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Java > Open Source Codes > org > springframework > orm > jpa > EntityManagerHolder


1 /*
2  * Copyright 2002-2006 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.orm.jpa;
18
19 import javax.persistence.EntityManager;
20
21 import org.springframework.transaction.support.ResourceHolderSupport;
22 import org.springframework.util.Assert;
23
24 /**
25  * Holder wrapping a JPA EntityManager.
26  * JpaTransactionManager binds instances of this class
27  * to the thread, for a given EntityManagerFactory.
28  *
29  * <p>Note: This is an SPI class, not intended to be used by applications.
30  *
31  * @author Juergen Hoeller
32  * @since 2.0
33  * @see JpaTransactionManager
34  * @see EntityManagerFactoryUtils
35  */
36 public class EntityManagerHolder extends ResourceHolderSupport {
37
38     private final EntityManager entityManager;
39
40     public EntityManagerHolder(EntityManager entityManager) {
41         Assert.notNull(entityManager, "EntityManager must not be <code>null</code>");
42         this.entityManager = entityManager;
43     }
44
45     public EntityManager getEntityManager() {
46         return entityManager;
47     }
48
49 }
50
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