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Java > Open Source Codes > org > apache > ojb > odmg > OdmgConfiguration


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
19 /**
20  * This interface defines the configurable setting of the ODMG
21  * layer.
22  * @author <a HREF="mailto:thma@apache.org">Thomas Mahler<a>
23  * @version $Id: OdmgConfiguration.java,v 1.8.2.1 2005/12/21 22:29:21 tomdz Exp $
24  */
25
26 public interface OdmgConfiguration
27 {
28     /**
29      * If true acquiring a write-lock on a given object x implies write
30      * locks on all objects associated to x.
31      * If false implicit read-locks are acquired.
32      */
33     public boolean lockAssociationAsWrites();
34     
35     /**
36      * This class is used to hold results of OQL queries.
37      * By default a DListImpl is used.
38      */
39     public Class JavaDoc getOqlCollectionClass();
40     
41     /**
42      * defines if implicit lock acquisition is to be used.
43      * If set to true OJB implicitely locks objects to ODMG
44      * transactions after performing OQL queries.
45      * If implicit locking is used locking objects is recursive, that is
46      * associated objects are also locked.
47      * If ImplicitLocking is set to false, no locks are obtained in OQL
48      * queries and there is also no recursive locking.
49      */
50     public boolean useImplicitLocking();
51
52 }
53
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