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


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 import net.sf.jasperreports.engine.JRRuntimeException;
34
35
36 /**
37  * @author Teodor Danciu (teodord@users.sourceforge.net)
38  * @version $Id: JRIncrementerFactoryCache.java 1229 2006-04-19 13:27:35 +0300 (Wed, 19 Apr 2006) teodord $
39  */
40 public class JRIncrementerFactoryCache
41 {
42
43
44     /**
45      *
46      */
47     private static Map JavaDoc factoriesMap = null;
48
49
50     /**
51      *
52      */
53     public static synchronized JRIncrementerFactory getInstance(Class JavaDoc factoryClass)
54     {
55         if (factoriesMap == null)
56         {
57             factoriesMap = new HashMap JavaDoc();
58         }
59         
60         JRIncrementerFactory incrementerFactory = (JRIncrementerFactory)factoriesMap.get(factoryClass.getName());
61
62         if (incrementerFactory == null)
63         {
64             try
65             {
66                 incrementerFactory = (JRIncrementerFactory)factoryClass.newInstance();
67             }
68             catch (InstantiationException JavaDoc e)
69             {
70                 throw new JRRuntimeException(e);
71             }
72             catch (IllegalAccessException JavaDoc e)
73             {
74                 throw new JRRuntimeException(e);
75             }
76
77             factoriesMap.put(factoryClass.getName(), incrementerFactory);
78         }
79         
80         return incrementerFactory;
81     }
82
83
84 }
85
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