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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  }