| using System.Collections; |
| using Lucene.Net.Index; |
| |
| 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> |
| /// Returns the value of <see cref="IndexReader.NumDocs"/> |
| /// for every document. This is the number of documents |
| /// excluding deletions. |
| /// </summary> |
| public class NumDocsValueSource : ValueSource |
| { |
| public virtual string Name => "numdocs"; |
| |
| public override string GetDescription() |
| { |
| return Name + "()"; |
| } |
| |
| public override FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext) |
| { |
| // Searcher has no numdocs so we must use the reader instead |
| return new ConstInt32DocValues(ReaderUtil.GetTopLevelContext(readerContext).Reader.NumDocs, this); |
| } |
| |
| public override bool Equals(object o) |
| { |
| return this.GetType() == o.GetType(); |
| } |
| |
| public override int GetHashCode() |
| { |
| return this.GetType().GetHashCode(); |
| } |
| } |
| } |