/*
* 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: Id.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;
/**
* Specifies the primary key of an entity.
* The field or property to which the <code>Id</code> annotation is applied
* should be one of the following types: any Java primitive type;
* any primitive wrapper type;
* <code>String</code>;
* <code>java.util.Date</code>;
* <code>java.sql.Date</code>;
* <code>java.math.BigDecimal</code>;
* <code>java.math.BigInteger</code>.
*
* <p>The mapped column for the primary key of the entity is assumed
* to be the primary key of the primary table. If no <code>Column</code> annotation
* is specified, the primary key column name is assumed to be the name
* of the primary key property or field.
*
* <pre>
* Example:
*
* @Id
* public Long getId() { return id; }
* </pre>
*
* @see Column
* @see GeneratedValue
*
* @since Java Persistence 1.0
*/
@Target({METHOD, FIELD})
@Retention(RUNTIME)
public @interface Id {
}