| // Lucene version compatibility level 4.8.1 |
| using System; |
| using System.Collections; |
| using System.Collections.Generic; |
| using System.IO; |
| using System.Runtime.CompilerServices; |
| using System.Threading; |
| |
| namespace Lucene.Net.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. |
| */ |
| |
| using AtomicReaderContext = Lucene.Net.Index.AtomicReaderContext; |
| using DocIdSetIterator = Lucene.Net.Search.DocIdSetIterator; |
| using DoubleDocValues = Lucene.Net.Queries.Function.DocValues.DoubleDocValues; |
| using FunctionValues = Lucene.Net.Queries.Function.FunctionValues; |
| using Int32sRef = Lucene.Net.Util.Int32sRef; |
| using MatchingDocs = FacetsCollector.MatchingDocs; |
| using Scorer = Lucene.Net.Search.Scorer; |
| using ValueSource = Lucene.Net.Queries.Function.ValueSource; |
| using Weight = Lucene.Net.Search.Weight; |
| |
| /// <summary> |
| /// Aggregates sum of values from <see cref="FunctionValues.DoubleVal(int)"/> and <see cref="FunctionValues.DoubleVal(int, double[])"/>, |
| /// for each facet label. |
| /// |
| /// @lucene.experimental |
| /// </summary> |
| public class TaxonomyFacetSumValueSource : SingleTaxonomyFacets |
| { |
| private readonly OrdinalsReader ordinalsReader; |
| |
| /// <summary> |
| /// Aggreggates float facet values from the provided |
| /// <see cref="ValueSource"/>, pulling ordinals using <see cref="DocValuesOrdinalsReader"/> |
| /// against the default indexed |
| /// facet field <see cref="FacetsConfig.DEFAULT_INDEX_FIELD_NAME"/>. |
| /// </summary> |
| public TaxonomyFacetSumValueSource(TaxonomyReader taxoReader, FacetsConfig config, |
| FacetsCollector fc, ValueSource valueSource) |
| : this(new DocValuesOrdinalsReader(FacetsConfig.DEFAULT_INDEX_FIELD_NAME), |
| taxoReader, config, fc, valueSource) |
| { |
| } |
| |
| /// <summary> |
| /// Aggreggates float facet values from the provided |
| /// <see cref="ValueSource"/>, and pulls ordinals from the |
| /// provided <see cref="OrdinalsReader"/>. |
| /// </summary> |
| public TaxonomyFacetSumValueSource(OrdinalsReader ordinalsReader, TaxonomyReader taxoReader, |
| FacetsConfig config, FacetsCollector fc, ValueSource valueSource) |
| : base(ordinalsReader.IndexFieldName, taxoReader, config) |
| { |
| this.ordinalsReader = ordinalsReader; |
| SumValues(fc.GetMatchingDocs(), fc.KeepScores, valueSource); |
| } |
| |
| private sealed class FakeScorer : Scorer |
| { |
| internal float score; |
| internal int docID; |
| internal FakeScorer() |
| : base(null) |
| { |
| } |
| public override float GetScore() |
| { |
| return score; |
| } |
| public override int Freq => throw new NotSupportedException(); |
| |
| public override int DocID => docID; |
| |
| public override int NextDoc() |
| { |
| throw new NotSupportedException(); |
| } |
| public override int Advance(int target) |
| { |
| throw new NotSupportedException(); |
| } |
| public override long GetCost() |
| { |
| return 0; |
| } |
| public override Weight Weight => throw new NotSupportedException(); |
| |
| public override ICollection<ChildScorer> GetChildren() |
| { |
| throw new NotSupportedException(); |
| } |
| } |
| |
| private void SumValues(IList<MatchingDocs> matchingDocs, bool keepScores, ValueSource valueSource) |
| { |
| FakeScorer scorer = new FakeScorer(); |
| IDictionary context = new Dictionary<string, Scorer>(); |
| if (keepScores) |
| { |
| context["scorer"] = scorer; |
| } |
| Int32sRef scratch = new Int32sRef(); |
| foreach (MatchingDocs hits in matchingDocs) |
| { |
| OrdinalsReader.OrdinalsSegmentReader ords = ordinalsReader.GetReader(hits.Context); |
| |
| int scoresIdx = 0; |
| float[] scores = hits.Scores; |
| |
| FunctionValues functionValues = valueSource.GetValues(context, hits.Context); |
| DocIdSetIterator docs = hits.Bits.GetIterator(); |
| |
| int doc; |
| while ((doc = docs.NextDoc()) != DocIdSetIterator.NO_MORE_DOCS) |
| { |
| 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++) |
| { |
| m_values[scratch.Int32s[i]] += value; |
| } |
| } |
| } |
| |
| Rollup(); |
| } |
| |
| /// <summary> |
| /// <see cref="ValueSource"/> that returns the score for each |
| /// hit; use this to aggregate the sum of all hit scores |
| /// for each facet label. |
| /// </summary> |
| public class ScoreValueSource : ValueSource |
| { |
| /// <summary> |
| /// Sole constructor. |
| /// </summary> |
| public ScoreValueSource() |
| { |
| } |
| |
| public override FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext) |
| { |
| Scorer scorer = (Scorer)context["scorer"]; |
| if (scorer == null) |
| { |
| throw new ThreadStateException("scores are missing; be sure to pass keepScores=true to FacetsCollector"); |
| } |
| return new DoubleDocValuesAnonymousClass(this, scorer); |
| } |
| |
| private class DoubleDocValuesAnonymousClass : DoubleDocValues |
| { |
| private readonly Scorer scorer; |
| |
| public DoubleDocValuesAnonymousClass(ScoreValueSource outerInstance, Scorer scorer) |
| : base(outerInstance) |
| { |
| this.scorer = scorer; |
| } |
| |
| public override double DoubleVal(int document) |
| { |
| try |
| { |
| return scorer.GetScore(); |
| } |
| catch (IOException exception) |
| { |
| throw new Exception(exception.ToString(), exception); |
| } |
| } |
| } |
| |
| public override bool Equals(object o) |
| { |
| if (o is null) return false; |
| if (ReferenceEquals(this, o)) return true; |
| if (o.GetType() != this.GetType()) return false; |
| return Equals((ScoreValueSource)o); |
| } |
| |
| protected bool Equals(ScoreValueSource other) |
| { |
| return Equals(this, other); |
| } |
| |
| public override int GetHashCode() |
| { |
| return RuntimeHelpers.GetHashCode(this); |
| } |
| |
| public override string GetDescription() |
| { |
| return "score()"; |
| } |
| } |
| } |
| } |