/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008-2011, 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.jboss.logging.Logger;
import org.hibernate.HibernateException;
import org.hibernate.collection.spi.PersistentCollection;
import org.hibernate.engine.spi.CollectionEntry;
import org.hibernate.engine.spi.CollectionKey;
import org.hibernate.event.spi.EventSource;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.pretty.MessageHelper;
import org.hibernate.type.CollectionType;
/**
* Evict any collections referenced by the object from the session cache.
* This will NOT pick up any collections that were dereferenced, so they
* will be deleted (suboptimal but not exactly incorrect).
*
* @author Gavin King
*/
public class EvictVisitor extends AbstractVisitor {
private static final CoreMessageLogger LOG = Logger.getMessageLogger( CoreMessageLogger.class, EvictVisitor.class.getName() );
EvictVisitor(EventSource session) {
super(session);
}
@Override
Object processCollection(Object collection, CollectionType type)
throws HibernateException {
if (collection!=null) evictCollection(collection, type);
return null;
}
public void evictCollection(Object value, CollectionType type) {
final Object pc;
if ( type.hasHolder() ) {
pc = getSession().getPersistenceContext().removeCollectionHolder(value);
}
else if ( value instanceof PersistentCollection ) {
pc = value;
}
else {
return; //EARLY EXIT!
}
PersistentCollection collection = (PersistentCollection) pc;
if ( collection.unsetSession( getSession() ) ) evictCollection(collection);
}
private void evictCollection(PersistentCollection collection) {
CollectionEntry ce = (CollectionEntry) getSession().getPersistenceContext().getCollectionEntries().remove(collection);
if ( LOG.isDebugEnabled() ) {
LOG.debugf( "Evicting collection: %s",
MessageHelper.collectionInfoString( ce.getLoadedPersister(),
ce.getLoadedKey(),
getSession().getFactory() ) );
}
if ( ce.getLoadedPersister() != null && ce.getLoadedKey() != null ) {
//TODO: is this 100% correct?
getSession().getPersistenceContext().getCollectionsByKey().remove(
new CollectionKey( ce.getLoadedPersister(), ce.getLoadedKey() )
);
}
}
}