org.hibernate.envers.internal.entities.mapper.relation.lazy.initializor.ArrayCollectionInitializor Maven / Gradle / Ivy

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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.envers.internal.entities.mapper.relation.lazy.initializor;

import java.util.List;
import java.util.Map;

import org.hibernate.envers.configuration.spi.AuditConfiguration;
import org.hibernate.envers.internal.entities.mapper.relation.MiddleComponentData;
import org.hibernate.envers.internal.entities.mapper.relation.query.RelationQueryGenerator;
import org.hibernate.envers.internal.reader.AuditReaderImplementor;

/**
 * Initializes a map.
 *
 * @author Adam Warski (adam at warski dot org)
 */
public class ArrayCollectionInitializor extends AbstractCollectionInitializor {
	private final MiddleComponentData elementComponentData;
	private final MiddleComponentData indexComponentData;

	public ArrayCollectionInitializor(
			AuditConfiguration verCfg,
			AuditReaderImplementor versionsReader,
			RelationQueryGenerator queryGenerator,
			Object primaryKey, Number revision, boolean removed,
			MiddleComponentData elementComponentData,
			MiddleComponentData indexComponentData) {
		super( verCfg, versionsReader, queryGenerator, primaryKey, revision, removed );

		this.elementComponentData = elementComponentData;
		this.indexComponentData = indexComponentData;
	}

	@Override
	protected Object[] initializeCollection(int size) {
		return new Object[size];
	}

	@Override
	@SuppressWarnings({"unchecked"})
	protected void addToCollection(Object[] collection, Object collectionRow) {
		final Object elementData = ((List) collectionRow).get( elementComponentData.getComponentIndex() );
		final Object element = elementComponentData.getComponentMapper().mapToObjectFromFullMap(
				entityInstantiator,
				(Map) elementData, null, revision
		);

		final Object indexData = ((List) collectionRow).get( indexComponentData.getComponentIndex() );
		final Object indexObj = indexComponentData.getComponentMapper().mapToObjectFromFullMap(
				entityInstantiator,
				(Map) indexData, element, revision
		);
		final int index = ((Number) indexObj).intValue();

		collection[index] = element;
	}
}