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Java > Open Source Codes > javax > jdo > listener > StoreCallback


1 /*
2  * Copyright 2005 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 /*
18  * StoreCallback.java
19  *
20  */
21  
22 package javax.jdo.listener;
23
24 /**
25  * This interface is used to notify instances of store events.
26  * @version 2.0
27  * @since 2.0
28  */
29 public interface StoreCallback {
30     
31     /**
32      * Called before the values are stored from this instance to the
33      * data store.
34      *
35      * <P>Data store fields that might have been affected by modified
36      * non-persistent fields should be updated in this method.
37      *
38      * <P>This method is modified by the enhancer so that changes to
39      * persistent fields will be reflected in the data store.
40      * The context in which this call is made allows access to the
41      * <code>PersistenceManager</code> and other persistent JDO instances.
42      */
43     void jdoPreStore();
44 }
45
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