javax.persistence.Inheritance Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2009, 2011 Oracle, Inc. 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.
*/
package javax.persistence;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import static javax.persistence.InheritanceType.SINGLE_TABLE;
/**
* Defines the inheritance strategy to be used for an entity class
* hierarchy. It is specified on the entity class that is the root of
* the entity class hierarchy. If the Inheritance annotation is not
* specified or if no inheritance type is specified for an entity
* class hierarchy, the SINGLE_TABLE mapping strategy is used.
*
*
*
* Example:
*
* @Entity
* @Inheritance(strategy=JOINED)
* public class Customer { ... }
*
* @Entity
* public class ValuedCustomer extends Customer { ... }
*
*
* @since Java Persistence 1.0
*/
@Target({TYPE})
@Retention(RUNTIME)
public @interface Inheritance {
/**
* The strategy to be used for the entity inheritance hierarchy.
*
* @return strategy
*/
InheritanceType strategy() default SINGLE_TABLE;
}