/*
* 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: IdClass.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.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
/**
* Specifies a composite primary key class that is mapped to
* multiple fields or properties of the entity.
*
* <p> The names of the fields or properties in the primary key
* class and the primary key fields or properties of the entity
* must correspond and their types must be the same.
*
* <pre>
*
* Example:
*
* @IdClass(com.acme.EmployeePK.class)
* @Entity
* public class Employee {
* @Id String empName;
* @Id Date birthDay;
* ...
* }
* </pre>
*
* @since Java Persistence 1.0
*/
@Target({TYPE})
@Retention(RUNTIME)
public @interface IdClass {
/** Primary key class */
Class value();
}