javax.persistence.PrimaryKeyJoinColumns Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2008, 2009 Sun Microsystems. 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.
*
* Contributors:
* Linda DeMichiel - Java Persistence 2.0 - Version 2.0 (October 1, 2009)
* Specification available from http://jcp.org/en/jsr/detail?id=317
*
******************************************************************************/
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();
}