001/* 002 * Copyright 2002-2013 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 exprShess or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.orm.jdo.support; 018 019import javax.jdo.PersistenceManager; 020import javax.jdo.PersistenceManagerFactory; 021 022import org.springframework.beans.factory.FactoryBean; 023import org.springframework.util.Assert; 024 025/** 026 * Proxy that implements the {@link javax.jdo.PersistenceManager} interface, 027 * delegating to a thread-bound PersistenceManager on each invocation - 028 * as defined by the JDO 3.0 specification. This class makes such a standard 029 * JDO PersistenceManager proxy available for bean references. 030 * 031 * <p>The main advantage of this proxy is that it allows DAOs to work with a 032 * plain JDO PersistenceManager reference in JDO 3.0 style 033 * (see {@link javax.jdo.PersistenceManagerFactory#getPersistenceManagerProxy()}), 034 * exposing the exact behavior that the target JDO provider implements. 035 * 036 * @author Juergen Hoeller 037 * @since 3.0 038 * @see SpringPersistenceManagerProxyBean 039 * @see javax.jdo.PersistenceManagerFactory#getPersistenceManagerProxy() 040 */ 041public class StandardPersistenceManagerProxyBean implements FactoryBean<PersistenceManager> { 042 043 private PersistenceManager proxy; 044 045 046 /** 047 * Set the target JDO PersistenceManagerFactory that this proxy should 048 * delegate to. This should be the raw PersistenceManagerFactory, as 049 * accessed by JdoTransactionManager. 050 * @see org.springframework.orm.jdo.JdoTransactionManager 051 */ 052 public void setPersistenceManagerFactory(PersistenceManagerFactory pmf) { 053 Assert.notNull(pmf, "PersistenceManagerFactory must not be null"); 054 this.proxy = pmf.getPersistenceManagerProxy(); 055 } 056 057 058 @Override 059 public PersistenceManager getObject() { 060 return this.proxy; 061 } 062 063 @Override 064 public Class<? extends PersistenceManager> getObjectType() { 065 return (this.proxy != null ? this.proxy.getClass() : PersistenceManager.class); 066 } 067 068 @Override 069 public boolean isSingleton() { 070 return true; 071 } 072 073}