01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * // Copyright (c) 1998, 2007, Oracle. All rights reserved.
05: *
06: *
07: * The contents of this file are subject to the terms of either the GNU
08: * General Public License Version 2 only ("GPL") or the Common Development
09: * and Distribution License("CDDL") (collectively, the "License"). You
10: * may not use this file except in compliance with the License. You can obtain
11: * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
12: * or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
13: * language governing permissions and limitations under the License.
14: *
15: * When distributing the software, include this License Header Notice in each
16: * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
17: * Sun designates this particular file as subject to the "Classpath" exception
18: * as provided by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the License
20: * Header, with the fields enclosed by brackets [] replaced by your own
21: * identifying information: "Portions Copyrighted [year]
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26: * If you wish your version of this file to be governed by only the CDDL or
27: * only the GPL Version 2, indicate your decision by adding "[Contributor]
28: * elects to include this software in this distribution under the [CDDL or GPL
29: * Version 2] license." If you don't indicate a single choice of license, a
30: * recipient has the option to distribute your version of this file under
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32: * its licensees as provided above. However, if you add GPL Version 2 code
33: * and therefore, elected the GPL Version 2 license, then the option applies
34: * only if the new code is made subject to such option by the copyright
35: * holder.
36: */
37: package oracle.toplink.essentials.internal.sequencing;
38:
39: import oracle.toplink.essentials.internal.sessions.AbstractSession;
40: import oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl;
41: import oracle.toplink.essentials.threetier.ClientSession;
42:
43: /**
44: * SequencingFactory is private to TopLink.
45: * It instantiates sequencing classes for sessions.
46: * It allows sequencing classes to be incupsulated in
47: * this package.
48: *
49: * @see ClientSessionSequencing
50: * @see RemoteConnectionSequencing
51: * @see SessionBrokerSequencing
52: * @see SequencingManager
53: *
54: */
55: public class SequencingFactory {
56:
57: /**
58: * INTERNAL:
59: * Takes a potential owner - a Session, returns Sequencing object.
60: * Note that before creating a Sequencing object there is a check performed
61: * to determine whether the object could be created.
62: */
63: public static Sequencing createSequencing(AbstractSession session) {
64: Sequencing sequencing = null;
65: if (session.isClientSession()) {
66: ClientSession cs = (ClientSession) session;
67: if (ClientSessionSequencing.sequencingServerExists(cs)) {
68: sequencing = new ClientSessionSequencing(cs);
69: }
70: }
71: return sequencing;
72: }
73:
74: /**
75: * INTERNAL:
76: * Takes a potential owner - a DatabaseSession, returns SequencingHome object.
77: * Only DatabaseSession and ServerSession should be passed (not SessionBroker).
78: */
79: public static SequencingHome createSequencingHome(
80: DatabaseSessionImpl ownerSession) {
81: SequencingHome home = null;
82: if (!ownerSession.isBroker()) {
83: home = new SequencingManager(ownerSession);
84: }
85: return home;
86: }
87: }
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