jakarta.persistence.GenerationType Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2022 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:
// Linda DeMichiel - 2.1
// Linda DeMichiel - 2.0
package jakarta.persistence;
/**
* Defines the types of primary key generation strategies.
*
* @see GeneratedValue
*
* @since 1.0
*/
public enum GenerationType {
/**
* Indicates that the persistence provider must assign
* primary keys for the entity using an underlying
* database table to ensure uniqueness.
*/
TABLE,
/**
* Indicates that the persistence provider must assign
* primary keys for the entity using a database sequence.
*/
SEQUENCE,
/**
* Indicates that the persistence provider must assign
* primary keys for the entity using a database identity column.
*/
IDENTITY,
/**
* Indicates that the persistence provider must assign
* primary keys for the entity by generating an RFC 4122
* Universally Unique IDentifier.
*/
UUID,
/**
* Indicates that the persistence provider should pick an
* appropriate strategy for the particular database. The
* AUTO generation strategy may expect a database
* resource to exist, or it may attempt to create one. A vendor
* may provide documentation on how to create such resources
* in the event that it does not support schema generation
* or cannot create the schema resource at runtime.
*/
AUTO
}