01: /*
02: * Copyright 1990-2006 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
04: *
05: * This program is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU General Public License version
07: * 2 only, as published by the Free Software Foundation.
08: *
09: * This program is distributed in the hope that it will be useful, but
10: * WITHOUT ANY WARRANTY; without even the implied warranty of
11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12: * General Public License version 2 for more details (a copy is
13: * included at /legal/license.txt).
14: *
15: * You should have received a copy of the GNU General Public License
16: * version 2 along with this work; if not, write to the Free Software
17: * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
18: * 02110-1301 USA
19: *
20: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
21: * Clara, CA 95054 or visit www.sun.com if you need additional
22: * information or have any questions.
23: */
24:
25: package com.sun.jump.module.presentation;
26:
27: import com.sun.jump.module.JUMPModuleFactory;
28:
29: /**
30: * <code>JUMPPresentationModuleFactory</code> is a factory for
31: * <code>JUMPPresentationModule</code>
32: */
33: public abstract class JUMPPresentationModuleFactory extends
34: JUMPModuleFactory {
35:
36: private static JUMPPresentationModuleFactory INSTANCE = null;
37:
38: public static JUMPPresentationModuleFactory getInstance() {
39: return INSTANCE;
40: }
41:
42: /**
43: * Creates a new instance of JUMPPresentationModuleFactory
44: */
45: protected JUMPPresentationModuleFactory() {
46: synchronized (JUMPPresentationModuleFactory.class) {
47: if (INSTANCE == null) {
48: INSTANCE = this ;
49: }
50: }
51: }
52:
53: /**
54: * Returns a <code>JUMPPresentationModule</code>
55: *
56: * @param presentation A fully qualified presentation module class name.
57: * @return a newly created <code>JUMPPresentationModule</code>, or
58: * an already created <code>JUMPPresentationModule</code>
59: * corresponding to the class name if it's found.
60: * Null if class cannot be instanciated.
61: */
62: public abstract JUMPPresentationModule getModule(String presentation);
63:
64: }
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