001/* 002 * Copyright 2006-2013 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.batch.item.database.orm; 018 019import javax.persistence.EntityManager; 020import javax.persistence.Query; 021 022import org.springframework.beans.factory.InitializingBean; 023 024/** 025 * <p> 026 * Abstract JPA Query Provider to serve as a base class for all JPA 027 * {@link Query} providers. 028 * </p> 029 * 030 * @author Anatoly Polinsky 031 * @author Dave Syer 032 * 033 * @since 2.1 034 */ 035public abstract class AbstractJpaQueryProvider implements JpaQueryProvider, InitializingBean { 036 037 private EntityManager entityManager; 038 039 /** 040 * <p> 041 * Public setter to override the entityManager that was created by this 042 * {@link HibernateQueryProvider}. This is currently needed to allow 043 * {@link HibernateQueryProvider} to participate in a user's managed transaction. 044 * </p> 045 * 046 * @param entityManager EntityManager to use 047 */ 048 @Override 049 public void setEntityManager(EntityManager entityManager) { 050 this.entityManager = entityManager; 051 } 052 053 /** 054 * <p> 055 * Getter for {@link EntityManager} 056 * </p> 057 * 058 * @return entityManager the injected {@link EntityManager} 059 */ 060 protected EntityManager getEntityManager() { 061 return entityManager; 062 } 063}