javax.persistence.Inheritance Maven / Gradle / Ivy
// $Id: Inheritance.java 17752 2009-10-15 01:19:21Z [email protected] $
// EJB3 Specification Copyright 2004-2009 Sun Microsystems, Inc.
package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
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. */
InheritanceType strategy() default SINGLE_TABLE;
}