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Java > Open Source Codes > net > sf > jasperreports > engine > JRVirtualizationHelper


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;
29
30 /**
31  * Virtualization helper class.
32  *
33  * @author Lucian Chirita (lucianc@users.sourceforge.net)
34  * @version $Id: JRVirtualizationHelper.java 1229 2006-04-19 13:27:35 +0300 (Wed, 19 Apr 2006) teodord $
35  */
36 public class JRVirtualizationHelper
37 {
38     private static final ThreadLocal JavaDoc threadVirtualizer = new ThreadLocal JavaDoc();
39
40     
41     /**
42      * Sets a virtualizer to be used for the current thread.
43      * <p>
44      * The current thread's virtualizer is used when a report obtained by virtualization
45      * is deserialized.
46      *
47      * @param virtualizer
48      */
49     public static void setThreadVirtualizer(JRVirtualizer virtualizer)
50     {
51         threadVirtualizer.set(virtualizer);
52     }
53
54     
55     /**
56      * Clears the virtualizer associated to the current thread.
57      */
58     public static void clearThreadVirtualizer()
59     {
60         threadVirtualizer.set(null);
61     }
62
63     
64     /**
65      * Returns the virtualizer associated to the current thread.
66      * <p>
67      * This method is used by {@link net.sf.jasperreports.engine.base.JRVirtualPrintPage JRVirtualPrintPage}
68      * on deserialization.
69      *
70      * @return the virtualizer associated to the current thread
71      */
72     public static JRVirtualizer getThreadVirtualizer()
73     {
74         return (JRVirtualizer) threadVirtualizer.get();
75     }
76 }
77
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