package org.apache.lucene.facet.taxonomy;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.IOException;
import java.util.List;
import org.apache.lucene.facet.FacetsCollector;
import org.apache.lucene.facet.FacetsCollector.MatchingDocs;
import org.apache.lucene.facet.FacetsConfig;
import org.apache.lucene.index.BinaryDocValues;
import org.apache.lucene.search.DocIdSetIterator;
import org.apache.lucene.util.BytesRef;
/** Aggregates sum of int values previously indexed with
* {@link IntAssociationFacetField}, assuming the default
* encoding.
*
* @lucene.experimental */
public class TaxonomyFacetSumIntAssociations extends IntTaxonomyFacets {
/** Create {@code TaxonomyFacetSumIntAssociations} against
* the default index field. */
public TaxonomyFacetSumIntAssociations(TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector fc) throws IOException {
this(FacetsConfig.DEFAULT_INDEX_FIELD_NAME, taxoReader, config, fc);
}
/** Create {@code TaxonomyFacetSumIntAssociations} against
* the specified index field. */
public TaxonomyFacetSumIntAssociations(String indexFieldName, TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector fc) throws IOException {
super(indexFieldName, taxoReader, config);
sumValues(fc.getMatchingDocs());
}
private final void sumValues(List<MatchingDocs> matchingDocs) throws IOException {
//System.out.println("count matchingDocs=" + matchingDocs + " facetsField=" + facetsFieldName);
for(MatchingDocs hits : matchingDocs) {
BinaryDocValues dv = hits.context.reader().getBinaryDocValues(indexFieldName);
if (dv == null) { // this reader does not have DocValues for the requested category list
continue;
}
BytesRef scratch = new BytesRef();
DocIdSetIterator docs = hits.bits.iterator();
int doc;
while ((doc = docs.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) {
//System.out.println(" doc=" + doc);
// TODO: use OrdinalsReader? we'd need to add a
// BytesRef getAssociation()?
dv.get(doc, scratch);
byte[] bytes = scratch.bytes;
int end = scratch.offset + scratch.length;
int offset = scratch.offset;
while (offset < end) {
int ord = ((bytes[offset]&0xFF) << 24) |
((bytes[offset+1]&0xFF) << 16) |
((bytes[offset+2]&0xFF) << 8) |
(bytes[offset+3]&0xFF);
offset += 4;
int value = ((bytes[offset]&0xFF) << 24) |
((bytes[offset+1]&0xFF) << 16) |
((bytes[offset+2]&0xFF) << 8) |
(bytes[offset+3]&0xFF);
offset += 4;
values[ord] += value;
}
}
}
rollup();
}
}