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Java > Open Source Codes > net > sf > jasperreports > engine > fill > JRFillCloneFactory


1 /*
2  * ============================================================================
3  * GNU Lesser General Public License
4  * ============================================================================
5  *
6  * JasperReports - Free Java report-generating library.
7  * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
8  *
9  * This library is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * This library 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. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22  *
23  * JasperSoft Corporation
24  * 303 Second Street, Suite 450 North
25  * San Francisco, CA 94107
26  * http://www.jaspersoft.com
27  */
28 package net.sf.jasperreports.engine.fill;
29
30 import java.util.HashMap JavaDoc;
31 import java.util.Map JavaDoc;
32
33
34 /**
35  * Factory class used for fill-time working clones creation.
36  * <p>
37  * A instance of this class is used for each created clone.
38  *
39  * @author Lucian Chirita (lucianc@users.sourceforge.net)
40  * @version $Id: JRFillCloneFactory.java 1229 2006-04-19 13:27:35 +0300 (Wed, 19 Apr 2006) teodord $
41  */
42 public class JRFillCloneFactory
43 {
44     private Map JavaDoc cloneMap;
45     
46     public JRFillCloneFactory()
47     {
48         cloneMap = new HashMap JavaDoc();
49     }
50
51     protected JRCloneable getCached(JRCloneable original)
52     {
53         return (JRCloneable) cloneMap.get(original);
54     }
55
56     public void put(JRCloneable original, JRCloneable clone)
57     {
58         cloneMap.put(original, clone);
59     }
60
61     public JRCloneable getClone(JRCloneable original)
62     {
63         JRCloneable clone;
64         
65         if (original == null)
66         {
67             clone = null;
68         }
69         else
70         {
71             clone = getCached(original);
72             
73             if (clone == null)
74             {
75                 clone = original.createClone(this);
76             }
77         }
78
79         return clone;
80     }
81 }
82
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