Lucene.Net  3.0.3
Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users.
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SpanQuery.cs
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1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
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9  * http://www.apache.org/licenses/LICENSE-2.0
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14  * See the License for the specific language governing permissions and
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16  */
17 
18 using System;
19 
20 using IndexReader = Lucene.Net.Index.IndexReader;
21 using Query = Lucene.Net.Search.Query;
22 using Searcher = Lucene.Net.Search.Searcher;
23 using Weight = Lucene.Net.Search.Weight;
24 
25 namespace Lucene.Net.Search.Spans
26 {
27 
28  /// <summary>Base class for span-based queries. </summary>
29  [Serializable]
30  public abstract class SpanQuery:Query
31  {
32  /// <summary>Expert: Returns the matches for this query in an index. Used internally
33  /// to search for spans.
34  /// </summary>
35  public abstract Spans GetSpans(IndexReader reader);
36 
37  /// <summary>Returns the name of the field matched by this query.</summary>
38  public abstract string Field { get; }
39 
40  public override Weight CreateWeight(Searcher searcher)
41  {
42  return new SpanWeight(this, searcher);
43  }
44  }
45 }