/*
* 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.loader.entity;
import java.util.Map;
import org.hibernate.HibernateException;
import org.hibernate.LockMode;
import org.hibernate.MappingException;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.loader.JoinWalker;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.type.Type;
/**
* Loads an entity instance using outerjoin fetching to fetch associated entities.
* <br>
* The <tt>EntityPersister</tt> must implement <tt>Loadable</tt>. For other entities,
* create a customized subclass of <tt>Loader</tt>.
*
* @author Gavin King
*/
public class EntityLoader extends AbstractEntityLoader {
private final boolean batchLoader;
public EntityLoader(
OuterJoinLoadable persister,
LockMode lockMode,
SessionFactoryImplementor factory,
Map enabledFilters)
throws MappingException {
this(persister, 1, lockMode, factory, enabledFilters);
}
public EntityLoader(
OuterJoinLoadable persister,
int batchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
Map enabledFilters)
throws MappingException {
this(
persister,
persister.getIdentifierColumnNames(),
persister.getIdentifierType(),
batchSize,
lockMode,
factory,
enabledFilters
);
}
public EntityLoader(
OuterJoinLoadable persister,
String[] uniqueKey,
Type uniqueKeyType,
int batchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
Map enabledFilters)
throws MappingException {
super(persister, uniqueKeyType, factory, enabledFilters);
JoinWalker walker = new EntityJoinWalker(
persister,
uniqueKey,
batchSize,
lockMode,
factory,
enabledFilters
);
initFromWalker( walker );
postInstantiate();
batchLoader = batchSize > 1;
log.debug( "Static select for entity " + entityName + ": " + getSQLString() );
}
public Object loadByUniqueKey(SessionImplementor session, Object key)
throws HibernateException {
return load(session, key, null, null);
}
protected boolean isSingleRowLoader() {
return !batchLoader;
}
}