001/* 002 * Copyright 2006-2008 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.batch.item.ItemReader; 023 024/** 025 * <p>Interface defining the functionality to be provided for generating queries 026 * for use with JPA {@link ItemReader}s or other custom built artifacts.</p> 027 * 028 * @author Anatoly Polinsky 029 * @author Dave Syer 030 * @since 2.1 031 * 032 */ 033public interface JpaQueryProvider { 034 035 /** 036 * <p>Create the query object.</p> 037 * 038 * @return created query 039 */ 040 public Query createQuery(); 041 042 /** 043 * Provide an {@link EntityManager} for the query to be built. 044 * 045 * @param entityManager to be used by the {@link JpaQueryProvider}. 046 */ 047 void setEntityManager(EntityManager entityManager); 048 049}