org.hibernate.loader.entity.CascadeEntityJoinWalker Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
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* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
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* You should have received a copy of the GNU Lesser General Public License
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package org.hibernate.loader.entity;
import java.util.Collections;
import org.hibernate.FetchMode;
import org.hibernate.LockOptions;
import org.hibernate.MappingException;
import org.hibernate.engine.spi.CascadeStyle;
import org.hibernate.engine.spi.CascadingAction;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.loader.AbstractEntityJoinWalker;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.type.AssociationType;
public class CascadeEntityJoinWalker extends AbstractEntityJoinWalker {
private final CascadingAction cascadeAction;
public CascadeEntityJoinWalker(OuterJoinLoadable persister, CascadingAction action, SessionFactoryImplementor factory)
throws MappingException {
super( persister, factory, LoadQueryInfluencers.NONE );
this.cascadeAction = action;
StringBuilder whereCondition = whereString( getAlias(), persister.getIdentifierColumnNames(), 1 )
//include the discriminator and class-level where, but not filters
.append( persister.filterFragment( getAlias(), Collections.EMPTY_MAP ) );
initAll( whereCondition.toString(), "", LockOptions.READ );
}
@Override
protected boolean isJoinedFetchEnabled(AssociationType type, FetchMode config, CascadeStyle cascadeStyle) {
return ( type.isEntityType() || type.isCollectionType() ) &&
( cascadeStyle==null || cascadeStyle.doCascade(cascadeAction) );
}
@Override
protected boolean isTooManyCollections() {
return countCollectionPersisters(associations)>0;
}
@Override
public String getComment() {
return "load " + getPersister().getEntityName();
}
}