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Java > Open Source Codes > com > sleepycat > persist > model > DeleteAction


1 /*-
2  * See the file LICENSE for redistribution information.
3  *
4  * Copyright (c) 2002,2006 Oracle. All rights reserved.
5  *
6  * $Id: DeleteAction.java,v 1.6 2006/10/30 21:14:33 bostic Exp $
7  */
8
9 package com.sleepycat.persist.model;
10
11 import com.sleepycat.je.DatabaseException;
12
13 /**
14  * Specifies the action to take when a related entity is deleted having a
15  * primary key value that exists as a secondary key value for this entity.
16  * This can be specified using a {@link SecondaryKey#onRelatedEntityDelete}
17  * annotation.
18  *
19  * @author Mark Hayes
20  */
21 public enum DeleteAction {
22
23     /**
24      * The default action, {@code ABORT}, means that a {@link
25      * DatabaseException} is thrown in order to abort the current transaction.
26      */
27     ABORT,
28
29     /**
30      * If {@code CASCADE} is specified, then this entity will be deleted also,
31      * which could in turn trigger further deletions, causing a cascading
32      * effect.
33      */
34     CASCADE,
35
36     /**
37      * If {@code NULLIFY} is specified, then the secondary key in this entity
38      * is set to null and this entity is updated. For a secondary key field
39      * that has an array or collection type, the array or collection element
40      * will be removed by this action. The secondary key field must have a
41      * reference (not a primitive) type in order to specify this action.
42      */
43     NULLIFY;
44 }
45
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