| // Lucene version compatibility level 4.8.1 |
| using Lucene.Net.Index; |
| using Lucene.Net.Queries.Function.DocValues; |
| using Lucene.Net.Search; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections; |
| |
| namespace Lucene.Net.Queries.Function.ValueSources |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// <see cref="TotalTermFreqValueSource"/> returns the total term freq |
| /// (sum of term freqs across all documents). |
| /// Returns -1 if frequencies were omitted for the field, or if |
| /// the codec doesn't support this statistic. |
| /// @lucene.internal |
| /// </summary> |
| public class TotalTermFreqValueSource : ValueSource |
| { |
| protected readonly string m_field; |
| protected readonly string m_indexedField; |
| protected readonly string m_val; |
| protected readonly BytesRef m_indexedBytes; |
| |
| public TotalTermFreqValueSource(string field, string val, string indexedField, BytesRef indexedBytes) |
| { |
| this.m_field = field; |
| this.m_val = val; |
| this.m_indexedField = indexedField; |
| this.m_indexedBytes = indexedBytes; |
| } |
| |
| public virtual string Name => "totaltermfreq"; |
| |
| public override string GetDescription() |
| { |
| return Name + '(' + m_field + ',' + m_val + ')'; |
| } |
| |
| public override FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext) |
| { |
| return (FunctionValues)context[this]; |
| } |
| |
| public override void CreateWeight(IDictionary context, IndexSearcher searcher) |
| { |
| long totalTermFreq = 0; |
| foreach (var readerContext in searcher.TopReaderContext.Leaves) |
| { |
| long val = readerContext.Reader.TotalTermFreq(new Term(m_indexedField, m_indexedBytes)); |
| if (val == -1) |
| { |
| totalTermFreq = -1; |
| break; |
| } |
| else |
| { |
| totalTermFreq += val; |
| } |
| } |
| var ttf = totalTermFreq; |
| context[this] = new Int64DocValuesAnonymousClass(this, ttf); |
| } |
| |
| private class Int64DocValuesAnonymousClass : Int64DocValues |
| { |
| private readonly long ttf; |
| |
| public Int64DocValuesAnonymousClass(TotalTermFreqValueSource @this, long ttf) |
| : base(@this) |
| { |
| this.ttf = ttf; |
| } |
| |
| /// <summary> |
| /// NOTE: This was longVal() in Lucene |
| /// </summary> |
| public override long Int64Val(int doc) |
| { |
| return ttf; |
| } |
| } |
| |
| public override int GetHashCode() |
| { |
| return this.GetType().GetHashCode() + m_indexedField.GetHashCode() * 29 + m_indexedBytes.GetHashCode(); |
| } |
| |
| public override bool Equals(object o) |
| { |
| if (!(o is TotalTermFreqValueSource other)) |
| return false; |
| return this.m_indexedField.Equals(other.m_indexedField, StringComparison.Ordinal) && this.m_indexedBytes.Equals(other.m_indexedBytes); |
| } |
| } |
| } |