/*
* 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
*/
// $Id: JoinColumns.java 20957 2011-06-13 09:58:51Z stliu $
package javax.persistence;
import java.lang.annotation.Target;
import java.lang.annotation.Retention;
import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* Defines mapping for composite foreign keys. This annotation
* groups <code>JoinColumn</code> annotations for the same relationship.
*
* <p> When the <code>JoinColumns</code> annotation is used,
* both the <code>name</code> and the <code>referencedColumnName</code> elements
* must be specified in each such <code>JoinColumn</code> annotation.
*
* <pre>
*
* Example:
* @ManyToOne
* @JoinColumns({
* @JoinColumn(name="ADDR_ID", referencedColumnName="ID"),
* @JoinColumn(name="ADDR_ZIP", referencedColumnName="ZIP")
* })
* public Address getAddress() { return address; }
* </pre>
*
* @see JoinColumn
*
* @since Java Persistence 1.0
*/
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface JoinColumns {
/**
* The join columns that map the relationship.
*/
JoinColumn[] value();
}