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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.entity;
import java.util.Collections;
import org.hibernate.FetchMode;
import org.hibernate.LockMode;
import org.hibernate.MappingException;
import org.hibernate.LockOptions;
import org.hibernate.engine.CascadeStyle;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.engine.LoadQueryInfluencers;
import org.hibernate.loader.AbstractEntityJoinWalker;
import org.hibernate.persister.entity.OuterJoinLoadable;
import org.hibernate.type.AssociationType;
/**
* A walker for loaders that fetch entities
*
* @see EntityLoader
* @author Gavin King
*/
public class EntityJoinWalker extends AbstractEntityJoinWalker {
private final LockOptions lockOptions = new LockOptions();
public EntityJoinWalker(
OuterJoinLoadable persister,
String[] uniqueKey,
int batchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
LoadQueryInfluencers loadQueryInfluencers) throws MappingException {
super( persister, factory, loadQueryInfluencers );
this.lockOptions.setLockMode(lockMode);
StringBuffer whereCondition = whereString( getAlias(), uniqueKey, batchSize )
//include the discriminator and class-level where, but not filters
.append( persister.filterFragment( getAlias(), Collections.EMPTY_MAP ) );
initAll( whereCondition.toString(), "", lockOptions);
}
public EntityJoinWalker(
OuterJoinLoadable persister,
String[] uniqueKey,
int batchSize,
LockOptions lockOptions,
SessionFactoryImplementor factory,
LoadQueryInfluencers loadQueryInfluencers) throws MappingException {
super( persister, factory, loadQueryInfluencers );
LockOptions.copy(lockOptions, this.lockOptions);
StringBuffer whereCondition = whereString( getAlias(), uniqueKey, batchSize )
//include the discriminator and class-level where, but not filters
.append( persister.filterFragment( getAlias(), Collections.EMPTY_MAP ) );
initAll( whereCondition.toString(), "", lockOptions);
}
protected int getJoinType(
OuterJoinLoadable persister,
String path,
int propertyNumber,
AssociationType associationType,
FetchMode metadataFetchMode,
CascadeStyle metadataCascadeStyle,
String lhsTable,
String[] lhsColumns,
boolean nullable,
int currentDepth) throws MappingException {
// NOTE : we override this form here specifically to account for
// fetch profiles.
// TODO : how to best handle criteria queries?
if ( lockOptions.getLockMode().greaterThan( LockMode.READ ) ) {
return -1;
}
if ( isTooDeep( currentDepth )
|| ( associationType.isCollectionType() && isTooManyCollections() ) ) {
return -1;
}
if ( !isJoinedFetchEnabledInMapping( metadataFetchMode, associationType )
&& !isJoinFetchEnabledByProfile( persister, path, propertyNumber ) ) {
return -1;
}
if ( isDuplicateAssociation( lhsTable, lhsColumns, associationType ) ) {
return -1;
}
return getJoinType( nullable, currentDepth );
}
public String getComment() {
return "load " + getPersister().getEntityName();
}
}