/*
* 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.List;
import org.hibernate.envers.configuration.AuditConfiguration;
import org.hibernate.envers.entities.EntityInstantiator;
import org.hibernate.envers.entities.mapper.relation.query.RelationQueryGenerator;
import org.hibernate.envers.reader.AuditReaderImplementor;
/**
* Initializes a persistent collection.
* @author Adam Warski (adam at warski dot org)
*/
public abstract class AbstractCollectionInitializor<T> implements Initializor<T> {
private final AuditReaderImplementor versionsReader;
private final RelationQueryGenerator queryGenerator;
private final Object primaryKey;
protected final Number revision;
protected final boolean removed;
protected final EntityInstantiator entityInstantiator;
public AbstractCollectionInitializor(AuditConfiguration verCfg,
AuditReaderImplementor versionsReader,
RelationQueryGenerator queryGenerator,
Object primaryKey, Number revision, boolean removed) {
this.versionsReader = versionsReader;
this.queryGenerator = queryGenerator;
this.primaryKey = primaryKey;
this.revision = revision;
this.removed = removed;
entityInstantiator = new EntityInstantiator(verCfg, versionsReader);
}
protected abstract T initializeCollection(int size);
protected abstract void addToCollection(T collection, Object collectionRow);
public T initialize() {
List<?> collectionContent = queryGenerator.getQuery(versionsReader, primaryKey, revision, removed).list();
T collection = initializeCollection(collectionContent.size());
for (Object collectionRow : collectionContent) {
addToCollection(collection, collectionRow);
}
return collection;
}
}