/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. 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 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.event.internal;
import org.hibernate.EntityMode;
import org.hibernate.HibernateException;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.spi.PersistenceContext;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.event.spi.EventSource;
import org.hibernate.internal.CoreLogging;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.type.CollectionType;
import org.hibernate.type.CompositeType;
import org.hibernate.type.Type;
/**
* Wrap collections in a Hibernate collection wrapper.
*
* @author Gavin King
*/
public class WrapVisitor extends ProxyVisitor {
private static final CoreMessageLogger LOG = CoreLogging.messageLogger( WrapVisitor.class );
boolean substitute;
boolean isSubstitutionRequired() {
return substitute;
}
WrapVisitor(EventSource session) {
super( session );
}
@Override
Object processCollection(Object collection, CollectionType collectionType)
throws HibernateException {
if ( collection != null && ( collection instanceof PersistentCollection ) ) {
final SessionImplementor session = getSession();
PersistentCollection coll = (PersistentCollection) collection;
if ( coll.setCurrentSession( session ) ) {
reattachCollection( coll, collectionType );
}
return null;
}
else {
return processArrayOrNewCollection( collection, collectionType );
}
}
final Object processArrayOrNewCollection(Object collection, CollectionType collectionType)
throws HibernateException {
final SessionImplementor session = getSession();
if ( collection == null ) {
//do nothing
return null;
}
else {
CollectionPersister persister = session.getFactory().getCollectionPersister( collectionType.getRole() );
final PersistenceContext persistenceContext = session.getPersistenceContext();
//TODO: move into collection type, so we can use polymorphism!
if ( collectionType.hasHolder() ) {
if ( collection == CollectionType.UNFETCHED_COLLECTION ) {
return null;
}
PersistentCollection ah = persistenceContext.getCollectionHolder( collection );
if ( ah == null ) {
ah = collectionType.wrap( session, collection );
persistenceContext.addNewCollection( persister, ah );
persistenceContext.addCollectionHolder( ah );
}
return null;
}
else {
PersistentCollection persistentCollection = collectionType.wrap( session, collection );
persistenceContext.addNewCollection( persister, persistentCollection );
if ( LOG.isTraceEnabled() ) {
LOG.tracev( "Wrapped collection in role: {0}", collectionType.getRole() );
}
return persistentCollection; //Force a substitution!
}
}
}
@Override
void processValue(int i, Object[] values, Type[] types) {
Object result = processValue( values[i], types[i] );
if ( result != null ) {
substitute = true;
values[i] = result;
}
}
@Override
Object processComponent(Object component, CompositeType componentType) throws HibernateException {
if ( component != null ) {
Object[] values = componentType.getPropertyValues( component, getSession() );
Type[] types = componentType.getSubtypes();
boolean substituteComponent = false;
for ( int i = 0; i < types.length; i++ ) {
Object result = processValue( values[i], types[i] );
if ( result != null ) {
values[i] = result;
substituteComponent = true;
}
}
if ( substituteComponent ) {
componentType.setPropertyValues( component, values, EntityMode.POJO );
}
}
return null;
}
@Override
void process(Object object, EntityPersister persister) throws HibernateException {
final Object[] values = persister.getPropertyValues( object );
final Type[] types = persister.getPropertyTypes();
processEntityPropertyValues( values, types );
if ( isSubstitutionRequired() ) {
persister.setPropertyValues( object, values );
}
}
}