/*
 * Copyright 2002-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.orm.jpa;

import javax.persistence.EntityManager;

Subinterface of EntityManager to be implemented by EntityManager proxies. Allows access to the underlying target EntityManager. 
This interface is mainly intended for framework usage. Application code should prefer the use of the EntityManager.getDelegate() method to access native functionality of the underlying resource. 
Author:
Juergen Hoeller
Since:
2.5/**
 * Subinterface of {@link javax.persistence.EntityManager} to be implemented by
 * EntityManager proxies. Allows access to the underlying target EntityManager.
 *
 * <p>This interface is mainly intended for framework usage. Application code
 * should prefer the use of the {@link javax.persistence.EntityManager#getDelegate()}
 * method to access native functionality of the underlying resource.
 *
 * @author Juergen Hoeller
 * @since 2.5
 */
public interface EntityManagerProxy extends EntityManager {

	
Return the underlying EntityManager that this proxy will delegate to.
In case of an extended EntityManager, this will be the associated
raw EntityManager.
In case of a shared ("transactional") EntityManager, this will be
the raw EntityManager that is currently associated with the transaction.
Outside of a transaction, an IllegalStateException will be thrown.
Throws:
IllegalStateException – if no underlying EntityManager is available
Returns:
the underlying raw EntityManager (never null)/**
	 * Return the underlying EntityManager that this proxy will delegate to.
	 * <p>In case of an extended EntityManager, this will be the associated
	 * raw EntityManager.
	 * <p>In case of a shared ("transactional") EntityManager, this will be
	 * the raw EntityManager that is currently associated with the transaction.
	 * Outside of a transaction, an IllegalStateException will be thrown.
	 * @return the underlying raw EntityManager (never {@code null})
	 * @throws IllegalStateException if no underlying EntityManager is available
	 */
	EntityManager getTargetEntityManager() throws IllegalStateException;

}