SpringInMemoryPersistenceManagerFactory.java

/**
 * JHOVE2 - Next-generation architecture for format-aware characterization
 *
 * Copyright (c) 2009 by The Regents of the University of California,
 * Ithaka Harbors, Inc., and The Board of Trustees of the Leland Stanford
 * Junior University.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * o Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * o Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * o Neither the name of the University of California/California Digital
 *   Library, Ithaka Harbors/Portico, or Stanford University, nor the names of
 *   its contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package org.jhove2.config.spring;

import org.jhove2.core.JHOVE2Exception;
import org.jhove2.persist.PersistenceManager;
import org.jhove2.persist.PersistenceManagerFactory;
import org.jhove2.persist.inmemory.InMemoryPersistenceManager;

/**
 * @author smorrissey
 *
 */
public class SpringInMemoryPersistenceManagerFactory implements
		PersistenceManagerFactory {
	
	private static final String PM_CLASSNAME =  
		"org.jhove2.persist.inmemory.InMemoryPersistenceManager";
	private static final String PM_BEANNAME = "InMemoryPersistenceManager";
	
	private static InMemoryPersistenceManager inMemoryPersistenceManager = null;
	
	/* (non-Javadoc)
	 * @see org.jhove2.persist.PersistenceManagerFactory#getInstance()
	 */
	@SuppressWarnings("unchecked")
	@Override
	public PersistenceManager getInstance() throws JHOVE2Exception {
		if (inMemoryPersistenceManager==null){
			Class<InMemoryPersistenceManager> pClass = null;
			try {
				pClass = 
					(Class<InMemoryPersistenceManager>) Class.forName(PM_CLASSNAME);
			} catch (ClassNotFoundException e) {
				throw new JHOVE2Exception ("Unable to create Class object for " 
						+ PM_CLASSNAME, e);
			}
			inMemoryPersistenceManager = 
				SpringPersistenceManagerFactoryUtil.getInstance(pClass, PM_BEANNAME);
		}
		return inMemoryPersistenceManager;
	}

}