/*
* Copyright (c) 2009, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* 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 javax.persistence.Cache;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContextType;
import javax.persistence.PersistenceUnitUtil;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.metamodel.Metamodel;
import javax.persistence.spi.LoadState;
import javax.persistence.spi.PersistenceUnitTransactionType;
import java.io.Serializable;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;
import org.hibernate.Hibernate;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.ejb.criteria.CriteriaBuilderImpl;
import org.hibernate.ejb.metamodel.MetamodelImpl;
import org.hibernate.ejb.util.PersistenceUtilHelper;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.mapping.PersistentClass;
import org.hibernate.metadata.ClassMetadata;
import org.hibernate.service.ServiceRegistry;
/**
* Actual Hibernate implementation of {@link javax.persistence.EntityManagerFactory}.
*
* @author Gavin King
* @author Emmanuel Bernard
* @author Steve Ebersole
*/
public class EntityManagerFactoryImpl implements HibernateEntityManagerFactory {
private final SessionFactory sessionFactory;
private final PersistenceUnitTransactionType transactionType;
private final boolean discardOnClose;
private final Class sessionInterceptorClass;
private final CriteriaBuilderImpl criteriaBuilder;
private final Metamodel metamodel;
private final HibernatePersistenceUnitUtil util;
private final Map<String,Object> properties;
private final PersistenceUtilHelper.MetadataCache cache = new PersistenceUtilHelper.MetadataCache();
@SuppressWarnings( "unchecked" )
public EntityManagerFactoryImpl(
PersistenceUnitTransactionType transactionType,
boolean discardOnClose,
Class sessionInterceptorClass,
Configuration cfg,
ServiceRegistry serviceRegistry) {
this.sessionFactory = cfg.buildSessionFactory( serviceRegistry );
this.transactionType = transactionType;
this.discardOnClose = discardOnClose;
this.sessionInterceptorClass = sessionInterceptorClass;
final Iterator<PersistentClass> classes = cfg.getClassMappings();
//a safe guard till we are confident that metamodel is wll tested
if ( !"disabled".equalsIgnoreCase( cfg.getProperty( "hibernate.ejb.metamodel.generation" ) ) ) {
this.metamodel = MetamodelImpl.buildMetamodel( classes, ( SessionFactoryImplementor ) sessionFactory );
}
else {
this.metamodel = null;
}
this.criteriaBuilder = new CriteriaBuilderImpl( this );
this.util = new HibernatePersistenceUnitUtil( this );
HashMap<String,Object> props = new HashMap<String, Object>();
addAll( props, ( (SessionFactoryImplementor) sessionFactory ).getProperties() );
addAll( props, cfg.getProperties() );
this.properties = Collections.unmodifiableMap( props );
}
private static void addAll(HashMap<String, Object> propertyMap, Properties properties) {
for ( Map.Entry entry : properties.entrySet() ) {
if ( String.class.isInstance( entry.getKey() ) ) {
propertyMap.put( (String)entry.getKey(), entry.getValue() );
}
}
}
public EntityManager createEntityManager() {
return createEntityManager( null );
}
public EntityManager createEntityManager(Map map) {
//TODO support discardOnClose, persistencecontexttype?, interceptor,
return new EntityManagerImpl(
this, PersistenceContextType.EXTENDED, transactionType,
discardOnClose, sessionInterceptorClass, map
);
}
public CriteriaBuilder getCriteriaBuilder() {
return criteriaBuilder;
}
public Metamodel getMetamodel() {
return metamodel;
}
public void close() {
sessionFactory.close();
}
public Map<String, Object> getProperties() {
return properties;
}
public Cache getCache() {
// TODO : cache the cache reference?
if ( ! isOpen() ) {
throw new IllegalStateException("EntityManagerFactory is closed");
}
return new JPACache( sessionFactory );
}
public PersistenceUnitUtil getPersistenceUnitUtil() {
if ( ! isOpen() ) {
throw new IllegalStateException("EntityManagerFactory is closed");
}
return util;
}
public boolean isOpen() {
return ! sessionFactory.isClosed();
}
public SessionFactory getSessionFactory() {
return sessionFactory;
}
private static class JPACache implements Cache {
private SessionFactory sessionFactory;
private JPACache(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public boolean contains(Class entityClass, Object identifier) {
return sessionFactory.getCache().containsEntity( entityClass, ( Serializable ) identifier );
}
public void evict(Class entityClass, Object identifier) {
sessionFactory.getCache().evictEntity( entityClass, ( Serializable ) identifier );
}
public void evict(Class entityClass) {
sessionFactory.getCache().evictEntityRegion( entityClass );
}
public void evictAll() {
sessionFactory.getCache().evictEntityRegions();
// TODO : if we want to allow an optional clearing of all cache data, the additional calls would be:
// sessionFactory.getCache().evictCollectionRegions();
// sessionFactory.getCache().evictQueryRegions();
}
}
private static class HibernatePersistenceUnitUtil implements PersistenceUnitUtil, Serializable {
private final HibernateEntityManagerFactory emf;
private transient PersistenceUtilHelper.MetadataCache cache;
private HibernatePersistenceUnitUtil(EntityManagerFactoryImpl emf) {
this.emf = emf;
this.cache = emf.cache;
}
public boolean isLoaded(Object entity, String attributeName) {
LoadState state = PersistenceUtilHelper.isLoadedWithoutReference( entity, attributeName, cache );
if (state == LoadState.LOADED) {
return true;
}
else if (state == LoadState.NOT_LOADED ) {
return false;
}
else {
return PersistenceUtilHelper.isLoadedWithReference( entity, attributeName, cache ) != LoadState.NOT_LOADED;
}
}
public boolean isLoaded(Object entity) {
return PersistenceUtilHelper.isLoaded( entity ) != LoadState.NOT_LOADED;
}
public Object getIdentifier(Object entity) {
final Class entityClass = Hibernate.getClass( entity );
final ClassMetadata classMetadata = emf.getSessionFactory().getClassMetadata( entityClass );
if (classMetadata == null) {
throw new IllegalArgumentException( entityClass + " is not an entity" );
}
//TODO does that work for @IdClass?
return classMetadata.getIdentifier( entity );
}
}
}