/******************************************************************************* | |
* Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved. | |
* This program and the accompanying materials are made available under the | |
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 | |
* which accompanies this distribution. | |
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html | |
* and the Eclipse Distribution License is available at | |
* http://www.eclipse.org/org/documents/edl-v10.php. | |
* | |
* Contributors: | |
* Oracle - initial API and implementation from Oracle TopLink | |
******************************************************************************/ | |
package org.eclipse.persistence.annotations; | |
/** | |
* An enum that is used within the OptimisticLocking annotation. | |
* | |
* @see org.eclipse.persistence.annotations.OptimisticLocking. | |
* @author Guy Pelletier | |
* @since Oracle TopLink 11.1.1.0.0 | |
*/ | |
public enum OptimisticLockingType { | |
/** | |
* Using this type of locking policy compares every field in the table | |
* in the WHERE clause when doing an update or a delete. If any field | |
* has been changed, an optimistic locking exception will be thrown. | |
*/ | |
ALL_COLUMNS, | |
/** | |
* Using this type of locking policy compares only the changed fields | |
* in the WHERE clause when doing an update. If any field has been | |
* changed, an optimistic locking exception will be thrown. A delete | |
* will only compare the primary key. | |
*/ | |
CHANGED_COLUMNS, | |
/** | |
* Using this type of locking compares selected fields in the WHERE | |
* clause when doing an update or a delete. If any field has been | |
* changed, an optimistic locking exception will be thrown. Note that | |
* the fields specified must be mapped and not be primary keys. | |
*/ | |
SELECTED_COLUMNS, | |
/** | |
* Using this type of locking policy compares a single version number | |
* in the where clause when doing an update. The version field must be | |
* mapped and not be the primary key. | |
*/ | |
VERSION_COLUMN | |
} | |