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Hibernate definition of the Java Persistence 2.0 (JSR 317) API.

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

public @interface Id {
}