| /* |
| * 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. |
| */ |
| package org.apache.lucene.facet.taxonomy; |
| |
| 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.search.DocIdSetIterator; |
| import org.apache.lucene.search.DoubleValues; |
| import org.apache.lucene.search.DoubleValuesSource; |
| import org.apache.lucene.util.IntsRef; |
| |
| /** Aggregates sum of values from {@link |
| * DoubleValues#doubleValue()}, for each facet label. |
| * |
| * @lucene.experimental */ |
| public class TaxonomyFacetSumValueSource extends FloatTaxonomyFacets { |
| private final OrdinalsReader ordinalsReader; |
| |
| /** |
| * Aggreggates double facet values from the provided |
| * {@link DoubleValuesSource}, pulling ordinals using {@link |
| * DocValuesOrdinalsReader} against the default indexed |
| * facet field {@link FacetsConfig#DEFAULT_INDEX_FIELD_NAME}. |
| */ |
| public TaxonomyFacetSumValueSource(TaxonomyReader taxoReader, FacetsConfig config, |
| FacetsCollector fc, DoubleValuesSource valueSource) throws IOException { |
| this(new DocValuesOrdinalsReader(FacetsConfig.DEFAULT_INDEX_FIELD_NAME), taxoReader, config, fc, valueSource); |
| } |
| |
| /** |
| * Aggreggates float facet values from the provided |
| * {@link DoubleValuesSource}, and pulls ordinals from the |
| * provided {@link OrdinalsReader}. |
| */ |
| public TaxonomyFacetSumValueSource(OrdinalsReader ordinalsReader, TaxonomyReader taxoReader, |
| FacetsConfig config, FacetsCollector fc, DoubleValuesSource vs) throws IOException { |
| super(ordinalsReader.getIndexFieldName(), taxoReader, config); |
| this.ordinalsReader = ordinalsReader; |
| sumValues(fc.getMatchingDocs(), fc.getKeepScores(), vs); |
| } |
| |
| private static DoubleValues scores(MatchingDocs hits) { |
| return new DoubleValues() { |
| |
| int index = -1; |
| |
| @Override |
| public double doubleValue() throws IOException { |
| return hits.scores[index]; |
| } |
| |
| @Override |
| public boolean advanceExact(int doc) throws IOException { |
| index++; |
| return true; |
| } |
| }; |
| } |
| |
| private void sumValues(List<MatchingDocs> matchingDocs, boolean keepScores, DoubleValuesSource valueSource) throws IOException { |
| |
| IntsRef scratch = new IntsRef(); |
| for(MatchingDocs hits : matchingDocs) { |
| OrdinalsReader.OrdinalsSegmentReader ords = ordinalsReader.getReader(hits.context); |
| DoubleValues scores = keepScores ? scores(hits) : null; |
| DoubleValues functionValues = valueSource.getValues(hits.context, scores); |
| DocIdSetIterator docs = hits.bits.iterator(); |
| |
| int doc; |
| while ((doc = docs.nextDoc()) != DocIdSetIterator.NO_MORE_DOCS) { |
| ords.get(doc, scratch); |
| if (functionValues.advanceExact(doc)) { |
| float value = (float) functionValues.doubleValue(); |
| for (int i = 0; i < scratch.length; i++) { |
| values[scratch.ints[i]] += value; |
| } |
| } |
| } |
| } |
| |
| rollup(); |
| } |
| |
| } |