| /* |
| * Copyright (c) 1998, 2020 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 v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // 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 |
| } |
| |