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Java > Open Source Codes > com > caucho > amber > entity > EntityItem


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  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.amber.entity;
31
32 import com.caucho.amber.manager.AmberConnection;
33
34 import java.util.Map JavaDoc;
35
36 /**
37  * An entity item handles the living entities.
38  */
39 abstract public class EntityItem {
40
41   private int _numberOfLoadingColumns;
42
43   abstract public Entity getEntity();
44
45   public int getNumberOfLoadingColumns()
46   {
47     return _numberOfLoadingColumns;
48   }
49
50   public void setNumberOfLoadingColumns(int number)
51   {
52     _numberOfLoadingColumns = number;
53   }
54
55   public Entity loadEntity(int index)
56   {
57     return getEntity();
58   }
59
60   public Entity loadEntity(int index,
61                            Map JavaDoc preloadedProperties)
62   {
63     return getEntity();
64   }
65
66   abstract public void save(Entity item);
67
68   abstract public void savePart(Entity item);
69
70   abstract public void expire();
71
72   abstract public Entity copy(AmberConnection aConn);
73
74   public Entity load(AmberConnection aConn)
75   {
76     return aConn.getEntity(this);
77   }
78
79   abstract Class JavaDoc getInstanceClass();
80 }
81
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