org.apache.causeway.persistence.jdo.spring.support.StandardPersistenceManagerProxyBean Maven / Gradle / Ivy
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.causeway.persistence.jdo.spring.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 3.0 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 3.0 style
* (see {@link javax.jdo.PersistenceManagerFactory#getPersistenceManagerProxy()}),
* exposing the exact behavior that the target JDO provider implements.
*
* @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.apache.causeway.persistence.jdo.spring.integration.JdoTransactionManager
*/
public void setPersistenceManagerFactory(PersistenceManagerFactory pmf) {
Assert.notNull(pmf, "PersistenceManagerFactory must not be null");
this.proxy = pmf.getPersistenceManagerProxy();
}
@Override
public PersistenceManager getObject() {
return this.proxy;
}
@Override
public Class getObjectType() {
return (this.proxy != null ? this.proxy.getClass() : PersistenceManager.class);
}
@Override
public boolean isSingleton() {
return true;
}
}