/*
* 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.build.internal;
import org.hibernate.LockMode;
import org.hibernate.engine.FetchStrategy;
import org.hibernate.engine.FetchStyle;
import org.hibernate.engine.FetchTiming;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.graph.spi.GraphNodeImplementor;
import org.hibernate.persister.walking.spi.AssociationAttributeDefinition;
/**
* Loadplan building strategy for {@link javax.persistence.EntityGraph} is applied in {@code javax.persistence.loadgraph} mode.
*
* @author Strong Liu <stliu@hibernate.org>
*/
public class LoadGraphLoadPlanBuildingStrategy extends AbstractEntityGraphVisitationStrategy {
private final GraphNodeImplementor rootEntityGraph;
public LoadGraphLoadPlanBuildingStrategy(
final SessionFactoryImplementor sessionFactory, final LoadQueryInfluencers loadQueryInfluencers,final LockMode lockMode) {
super( sessionFactory, loadQueryInfluencers , lockMode);
this.rootEntityGraph = (GraphNodeImplementor) loadQueryInfluencers.getLoadGraph();
}
@Override
protected GraphNodeImplementor getRootEntityGraph() {
return rootEntityGraph;
}
@Override
protected FetchStrategy resolveImplicitFetchStrategyFromEntityGraph(
final AssociationAttributeDefinition attributeDefinition) {
FetchStrategy fetchStrategy = attributeDefinition.determineFetchPlan(
loadQueryInfluencers,
currentPropertyPath
);
if ( fetchStrategy.getTiming() == FetchTiming.IMMEDIATE && fetchStrategy.getStyle() == FetchStyle.JOIN ) {
// see if we need to alter the join fetch to another form for any reason
fetchStrategy = adjustJoinFetchIfNeeded( attributeDefinition, fetchStrategy );
}
return fetchStrategy;
}
}