001/* 002 * Copyright 2002-2012 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.orm.jpa; 018 019import javax.persistence.EntityManager; 020 021/** 022 * Subinterface of {@link javax.persistence.EntityManager} to be implemented by 023 * EntityManager proxies. Allows access to the underlying target EntityManager. 024 * 025 * <p>This interface is mainly intended for framework usage. Application code 026 * should prefer the use of the {@link javax.persistence.EntityManager#getDelegate()} 027 * method to access native functionality of the underlying resource. 028 * 029 * @author Juergen Hoeller 030 * @since 2.5 031 */ 032public interface EntityManagerProxy extends EntityManager { 033 034 /** 035 * Return the underlying EntityManager that this proxy will delegate to. 036 * <p>In case of an extended EntityManager, this will be the associated 037 * raw EntityManager. 038 * <p>In case of a shared ("transactional") EntityManager, this will be 039 * the raw EntityManager that is currently associated with the transaction. 040 * Outside of a transaction, an IllegalStateException will be thrown. 041 * @return the underlying raw EntityManager (never {@code null}) 042 * @throws IllegalStateException if no underlying EntityManager is available 043 */ 044 EntityManager getTargetEntityManager() throws IllegalStateException; 045 046}