forked from apache/lucenenet
/
MaxDocValueSource.cs
60 lines (53 loc) · 2.04 KB
/
MaxDocValueSource.cs
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// Lucene version compatibility level 4.8.1
using Lucene.Net.Index;
using Lucene.Net.Search;
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>
/// Returns the value of <see cref="IndexReader.MaxDoc"/>
/// for every document. This is the number of documents
/// including deletions.
/// </summary>
public class MaxDocValueSource : ValueSource
{
public virtual string Name => "maxdoc";
public override string GetDescription()
{
return Name + "()";
}
public override void CreateWeight(IDictionary context, IndexSearcher searcher)
{
context["searcher"] = searcher;
}
public override FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext)
{
var searcher = (IndexSearcher)context["searcher"];
return new ConstInt32DocValues(searcher.IndexReader.MaxDoc, this);
}
public override bool Equals(object o)
{
return this.GetType() == o.GetType();
}
public override int GetHashCode()
{
return this.GetType().GetHashCode();
}
}
}