/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.loader.collection;

import java.io.Serializable;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;

import org.hibernate.HibernateException;
import org.hibernate.MappingException;
import org.hibernate.engine.spi.EntityKey;
import org.hibernate.engine.spi.LoadQueryInfluencers;
import org.hibernate.engine.spi.QueryParameters;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.engine.spi.TypedValue;
import org.hibernate.persister.collection.QueryableCollection;
import org.hibernate.type.Type;

Implements subselect fetching for a collection
Author:Gavin King
/** * Implements subselect fetching for a collection * @author Gavin King */
public class SubselectCollectionLoader extends BasicCollectionLoader { private final Serializable[] keys; private final Type[] types; private final Object[] values; private final Map<String, TypedValue> namedParameters; private final Map<String, int[]> namedParameterLocMap; public SubselectCollectionLoader( QueryableCollection persister, String subquery, Collection entityKeys, QueryParameters queryParameters, Map<String, int[]> namedParameterLocMap, SessionFactoryImplementor factory, LoadQueryInfluencers loadQueryInfluencers) throws MappingException { super( persister, 1, subquery, factory, loadQueryInfluencers ); keys = new Serializable[ entityKeys.size() ]; Iterator iter = entityKeys.iterator(); int i=0; while ( iter.hasNext() ) { keys[i++] = ( (EntityKey) iter.next() ).getIdentifier(); } this.namedParameters = queryParameters.getNamedParameters(); this.types = queryParameters.getFilteredPositionalParameterTypes(); this.values = queryParameters.getFilteredPositionalParameterValues(); this.namedParameterLocMap = namedParameterLocMap; } @Override public void initialize(Serializable id, SharedSessionContractImplementor session) throws HibernateException { loadCollectionSubselect( session, keys, values, types, namedParameters, getKeyType() ); } @Override public int[] getNamedParameterLocs(String name) { return namedParameterLocMap.get( name ); } }