javax.persistence.PrimaryKeyJoinColumns Maven / Gradle / Ivy
// $Id: PrimaryKeyJoinColumns.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.METHOD;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* Groups {@link PrimaryKeyJoinColumn} annotations.
* It is used to map composite foreign keys.
*
*
* Example: ValuedCustomer subclass
*
* @Entity
* @Table(name="VCUST")
* @DiscriminatorValue("VCUST")
* @PrimaryKeyJoinColumns({
* @PrimaryKeyJoinColumn(name="CUST_ID",
* referencedColumnName="ID"),
* @PrimaryKeyJoinColumn(name="CUST_TYPE",
* referencedColumnName="TYPE")
* })
* public class ValuedCustomer extends Customer { ... }
*
*
* @since Java Persistence 1.0
*/
@Target({ TYPE, METHOD, FIELD })
@Retention(RUNTIME)
public @interface PrimaryKeyJoinColumns {
/**
* One or more PrimaryKeyJoinColumn annotations.
*/
PrimaryKeyJoinColumn[] value();
}