01: /*
02: * ============================================================================
03: * GNU Lesser General Public License
04: * ============================================================================
05: *
06: * JasperReports - Free Java report-generating library.
07: * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
08: *
09: * 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;
31: import java.util.Map;
32:
33: /**
34: * Factory class used for fill-time working clones creation.
35: * <p>
36: * A instance of this class is used for each created clone.
37: *
38: * @author Lucian Chirita (lucianc@users.sourceforge.net)
39: * @version $Id: JRFillCloneFactory.java 1229 2006-04-19 10:27:35Z teodord $
40: */
41: public class JRFillCloneFactory {
42: private Map cloneMap;
43:
44: public JRFillCloneFactory() {
45: cloneMap = new HashMap();
46: }
47:
48: protected JRCloneable getCached(JRCloneable original) {
49: return (JRCloneable) cloneMap.get(original);
50: }
51:
52: public void put(JRCloneable original, JRCloneable clone) {
53: cloneMap.put(original, clone);
54: }
55:
56: public JRCloneable getClone(JRCloneable original) {
57: JRCloneable clone;
58:
59: if (original == null) {
60: clone = null;
61: } else {
62: clone = getCached(original);
63:
64: if (clone == null) {
65: clone = original.createClone(this);
66: }
67: }
68:
69: return clone;
70: }
71: }
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