01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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;
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: return _numberOfLoadingColumns;
47: }
48:
49: public void setNumberOfLoadingColumns(int number) {
50: _numberOfLoadingColumns = number;
51: }
52:
53: public Entity loadEntity(int index) {
54: return getEntity();
55: }
56:
57: public Entity loadEntity(AmberConnection aConn, int index) {
58: return getEntity();
59: }
60:
61: public Entity createEntity(AmberConnection aConn, Object key)
62: throws java.sql.SQLException {
63: throw new UnsupportedOperationException();
64: }
65:
66: public AmberEntityHome getEntityHome() {
67: return null;
68: }
69:
70: abstract public void save(Entity item);
71:
72: abstract public void savePart(Entity item);
73:
74: abstract public void expire();
75:
76: abstract public Entity copy(AmberConnection aConn);
77:
78: abstract public Entity copyTo(Entity targetEntity,
79: AmberConnection aConn);
80:
81: public Entity load(AmberConnection aConn) {
82: return aConn.getEntity(this );
83: }
84:
85: abstract Class getInstanceClass();
86: }
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