Lucene++ - a full-featured, c++ search engine
API Documentation


 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Pages
SimilarityDelegator.h
Go to the documentation of this file.
1 // Copyright (c) 2009-2011 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  {
18  public:
20  virtual ~SimilarityDelegator();
21 
23 
24  protected:
25  SimilarityPtr delegee;
26 
27  public:
28  virtual double computeNorm(const String& field, FieldInvertStatePtr state);
29  virtual double lengthNorm(const String& fieldName, int32_t numTokens);
30  virtual double queryNorm(double sumOfSquaredWeights);
31  virtual double tf(double freq);
32  virtual double sloppyFreq(int32_t distance);
33  virtual double idf(int32_t docFreq, int32_t numDocs);
34  virtual double coord(int32_t overlap, int32_t maxOverlap);
35  virtual double scorePayload(int32_t docId, const String& fieldName, int32_t start, int32_t end, ByteArray payload, int32_t offset, int32_t length);
36  };
37 }
38 
39 #endif

clucene.sourceforge.net