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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.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.GraphSemantic;
import org.hibernate.graph.spi.RootGraphImplementor;
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
*/
public class LoadGraphLoadPlanBuildingStrategy extends AbstractEntityGraphVisitationStrategy {
private final RootGraphImplementor rootEntityGraph;
public LoadGraphLoadPlanBuildingStrategy(
final SessionFactoryImplementor sessionFactory,
final LoadQueryInfluencers loadQueryInfluencers,
final LockMode lockMode) {
this( sessionFactory, loadQueryInfluencers.getEffectiveEntityGraph().getGraph(), loadQueryInfluencers, lockMode);
assert loadQueryInfluencers.getEffectiveEntityGraph().getSemantic() == GraphSemantic.LOAD;
}
public LoadGraphLoadPlanBuildingStrategy(
SessionFactoryImplementor factory,
RootGraphImplementor graph,
LoadQueryInfluencers queryInfluencers,
LockMode lockMode) {
super( factory, queryInfluencers, lockMode );
this.rootEntityGraph = graph;
}
@Override
protected RootGraphImplementor 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;
}
}