org.hibernate.envers.internal.entities.mapper.relation.lazy.initializor.AbstractCollectionInitializor Maven / Gradle / Ivy
/*
* 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
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*/
package org.hibernate.envers.internal.entities.mapper.relation.lazy.initializor;
import java.util.List;
import org.hibernate.envers.configuration.spi.AuditConfiguration;
import org.hibernate.envers.internal.entities.EntityInstantiator;
import org.hibernate.envers.internal.entities.mapper.relation.query.RelationQueryGenerator;
import org.hibernate.envers.internal.reader.AuditReaderImplementor;
/**
* Initializes a persistent collection.
*
* @author Adam Warski (adam at warski dot org)
*/
public abstract class AbstractCollectionInitializor implements Initializor {
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);
@Override
public T initialize() {
final List collectionContent = queryGenerator.getQuery( versionsReader, primaryKey, revision, removed ).list();
final T collection = initializeCollection( collectionContent.size() );
for ( Object collectionRow : collectionContent ) {
addToCollection( collection, collectionRow );
}
return collection;
}
}