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;
29:
30: /**
31: * Virtualization helper class.
32: *
33: * @author Lucian Chirita (lucianc@users.sourceforge.net)
34: * @version $Id: JRVirtualizationHelper.java 1229 2006-04-19 10:27:35Z teodord $
35: */
36: public class JRVirtualizationHelper {
37: private static final ThreadLocal threadVirtualizer = new ThreadLocal();
38:
39: /**
40: * Sets a virtualizer to be used for the current thread.
41: * <p>
42: * The current thread's virtualizer is used when a report obtained by virtualization
43: * is deserialized.
44: *
45: * @param virtualizer
46: */
47: public static void setThreadVirtualizer(JRVirtualizer virtualizer) {
48: threadVirtualizer.set(virtualizer);
49: }
50:
51: /**
52: * Clears the virtualizer associated to the current thread.
53: */
54: public static void clearThreadVirtualizer() {
55: threadVirtualizer.set(null);
56: }
57:
58: /**
59: * Returns the virtualizer associated to the current thread.
60: * <p>
61: * This method is used by {@link net.sf.jasperreports.engine.base.JRVirtualPrintPage JRVirtualPrintPage}
62: * on deserialization.
63: *
64: * @return the virtualizer associated to the current thread
65: */
66: public static JRVirtualizer getThreadVirtualizer() {
67: return (JRVirtualizer) threadVirtualizer.get();
68: }
69: }
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