.ejb.entity;
30
31 /**
32  * Key to handle the merged identity hash code.
33  */
34 public class EntityKey {
35   private EntityServer _server;
36   private Object JavaDoc _primaryKey;
37
38   public EntityKey()
39   {
40   }
41
42   public EntityKey(EntityServer server, Object JavaDoc key)
43   {
44     _server = server;
45     _primaryKey = key;
46   }
47
48   public void init(EntityServer server, Object JavaDoc key)
49   {
50     _server = server;
51     _primaryKey = key;
52   }
53
54   /**
55    * Returns the hash.
56    */
57   public int hashCode()
58   {
59     return 65521 * System.identityHashCode(_server) + _primaryKey.hashCode();
60   }
61
62   /**
63    * Returns equality.
64    */
65   public boolean equals(Object JavaDoc o)
66   {
67     if (this == o)
68       return true;
69
70     if (o == null || getClass() != o.getClass())
71       return false;
72
73     EntityKey key = (EntityKey) o;
74
75     return _server == key._server && _primaryKey.equals(key._primaryKey);
76   }
77     
78   public String JavaDoc toString()
79   {
80     return "EntityKey[]";
81   }
82 }
83
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