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SimilarityDelegator.h
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1 
2 // Copyright (c) 2009-2014 Alan Wright. All rights reserved.
3 // Distributable under the terms of either the Apache License (Version 2.0)
4 // or the GNU Lesser General Public License.
6 
7 #ifndef SIMILARITYDELEGATOR_H
8 #define SIMILARITYDELEGATOR_H
9 
10 #include "Similarity.h"
11 
12 namespace Lucene {
13 
16 class LPPAPI SimilarityDelegator : public Similarity {
17 public:
18  SimilarityDelegator(const SimilarityPtr& delegee);
19  virtual ~SimilarityDelegator();
20 
22 
23 protected:
24  SimilarityPtr delegee;
25 
26 public:
27  virtual double computeNorm(const String& field, const FieldInvertStatePtr& state);
28  virtual double lengthNorm(const String& fieldName, int32_t numTokens);
29  virtual double queryNorm(double sumOfSquaredWeights);
30  virtual double tf(double freq);
31  virtual double sloppyFreq(int32_t distance);
32  virtual double idf(int32_t docFreq, int32_t numDocs);
33  virtual double coord(int32_t overlap, int32_t maxOverlap);
34  virtual double scorePayload(int32_t docId, const String& fieldName, int32_t start, int32_t end, ByteArray payload, int32_t offset, int32_t length);
35 };
36 
37 }
38 
39 #endif

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