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//$Id: CascadeEntityJoinWalker.java 7652 2005-07-26 05:51:47Z oneovthafew $
package org.hibernate.loader.entity;
import org.hibernate.FetchMode;
import org.hibernate.LockMode;
import org.hibernate.MappingException;
import org.hibernate.engine.CascadeStyle;
import org.hibernate.engine.CascadingAction;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.loader.AbstractEntityJoinWalker;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.type.AssociationType;
import org.hibernate.util.CollectionHelper;
public class CascadeEntityJoinWalker extends AbstractEntityJoinWalker {
private final CascadingAction cascadeAction;
public CascadeEntityJoinWalker(OuterJoinLoadable persister, CascadingAction action, SessionFactoryImplementor factory)
throws MappingException {
super( persister, factory, CollectionHelper.EMPTY_MAP );
this.cascadeAction = action;
StringBuffer whereCondition = whereString( getAlias(), persister.getIdentifierColumnNames(), 1 )
//include the discriminator and class-level where, but not filters
.append( persister.filterFragment( getAlias(), CollectionHelper.EMPTY_MAP ) );
initAll( whereCondition.toString(), "", LockMode.READ );
}
protected boolean isJoinedFetchEnabled(AssociationType type, FetchMode config, CascadeStyle cascadeStyle) {
return ( type.isEntityType() || type.isCollectionType() ) &&
( cascadeStyle==null || cascadeStyle.doCascade(cascadeAction) );
}
protected boolean isTooManyCollections() {
return countCollectionPersisters(associations)>1;
}
public String getComment() {
return "load " + getPersister().getEntityName();
}
}