org.hibernate.loader.collection.SubselectOneToManyLoader.java Source code

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Here is the source code for org.hibernate.loader.collection.SubselectOneToManyLoader.java

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/*
 * 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 one to many association
 * @author Gavin King
 */
public class SubselectOneToManyLoader extends OneToManyLoader {

    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 SubselectOneToManyLoader(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);
    }

}