org.hibernate.loader.plan.build.internal.FetchGraphLoadPlanBuildingStrategy Maven / Gradle / Ivy
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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.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.fetchgraph} mode.
*
* @author Strong Liu
*/
public class FetchGraphLoadPlanBuildingStrategy extends AbstractEntityGraphVisitationStrategy {
private final RootGraphImplementor rootEntityGraph;
public FetchGraphLoadPlanBuildingStrategy(
final SessionFactoryImplementor sessionFactory,
final LoadQueryInfluencers loadQueryInfluencers,
final LockMode lockMode) {
this( sessionFactory, loadQueryInfluencers.getEffectiveEntityGraph().getGraph(), loadQueryInfluencers, lockMode );
assert loadQueryInfluencers.getEffectiveEntityGraph().getSemantic() == GraphSemantic.FETCH;
}
public FetchGraphLoadPlanBuildingStrategy(
final SessionFactoryImplementor sessionFactory,
RootGraphImplementor graph,
final LoadQueryInfluencers loadQueryInfluencers,
final LockMode lockMode) {
super( sessionFactory, loadQueryInfluencers, lockMode );
this.rootEntityGraph = graph;
}
@Override
protected RootGraphImplementor getRootEntityGraph() {
return rootEntityGraph;
}
@Override
protected FetchStrategy resolveImplicitFetchStrategyFromEntityGraph(
final AssociationAttributeDefinition attributeDefinition) {
//under fetchgraph mode, according to the SPEC, all other attributes that no in entity graph are supposed to be lazily loaded
return DEFAULT_LAZY;
}
}