/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, 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.envers.entities.mapper.relation.lazy.initializor;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.hibernate.envers.configuration.AuditConfiguration;
import org.hibernate.envers.entities.mapper.relation.MiddleComponentData;
import org.hibernate.envers.entities.mapper.relation.query.RelationQueryGenerator;
import org.hibernate.envers.reader.AuditReaderImplementor;
/**
* Initializes a map.
* @author Adam Warski (adam at warski dot org)
*/
public class ListCollectionInitializor extends AbstractCollectionInitializor<List> {
private final MiddleComponentData elementComponentData;
private final MiddleComponentData indexComponentData;
public ListCollectionInitializor(AuditConfiguration verCfg,
AuditReaderImplementor versionsReader,
RelationQueryGenerator queryGenerator,
Object primaryKey, Number revision,
MiddleComponentData elementComponentData,
MiddleComponentData indexComponentData) {
super(verCfg, versionsReader, queryGenerator, primaryKey, revision);
this.elementComponentData = elementComponentData;
this.indexComponentData = indexComponentData;
}
@SuppressWarnings({"unchecked"})
protected List initializeCollection(int size) {
// Creating a list of the given capacity with all elements null initially. This ensures that we can then
// fill the elements safely using the <code>List.set</code> method.
List list = new ArrayList(size);
for (int i=0; i<size; i++) { list.add(null); }
return list;
}
@SuppressWarnings({"unchecked"})
protected void addToCollection(List collection, Object collectionRow) {
// collectionRow will be the actual object if retrieved from audit relation or middle table
// otherwise it will be a List
Object elementData = collectionRow;
Object indexData = collectionRow;
if (collectionRow instanceof java.util.List) {
elementData = ((List) collectionRow).get(elementComponentData.getComponentIndex());
indexData = ((List) collectionRow).get(indexComponentData.getComponentIndex());
}
Object element = elementData instanceof Map ?
elementComponentData.getComponentMapper().mapToObjectFromFullMap(entityInstantiator,
(Map<String, Object>) elementData, null, revision)
: elementData ;
Object indexObj = indexComponentData.getComponentMapper().mapToObjectFromFullMap(entityInstantiator,
(Map<String, Object>) indexData, element, revision);
int index = ((Number) indexObj).intValue();
collection.set(index, element);
}
}