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

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// $Id: PersistenceUnit.java 17752 2009-10-15 01:19:21Z [email protected] $
// EJB3 Specification Copyright 2004-2009 Sun Microsystems, Inc.
package javax.persistence;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.ElementType.TYPE;
import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.RUNTIME;
import java.lang.annotation.Target;

/**
 * Expresses a dependency on an {@link EntityManagerFactory} and its
 * associated persistence unit.
 *
 * @since Java Persistence 1.0
 */
@Target({ TYPE, METHOD, FIELD })
@Retention(RUNTIME)
public @interface PersistenceUnit {
	/**
	 * (Optional) The name by which the entity manager factory is to be accessed
	 * in the environment referencing context;  not needed when
	 * dependency injection is used.
	 */
	String name() default "";

	/**
	 * (Optional) The name of the persistence unit as defined in the
	 * persistence.xml file. If specified, the
	 * persistence unit for the entity manager factory that is
	 * accessible in JNDI must have the same name.
	 */
	String unitName() default "";
}