1 /*
2 * Copyright 2006-2013 the original author or authors.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 package org.springframework.batch.item.database.orm;
18
19 import javax.persistence.EntityManager;
20 import javax.persistence.Query;
21
22 import org.springframework.beans.factory.InitializingBean;
23
24 /**
25 * <p>
26 * Abstract JPA Query Provider to serve as a base class for all JPA
27 * {@link Query} providers.
28 * </p>
29 *
30 * @author Anatoly Polinsky
31 * @author Dave Syer
32 *
33 * @since 2.1
34 */
35 public abstract class AbstractJpaQueryProvider implements JpaQueryProvider, InitializingBean {
36
37 private EntityManager entityManager;
38
39 /**
40 * <p>
41 * Public setter to override the entityManager that was created by this
42 * {@link HibernateQueryProvider}. This is currently needed to allow
43 * {@link HibernateQueryProvider} to participate in a user's managed transaction.
44 * </p>
45 *
46 * @param entityManager
47 */
48 @Override
49 public void setEntityManager(EntityManager entityManager) {
50 this.entityManager = entityManager;
51 }
52
53 /**
54 * <p>
55 * Getter for {@link EntityManager}
56 * </p>
57 *
58 * @return entityManager the injected {@link EntityManager}
59 */
60 protected EntityManager getEntityManager() {
61 return entityManager;
62 }
63 }