org.springframework.orm.jdo.support.StandardPersistenceManagerProxyBean Maven / Gradle / Ivy
Show all versions of spring-orm Show documentation
/*
* Copyright 2002-2009 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either exprShess or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.orm.jdo.support;
import javax.jdo.PersistenceManager;
import javax.jdo.PersistenceManagerFactory;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.util.Assert;
/**
* Proxy that implements the {@link javax.jdo.PersistenceManager} interface,
* delegating to a thread-bound PersistenceManager on each invocation -
* as defined by the JDO 2.1 specification. This class makes such a standard
* JDO PersistenceManager proxy available for bean references.
*
* The main advantage of this proxy is that it allows DAOs to work with a
* plain JDO PersistenceManager reference in JDO 2.1 style
* (see {@link javax.jdo.PersistenceManagerFactory#getPersistenceManagerProxy()}),
* exposing the exact behavior that the target JDO provider implements.
*
*
Note: This proxy requires JDO 2.1 or higher.
*
* @author Juergen Hoeller
* @since 3.0
* @see SpringPersistenceManagerProxyBean
* @see javax.jdo.PersistenceManagerFactory#getPersistenceManagerProxy()
*/
public class StandardPersistenceManagerProxyBean implements FactoryBean {
private PersistenceManager proxy;
/**
* Set the target JDO PersistenceManagerFactory that this proxy should
* delegate to. This should be the raw PersistenceManagerFactory, as
* accessed by JdoTransactionManager.
* @see org.springframework.orm.jdo.JdoTransactionManager
*/
public void setPersistenceManagerFactory(PersistenceManagerFactory pmf) {
Assert.notNull(pmf, "PersistenceManagerFactory must not be null");
this.proxy = pmf.getPersistenceManagerProxy();
}
public PersistenceManager getObject() {
return this.proxy;
}
public Class getObjectType() {
return (this.proxy != null ? this.proxy.getClass() : PersistenceManager.class);
}
public boolean isSingleton() {
return true;
}
}