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Java > Open Source Codes > org > apache > ojb > broker > accesslayer > StatementsForClassFactory


1 package org.apache.ojb.broker.accesslayer;
2
3 /* Copyright 2003-2005 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.apache.ojb.broker.metadata.ClassDescriptor;
20 import org.apache.ojb.broker.metadata.JdbcConnectionDescriptor;
21
22 /**
23  * Factory for {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
24  * implementations. Developers may specify the specific implementation returned by
25  * {@link #getStatementsForClass} by implementing the
26  * {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
27  * interface and setting the <code>StatementsForClassClass</code> property in
28  * <code>OJB.properties</code>.
29  * <br/>
30  * @see org.apache.ojb.broker.accesslayer.StatementManager
31  * @see org.apache.ojb.broker.accesslayer.StatementsForClassImpl
32  * @author <a HREF="mailto:rburt3@mchsi.com">Randall Burt</a>
33  * @version $Id: StatementsForClassFactory.java,v 1.5.2.1 2005/12/21 22:22:58 tomdz Exp $
34  */
35
36 public class StatementsForClassFactory extends ConfigurableFactory
37 {
38     private static StatementsForClassFactory singleton;
39
40
41     /**
42      * Get the singleton instance of this class
43      * @return the singleton instance of StatementsForClassFactory
44      */
45     public static synchronized StatementsForClassFactory getInstance()
46     {
47         if (singleton == null)
48         {
49             singleton = new StatementsForClassFactory();
50         }
51         return singleton;
52     }
53
54     /*
55      * @see org.apache.ojb.broker.util.factory.ConfigurableFactory#getConfigurationKey()
56      */
57     protected String JavaDoc getConfigurationKey()
58     {
59         return "StatementsForClassClass";
60     }
61
62
63     /**
64      * Get an instance of {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
65      * @param cds our connection descriptor
66      * @param cld the class descriptor of the persistant object
67      * @return an instance of {@link org.apache.ojb.broker.accesslayer.StatementsForClassIF}
68      */
69     public StatementsForClassIF getStatementsForClass(JdbcConnectionDescriptor cds, ClassDescriptor cld)
70     {
71         return (StatementsForClassIF) this.createNewInstance(new Class JavaDoc[]{JdbcConnectionDescriptor.class, ClassDescriptor.class},
72                                                              new Object JavaDoc[]{cds, cld});
73     }
74 }
75
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