/*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.search.query.collector.impl;
import java.io.IOException;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Collector;
import org.hibernate.search.query.fieldcache.impl.FieldLoadingStrategy;
/**
* {@code FieldCacheCollector} using an internal array to collect extracted values
* from the {@link org.apache.lucene.search.FieldCache}. Note that the size of the array is as big as the number
* of {@code Document}s in the index, so if we only need to collect a small amount
* of values other implementations are likely able to be more conservative
* on memory requirements.
*
* @author Sanne Grinovero <sanne@hibernate.org> (C) 2011 Red Hat Inc.
*/
final class BigArrayFieldCacheCollectorImpl extends FieldCacheCollector {
private final Object[] valuePerDocumentId;
private int currentDocBase;
private final FieldLoadingStrategy cacheLoadingStrategy;
public BigArrayFieldCacheCollectorImpl(Collector delegate, FieldLoadingStrategy cacheLoadingStrategy, Object[] valueContainer) {
super( delegate );
this.cacheLoadingStrategy = cacheLoadingStrategy;
this.valuePerDocumentId = valueContainer;
}
@Override
public void collect(int doc) throws IOException {
//warning when changing this method: extremely performance sensitive!
this.delegate.collect( doc );
this.valuePerDocumentId[currentDocBase + doc] = cacheLoadingStrategy.collect( doc );
}
@Override
public void setNextReader(IndexReader reader, int docBase) throws IOException {
this.currentDocBase = docBase;
this.cacheLoadingStrategy.loadNewCacheValues( reader );
this.delegate.setNextReader( reader, docBase );
}
public Object getValue(int docId) {
return valuePerDocumentId[docId];
}
}