| 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.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.lucene.facet.DocValuesOrdinalsReader; |
| import org.apache.lucene.facet.FacetsCollector; |
| import org.apache.lucene.facet.FacetsCollector.MatchingDocs; |
| import org.apache.lucene.facet.FacetsConfig; |
| import org.apache.lucene.facet.OrdinalsReader; |
| import org.apache.lucene.index.AtomicReaderContext; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.queries.function.docvalues.DoubleDocValues; |
| import org.apache.lucene.search.Scorer; |
| import org.apache.lucene.util.FixedBitSet; |
| import org.apache.lucene.util.IntsRef; |
| |
| /** Aggregates sum of values from {@link |
| * FunctionValues#doubleVal}, for each facet label. |
| * |
| * @lucene.experimental */ |
| public class TaxonomyFacetSumValueSource extends FloatTaxonomyFacets { |
| private final OrdinalsReader ordinalsReader; |
| |
| /** Aggreggates float facet values from the provided |
| * {@link ValueSource}, 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, ValueSource valueSource) throws IOException { |
| this(new DocValuesOrdinalsReader(FacetsConfig.DEFAULT_INDEX_FIELD_NAME), taxoReader, config, fc, valueSource); |
| } |
| |
| /** Aggreggates float facet values from the provided |
| * {@link ValueSource}, and pulls ordinals from the |
| * provided {@link OrdinalsReader}. */ |
| public TaxonomyFacetSumValueSource(OrdinalsReader ordinalsReader, TaxonomyReader taxoReader, |
| FacetsConfig config, FacetsCollector fc, ValueSource valueSource) throws IOException { |
| super(ordinalsReader.getIndexFieldName(), taxoReader, config); |
| this.ordinalsReader = ordinalsReader; |
| sumValues(fc.getMatchingDocs(), fc.getKeepScores(), valueSource); |
| } |
| |
| private static final class FakeScorer extends Scorer { |
| float score; |
| int docID; |
| FakeScorer() { super(null); } |
| @Override public float score() throws IOException { return score; } |
| @Override public int freq() throws IOException { throw new UnsupportedOperationException(); } |
| @Override public int docID() { return docID; } |
| @Override public int nextDoc() throws IOException { throw new UnsupportedOperationException(); } |
| @Override public int advance(int target) throws IOException { throw new UnsupportedOperationException(); } |
| @Override public long cost() { return 0; } |
| } |
| |
| private final void sumValues(List<MatchingDocs> matchingDocs, boolean keepScores, ValueSource valueSource) throws IOException { |
| final FakeScorer scorer = new FakeScorer(); |
| Map<String, Scorer> context = new HashMap<String, Scorer>(); |
| if (keepScores) { |
| context.put("scorer", scorer); |
| } |
| IntsRef scratch = new IntsRef(); |
| for(MatchingDocs hits : matchingDocs) { |
| OrdinalsReader.OrdinalsSegmentReader ords = ordinalsReader.getReader(hits.context); |
| FixedBitSet bits = hits.bits; |
| |
| final int length = hits.bits.length(); |
| int doc = 0; |
| int scoresIdx = 0; |
| float[] scores = hits.scores; |
| |
| FunctionValues functionValues = valueSource.getValues(context, hits.context); |
| while (doc < length && (doc = bits.nextSetBit(doc)) != -1) { |
| ords.get(doc, scratch); |
| if (keepScores) { |
| scorer.docID = doc; |
| scorer.score = scores[scoresIdx++]; |
| } |
| float value = (float) functionValues.doubleVal(doc); |
| for(int i=0;i<scratch.length;i++) { |
| values[scratch.ints[i]] += value; |
| } |
| ++doc; |
| } |
| } |
| |
| rollup(); |
| } |
| |
| /** {@link ValueSource} that returns the score for each |
| * hit; use this to aggregate the sum of all hit scores |
| * for each facet label. */ |
| public static class ScoreValueSource extends ValueSource { |
| |
| /** Sole constructor. */ |
| public ScoreValueSource() { |
| } |
| |
| @Override |
| public FunctionValues getValues(@SuppressWarnings("rawtypes") Map context, AtomicReaderContext readerContext) throws IOException { |
| final Scorer scorer = (Scorer) context.get("scorer"); |
| if (scorer == null) { |
| throw new IllegalStateException("scores are missing; be sure to pass keepScores=true to FacetsCollector"); |
| } |
| return new DoubleDocValues(this) { |
| @Override |
| public double doubleVal(int document) { |
| try { |
| return scorer.score(); |
| } catch (IOException exception) { |
| throw new RuntimeException(exception); |
| } |
| } |
| }; |
| } |
| |
| @Override public boolean equals(Object o) { return o == this; } |
| @Override public int hashCode() { return System.identityHashCode(this); } |
| @Override public String description() { return "score()"; } |
| } |
| |
| } |