/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, 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.event.def;
import java.io.Serializable;
import org.hibernate.HibernateException;
import org.hibernate.collection.PersistentCollection;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.event.EventSource;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.type.CollectionType;
/**
* When a transient entity is passed to lock(), we must inspect all its collections and
* 1. associate any uninitialized PersistentCollections with this session
* 2. associate any initialized PersistentCollections with this session, using the
* existing snapshot
* 3. throw an exception for each "new" collection
*
* @author Gavin King
*/
public class OnLockVisitor extends ReattachVisitor {
public OnLockVisitor(EventSource session, Serializable key, Object owner) {
super( session, key, owner );
}
Object processCollection(Object collection, CollectionType type) throws HibernateException {
SessionImplementor session = getSession();
CollectionPersister persister = session.getFactory().getCollectionPersister( type.getRole() );
if ( collection == null ) {
//do nothing
}
else if ( collection instanceof PersistentCollection ) {
PersistentCollection persistentCollection = ( PersistentCollection ) collection;
if ( persistentCollection.setCurrentSession( session ) ) {
if ( isOwnerUnchanged( persistentCollection, persister, extractCollectionKeyFromOwner( persister ) ) ) {
// a "detached" collection that originally belonged to the same entity
if ( persistentCollection.isDirty() ) {
throw new HibernateException( "reassociated object has dirty collection" );
}
reattachCollection( persistentCollection, type );
}
else {
// a "detached" collection that belonged to a different entity
throw new HibernateException( "reassociated object has dirty collection reference" );
}
}
else {
// a collection loaded in the current session
// can not possibly be the collection belonging
// to the entity passed to update()
throw new HibernateException( "reassociated object has dirty collection reference" );
}
}
else {
// brand new collection
//TODO: or an array!! we can't lock objects with arrays now??
throw new HibernateException( "reassociated object has dirty collection reference (or an array)" );
}
return null;
}
}