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Java > Open Source Codes > org > objectweb > jalisto > se > impl > factory > InternalReadOnlyFactory


1 /*
2  * Jalisto - JAva LIght STOrage
3  * Copyright (C) 2000-2005 Xcalia http://www.xcalia.com
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU Lesser General Public
7  * License as published by the Free Software Foundation; either
8  * version 2.1 of the License, or (at your option) any later version.
9  *
10  * This library is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13  * Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public
16  * License along with this library; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
18  *
19  * Xcalia
20  * 71, rue Desnouettes
21  * 75014 Paris - France
22  * http://www.xcalia.com
23  */
24 package org.objectweb.jalisto.se.impl.factory;
25
26 import org.objectweb.jalisto.se.api.JalistoProperties;
27 import org.objectweb.jalisto.se.api.Session;
28 import org.objectweb.jalisto.se.api.internal.InternalFactory;
29 import org.objectweb.jalisto.se.api.internal.OidTable;
30 import org.objectweb.jalisto.se.api.internal.InternalPhysicalFileAccess;
31 import org.objectweb.jalisto.se.exception.JalistoException;
32 import org.objectweb.jalisto.se.impl.readonly.OidTableReadOnlyImpl;
33 import org.objectweb.jalisto.se.impl.readonly.InternalPhysicalFileAccessReadOnlyImpl;
34 import org.objectweb.jalisto.se.impl.readonly.SessionReadOnlyImpl;
35
36 public class InternalReadOnlyFactory extends InternalFactoryImpl {
37
38     private static InternalFactory instance;
39
40     public static InternalFactory getInstance() {
41         if (instance == null) {
42             instance = new InternalReadOnlyFactory();
43             instance.init();
44         }
45         return instance;
46     }
47
48     public void setSelfInstance() {
49         if (InternalReadOnlyFactory.instance == null) {
50             InternalReadOnlyFactory.instance = this;
51         }
52     }
53
54     public synchronized Session getSession(JalistoProperties properties) {
55         if (!properties.isReadOnlyImplementation()) {
56             throw new JalistoException("try to get a none read only session with Jalisto's read only jar version");
57         }
58         return new SessionReadOnlyImpl(properties);
59     }
60
61     public synchronized OidTable getOidTable(JalistoProperties properties) {
62         String JavaDoc path = properties.getDbFileFullName();
63         if (!oidTables.containsKey(path)) {
64             InternalPhysicalFileAccess physicalAccess = getInternalPhysicalAccess(properties);
65             oidTables.put(path, OidTableReadOnlyImpl.getAnOidTable(physicalAccess, properties));
66         }
67         return (OidTable) oidTables.get(path);
68     }
69
70     public synchronized InternalPhysicalFileAccess getInternalPhysicalAccess(JalistoProperties properties) {
71         String JavaDoc path = properties.getDbFileFullName();
72         if (!physicals.containsKey(path)) {
73             physicals.put(path, new InternalPhysicalFileAccessReadOnlyImpl(properties));
74         }
75         return (InternalPhysicalFileAccess) physicals.get(path);
76     }
77
78 }
79
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