1 package org.apache.ojb.odmg;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 import org.apache.ojb.broker.util.factory.ConfigurableFactory;
19 import org.odmg.Implementation;
20
21
22 /**
23 * Facade to the persistence ObjectServer system.
24 * Implements the factory interface for a particular ODMG implementation.
25 *
26 * @author <a href="mailto:armin@codeAuLait.de">Armin Waibel</a>
27 * @version $Id: OJB.java,v 1.1 2007-08-24 22:17:37 ewestfal Exp $
28 */
29 public class OJB extends ConfigurableFactory
30 {
31 private static OJB instance;
32
33 static
34 {
35 instance = new OJB();
36 }
37
38 /**
39 * protected Constructor: use static factory method
40 * getInstance() to obtain an instance of {@link Implementation}
41 */
42 protected OJB()
43 {
44 }
45
46 /**
47 * Return new instance of the {@link org.odmg.Implementation} class.
48 * The used implementation class can be specified in OJB properties file.
49 */
50 public static ImplementationExt getInstance()
51 {
52 return (ImplementationExt) instance.createNewInstance();
53 }
54
55 protected String getConfigurationKey()
56 {
57 return "ImplementationClass";
58 }
59 }