/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, 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.loader.plan.spi;
import org.hibernate.engine.internal.JoinHelper;
import org.hibernate.persister.entity.EntityPersister;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.type.AssociationType;
import org.hibernate.type.Type;
/**
* A delegate for an entity fetch owner to obtain details about
* an owned attribute fetch.
*
* @author Gail Badner
*/
public class EntityFetchOwnerDelegate implements FetchOwnerDelegate {
private final EntityPersister entityPersister;
/**
* Constructs an {@link EntityFetchOwnerDelegate}.
*
* @param entityPersister - the entity persister.
*/
public EntityFetchOwnerDelegate(EntityPersister entityPersister) {
this.entityPersister = entityPersister;
}
@Override
public boolean isNullable(Fetch fetch) {
return entityPersister.getPropertyNullability()[ determinePropertyIndex( fetch ) ];
}
@Override
public Type getType(Fetch fetch) {
return entityPersister.getPropertyTypes()[ determinePropertyIndex( fetch ) ];
}
@Override
public String[] getColumnNames(Fetch fetch) {
// TODO: cache this info
final OuterJoinLoadable outerJoinLoadable = (OuterJoinLoadable) entityPersister;
Type fetchType = getType( fetch );
if ( fetchType.isAssociationType() ) {
return JoinHelper.getLHSColumnNames(
(AssociationType) fetchType,
determinePropertyIndex( fetch ),
outerJoinLoadable,
outerJoinLoadable.getFactory()
);
}
else {
return outerJoinLoadable.getPropertyColumnNames( determinePropertyIndex( fetch ) );
}
}
private int determinePropertyIndex(Fetch fetch) {
// TODO: cache this info
return entityPersister.getEntityMetamodel().getPropertyIndex( fetch.getOwnerPropertyName() );
}
}