Hibernate example source code file (HibernatePersistence.java)

This example Hibernate source code file (HibernatePersistence.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Hibernate tags/keywords

availablesettings, deprecated, ejb3configuration, ejb3configuration, entitymanagerfactory, entitymanagerfactory, hibernatepersistence, loadstate, loadstate, map, persistenceprovider, providerutil, providerutil, string, util

The Hibernate HibernatePersistence.java source code

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2009 by Red Hat Inc and/or its affiliates or by
 * third-party contributors as indicated by either @author tags or express
 * copyright attribution statements applied by the authors.  All
 * third-party contributions are distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA\
 */
package org.hibernate.ejb;

import java.util.Map;
import javax.persistence.EntityManagerFactory;
import javax.persistence.spi.LoadState;
import javax.persistence.spi.PersistenceProvider;
import javax.persistence.spi.PersistenceUnitInfo;
import javax.persistence.spi.ProviderUtil;
import org.hibernate.ejb.util.PersistenceUtilHelper;

/**
 * Hibernate EJB3 persistence provider implementation
 *
 * @author Gavin King
 */
public class HibernatePersistence extends AvailableSettings implements PersistenceProvider {
	private final PersistenceUtilHelper.MetadataCache cache = new PersistenceUtilHelper.MetadataCache();

	/**
	 * Get an entity manager factory by its entity manager name, using the specified
	 * properties (they override any found in the peristence.xml file).
	 * <p/>
	 * This is the form used in JSE environments.
	 *
	 * @param persistenceUnitName entity manager name
	 * @param properties The explicit property values
	 *
	 * @return initialized EntityManagerFactory
	 */
	public EntityManagerFactory createEntityManagerFactory(String persistenceUnitName, Map properties) {
		Ejb3Configuration cfg = new Ejb3Configuration();
		Ejb3Configuration configured = cfg.configure( persistenceUnitName, properties );
		return configured != null ? configured.buildEntityManagerFactory() : null;
	}

	/**
	 * Create an entity manager factory from the given persistence unit info, using the specified
	 * properties (they override any on the PUI).
	 * <p/>
	 * This is the form used by the container in a JEE environment.
	 *
	 * @param info The persistence unit information
	 * @param properties The explicit property values
	 *
	 * @return initialized EntityManagerFactory
	 */
	public EntityManagerFactory createContainerEntityManagerFactory(PersistenceUnitInfo info, Map properties) {
		Ejb3Configuration cfg = new Ejb3Configuration();
		Ejb3Configuration configured = cfg.configure( info, properties );
		return configured != null ? configured.buildEntityManagerFactory() : null;
	}

	/**
	 * create a factory from a canonical version
	 * @deprecated
	 */
	@Deprecated
    public EntityManagerFactory createEntityManagerFactory(Map properties) {
		// This is used directly by JBoss so don't remove until further notice.  bill@jboss.org
		Ejb3Configuration cfg = new Ejb3Configuration();
		return cfg.createEntityManagerFactory( properties );
	}

	private final ProviderUtil providerUtil = new ProviderUtil() {
		public LoadState isLoadedWithoutReference(Object proxy, String property) {
			return PersistenceUtilHelper.isLoadedWithoutReference( proxy, property, cache );
		}

		public LoadState isLoadedWithReference(Object proxy, String property) {
			return PersistenceUtilHelper.isLoadedWithReference( proxy, property, cache );
		}

		public LoadState isLoaded(Object o) {
			return PersistenceUtilHelper.isLoaded(o);
		}
	};

	/**
	 * {@inheritDoc}
	 */
	public ProviderUtil getProviderUtil() {
		return providerUtil;
	}

}