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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, Red Hat Inc. 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 Inc.
*
* 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.plan.build.internal.returns;
import org.hibernate.engine.FetchStrategy;
import org.hibernate.loader.plan.build.internal.spaces.QuerySpaceHelper;
import org.hibernate.loader.plan.build.spi.ExpandingCollectionQuerySpace;
import org.hibernate.loader.plan.build.spi.ExpandingFetchSource;
import org.hibernate.loader.plan.spi.CollectionAttributeFetch;
import org.hibernate.loader.plan.spi.FetchSource;
import org.hibernate.persister.walking.spi.AssociationAttributeDefinition;
import org.hibernate.persister.walking.spi.AttributeDefinition;
import org.hibernate.type.CollectionType;
/**
* @author Steve Ebersole
*/
public class CollectionAttributeFetchImpl extends AbstractCollectionReference implements CollectionAttributeFetch {
private final ExpandingFetchSource fetchSource;
private final AttributeDefinition fetchedAttribute;
private final FetchStrategy fetchStrategy;
public CollectionAttributeFetchImpl(
ExpandingFetchSource fetchSource,
AssociationAttributeDefinition fetchedAttribute,
FetchStrategy fetchStrategy,
ExpandingCollectionQuerySpace collectionQuerySpace) {
super(
collectionQuerySpace,
fetchSource.getPropertyPath().append( fetchedAttribute.getName() ),
QuerySpaceHelper.INSTANCE.shouldIncludeJoin( fetchStrategy )
);
this.fetchSource = fetchSource;
this.fetchedAttribute = fetchedAttribute;
this.fetchStrategy = fetchStrategy;
}
@Override
public FetchSource getSource() {
return fetchSource;
}
@Override
public CollectionType getFetchedType() {
return (CollectionType) fetchedAttribute.getType();
}
@Override
public boolean isNullable() {
return true;
}
@Override
public String getAdditionalJoinConditions() {
// only pertinent for HQL...
return null;
}
@Override
public FetchStrategy getFetchStrategy() {
return fetchStrategy;
}
@Override
public String[] toSqlSelectFragments(String alias) {
return null;
}
// @Override
// public void hydrate(ResultSet resultSet, ResultSetProcessingContext context) throws SQLException {
// //To change body of implemented methods use File | Settings | File Templates.
// }
//
// @Override
// public Object resolve(ResultSet resultSet, ResultSetProcessingContext context) throws SQLException {
// return null;
// }
//
// @Override
// public void read(ResultSet resultSet, ResultSetProcessingContext context, Object owner) throws SQLException {
// final Serializable collectionRowKey = (Serializable) getCollectionPersister().readKey(
// resultSet,
// context.getAliasResolutionContext().resolveAliases( this ).getCollectionColumnAliases().getSuffixedKeyAliases(),
// context.getSession()
// );
//
// final PersistenceContext persistenceContext = context.getSession().getPersistenceContext();
//
// if ( collectionRowKey == null ) {
// // we did not find a collection element in the result set, so we
// // ensure that a collection is created with the owner's identifier,
// // since what we have is an empty collection
// final EntityKey ownerEntityKey = findOwnerEntityKey( context );
// if ( ownerEntityKey == null ) {
// // should not happen
// throw new IllegalStateException(
// "Could not locate owner's EntityKey during attempt to read collection element fro JDBC row : " +
// getPropertyPath().getFullPath()
// );
// }
//
// if ( log.isDebugEnabled() ) {
// log.debugf(
// "Result set contains (possibly empty) collection: %s",
// MessageHelper.collectionInfoString(
// getCollectionPersister(),
// ownerEntityKey,
// context.getSession().getFactory()
// )
// );
// }
//
// persistenceContext.getLoadContexts()
// .getCollectionLoadContext( resultSet )
// .getLoadingCollection( getCollectionPersister(), ownerEntityKey );
// }
// else {
// // we found a collection element in the result set
// if ( log.isDebugEnabled() ) {
// log.debugf(
// "Found row of collection: %s",
// MessageHelper.collectionInfoString(
// getCollectionPersister(),
// collectionRowKey,
// context.getSession().getFactory()
// )
// );
// }
//
// PersistentCollection rowCollection = persistenceContext.getLoadContexts()
// .getCollectionLoadContext( resultSet )
// .getLoadingCollection( getCollectionPersister(), collectionRowKey );
//
// final CollectionAliases descriptor = context.getAliasResolutionContext().resolveAliases( this ).getCollectionColumnAliases();
//
// if ( rowCollection != null ) {
// final Object element = rowCollection.readFrom( resultSet, getCollectionPersister(), descriptor, owner );
//
// if ( getElementGraph() != null ) {
// for ( Fetch fetch : getElementGraph().getFetches() ) {
// fetch.read( resultSet, context, element );
// }
// }
// }
// }
// }
//
// private EntityKey findOwnerEntityKey(ResultSetProcessingContext context) {
// return context.getProcessingState( findOwnerEntityReference( getOwner() ) ).getEntityKey();
// }
//
// private EntityReference findOwnerEntityReference(FetchOwner owner) {
// return Helper.INSTANCE.findOwnerEntityReference( owner );
// }
@Override
public AttributeDefinition getFetchedAttributeDefinition() {
return fetchedAttribute;
}
}
