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/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2012, 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.entity;
import java.io.Serializable;
import java.util.List;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.util.collections.ArrayHelper;
import org.hibernate.loader.Loader;
import org.hibernate.persister.entity.OuterJoinLoadable;
/**
* @author Steve Ebersole
*/
public class LegacyBatchingEntityLoaderBuilder extends BatchingEntityLoaderBuilder {
public static final LegacyBatchingEntityLoaderBuilder INSTANCE = new LegacyBatchingEntityLoaderBuilder();
@Override
protected UniqueEntityLoader buildBatchingLoader(
OuterJoinLoadable persister,
int batchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
LoadQueryInfluencers influencers) {
return new LegacyBatchingEntityLoader( persister, batchSize, lockMode, factory, influencers );
}
@Override
protected UniqueEntityLoader buildBatchingLoader(
OuterJoinLoadable persister,
int batchSize,
LockOptions lockOptions,
SessionFactoryImplementor factory,
LoadQueryInfluencers influencers) {
return new LegacyBatchingEntityLoader( persister, batchSize, lockOptions, factory, influencers );
}
public static class LegacyBatchingEntityLoader extends BatchingEntityLoader implements UniqueEntityLoader {
private final int[] batchSizes;
private final Loader[] loaders;
public LegacyBatchingEntityLoader(
OuterJoinLoadable persister,
int maxBatchSize,
LockMode lockMode,
SessionFactoryImplementor factory,
LoadQueryInfluencers loadQueryInfluencers) {
super( persister );
this.batchSizes = ArrayHelper.getBatchSizes( maxBatchSize );
this.loaders = new Loader[ batchSizes.length ];
for ( int i = 0; i < batchSizes.length; i++ ) {
this.loaders[i] = new EntityLoader( persister, batchSizes[i], lockMode, factory, loadQueryInfluencers);
}
}
public LegacyBatchingEntityLoader(
OuterJoinLoadable persister,
int maxBatchSize,
LockOptions lockOptions,
SessionFactoryImplementor factory,
LoadQueryInfluencers loadQueryInfluencers) {
super( persister );
this.batchSizes = ArrayHelper.getBatchSizes( maxBatchSize );
this.loaders = new Loader[ batchSizes.length ];
for ( int i = 0; i < batchSizes.length; i++ ) {
this.loaders[i] = new EntityLoader( persister, batchSizes[i], lockOptions, factory, loadQueryInfluencers);
}
}
@Override
public Object load(Serializable id, Object optionalObject, SessionImplementor session, LockOptions lockOptions) {
final Serializable[] batch = session.getPersistenceContext()
.getBatchFetchQueue()
.getEntityBatch( persister(), id, batchSizes[0], persister().getEntityMode() );
for ( int i = 0; i < batchSizes.length-1; i++) {
final int smallBatchSize = batchSizes[i];
if ( batch[smallBatchSize-1] != null ) {
Serializable[] smallBatch = new Serializable[smallBatchSize];
System.arraycopy(batch, 0, smallBatch, 0, smallBatchSize);
// for now...
final List results = loaders[i].loadEntityBatch(
session,
smallBatch,
persister().getIdentifierType(),
optionalObject,
persister().getEntityName(),
id,
persister(),
lockOptions
);
return getObjectFromList(results, id, session); //EARLY EXIT
}
}
return ( (UniqueEntityLoader) loaders[batchSizes.length-1] ).load(id, optionalObject, session);
}
}
}