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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or .
*/
package org.hibernate.event.internal;
import org.hibernate.HibernateException;
import org.hibernate.bytecode.enhance.spi.LazyPropertyInitializer;
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.CoreLogging;
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 = CoreLogging.messageLogger( EvictVisitor.class );
private Object owner;
EvictVisitor(EventSource session, Object owner) {
super(session);
this.owner = owner;
}
@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 PersistentCollection collection;
if ( type.hasHolder() ) {
collection = getSession().getPersistenceContext().removeCollectionHolder(value);
}
else if ( value instanceof PersistentCollection ) {
collection = (PersistentCollection) value;
}
else if ( value == LazyPropertyInitializer.UNFETCHED_PROPERTY ) {
collection = (PersistentCollection) type.resolve( value, getSession(), this.owner );
}
else {
return; //EARLY EXIT!
}
if ( collection != null && 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(),
collection,
ce.getLoadedKey(),
getSession() ) );
}
if (ce.getLoadedPersister() != null && ce.getLoadedPersister().getBatchSize() > 1) {
getSession().getPersistenceContext().getBatchFetchQueue().removeBatchLoadableCollection(ce);
}
if ( ce.getLoadedPersister() != null && ce.getLoadedKey() != null ) {
//TODO: is this 100% correct?
getSession().getPersistenceContext().getCollectionsByKey().remove(
new CollectionKey( ce.getLoadedPersister(), ce.getLoadedKey() )
);
}
}
@Override
boolean includeEntityProperty(Object[] values, int i) {
return true;
}
}