Lucene.Net  3.0.3
Lucene.Net is a .NET port of the Java Lucene Indexing Library
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ReqOptSumScorer.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
4  * this work for additional information regarding copyright ownership.
5  * The ASF licenses this file to You under the Apache License, Version 2.0
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7  * the License. You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
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14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 
18 using System;
19 
20 namespace Lucene.Net.Search
21 {
22 
29  {
33  private Scorer reqScorer;
34  private Scorer optScorer;
35 
41  public ReqOptSumScorer(Scorer reqScorer, Scorer optScorer):base(null)
42  { // No similarity used.
43  this.reqScorer = reqScorer;
44  this.optScorer = optScorer;
45  }
46 
47  public override int NextDoc()
48  {
49  return reqScorer.NextDoc();
50  }
51 
52  public override int Advance(int target)
53  {
54  return reqScorer.Advance(target);
55  }
56 
57  public override int DocID()
58  {
59  return reqScorer.DocID();
60  }
61 
68  public override float Score()
69  {
70  int curDoc = reqScorer.DocID();
71  float reqScore = reqScorer.Score();
72  if (optScorer == null)
73  {
74  return reqScore;
75  }
76 
77  int optScorerDoc = optScorer.DocID();
78  if (optScorerDoc < curDoc && (optScorerDoc = optScorer.Advance(curDoc)) == NO_MORE_DOCS)
79  {
80  optScorer = null;
81  return reqScore;
82  }
83 
84  return optScorerDoc == curDoc?reqScore + optScorer.Score():reqScore;
85  }
86  }
87 }