/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2013, 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.collection.plan;
import java.sql.ResultSet;
import org.hibernate.LockMode;
import org.hibernate.LockOptions;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.internal.CoreLogging;
import org.hibernate.loader.plan.exec.query.spi.QueryBuildingParameters;
import org.hibernate.persister.collection.QueryableCollection;
import org.hibernate.type.Type;
import org.jboss.logging.Logger;
Superclass for loaders that initialize collections
Author: Gavin King, Gail Badner See Also: - OneToManyLoader
- BasicCollectionLoader
/**
* Superclass for loaders that initialize collections
*
* @see org.hibernate.loader.collection.OneToManyLoader
* @see org.hibernate.loader.collection.BasicCollectionLoader
* @author Gavin King
* @author Gail Badner
*/
public class CollectionLoader extends AbstractLoadPlanBasedCollectionInitializer {
private static final Logger log = CoreLogging.logger( CollectionLoader.class );
public static Builder forCollection(QueryableCollection collectionPersister) {
return new Builder( collectionPersister );
}
@Override
protected int[] getNamedParameterLocs(String name) {
return new int[0]; //To change body of implemented methods use File | Settings | File Templates.
}
@Override
protected void autoDiscoverTypes(ResultSet rs) {
//To change body of implemented methods use File | Settings | File Templates.
}
protected static class Builder {
private final QueryableCollection collectionPersister;
private int batchSize = 1;
private LoadQueryInfluencers influencers = LoadQueryInfluencers.NONE;
private Builder(QueryableCollection collectionPersister) {
this.collectionPersister = collectionPersister;
}
public Builder withBatchSize(int batchSize) {
this.batchSize = batchSize;
return this;
}
public Builder withInfluencers(LoadQueryInfluencers influencers) {
this.influencers = influencers;
return this;
}
public CollectionLoader byKey() {
final QueryBuildingParameters buildingParameters = new QueryBuildingParameters() {
@Override
public LoadQueryInfluencers getQueryInfluencers() {
return influencers;
}
@Override
public int getBatchSize() {
return batchSize;
}
@Override
public LockMode getLockMode() {
return LockMode.NONE;
}
@Override
public LockOptions getLockOptions() {
return null;
}
};
return new CollectionLoader( collectionPersister, buildingParameters ) ;
}
}
public CollectionLoader(
QueryableCollection collectionPersister,
QueryBuildingParameters buildingParameters) {
super( collectionPersister, buildingParameters );
if ( log.isDebugEnabled() ) {
log.debugf(
"Static select for collection %s: %s",
collectionPersister.getRole(),
getStaticLoadQuery().getSqlStatement()
);
}
}
protected Type getKeyType() {
return collectionPersister().getKeyType();
}
public String toString() {
return getClass().getName() + '(' + collectionPersister().getRole() + ')';
}
}