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/*
 * Copyright (c) 2008, 2019 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Petros Splinakis - 2.2
//     Linda DeMichiel - 2.1
//     Linda DeMichiel - 2.0

package javax.persistence;

import java.lang.annotation.Repeatable;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.*;


/**
 * Expresses a dependency on an {@link EntityManagerFactory} and its
 * associated persistence unit.
 *
 * @since 1.0
 */
@Repeatable(PersistenceUnits.class)
@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 "";

}




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