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


PhraseScorer.h
Go to the documentation of this file.
1 // 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 PHRASESCORER_H
8 #define PHRASESCORER_H
9 
10 #include "Scorer.h"
11 
12 namespace Lucene {
13 
21 class PhraseScorer : public Scorer {
22 public:
24  virtual ~PhraseScorer();
25 
27 
28 protected:
30  ByteArray norms;
31  double value;
32 
33  bool firstTime;
34  bool more;
38 
39  double freq; // phrase frequency in current doc as computed by phraseFreq().
40 
41 public:
42  virtual int32_t docID();
43  virtual int32_t nextDoc();
44  virtual double score();
45  virtual int32_t advance(int32_t target);
46 
48  double currentFreq();
49 
50  virtual String toString();
51 
52 protected:
54  bool doNext();
55 
61  virtual double phraseFreq() = 0;
62 
63  void init();
64  void sort();
65  void pqToList();
66  void firstToLast();
67 };
68 
69 }
70 
71 #endif
Lucene::PhraseScorer::firstToLast
void firstToLast()
Scorer.h
LUCENE_CLASS
#define LUCENE_CLASS(Name)
Definition: LuceneObject.h:24
Lucene::PhraseScorer::phraseFreq
virtual double phraseFreq()=0
For a document containing all the phrase query terms, compute the frequency of the phrase in that doc...
Lucene::Collection
Utility template class to handle collections that can be safely copied and shared.
Definition: Collection.h:17
Lucene::PhraseScorer::toString
virtual String toString()
Returns a string representation of the object.
Lucene::PhraseScorer::more
bool more
Definition: PhraseScorer.h:34
Lucene::PhraseScorer
Scoring functionality for phrase queries. A document is considered matching if it contains the phrase...
Definition: PhraseScorer.h:21
Lucene::PhraseScorer::first
PhrasePositionsPtr first
Definition: PhraseScorer.h:36
Lucene::PhraseScorer::firstTime
bool firstTime
Definition: PhraseScorer.h:33
Lucene::PhraseScorer::nextDoc
virtual int32_t nextDoc()
Advances to the next document in the set and returns the doc it is currently on, or NO_MORE_DOCS if t...
Lucene
Definition: AbstractAllTermDocs.h:12
Lucene::WeightPtr
boost::shared_ptr< Weight > WeightPtr
Definition: LuceneTypes.h:480
Lucene::PhraseScorer::weight
WeightPtr weight
Definition: PhraseScorer.h:26
Lucene::PhraseScorer::freq
double freq
Definition: PhraseScorer.h:39
Lucene::PhraseScorer::~PhraseScorer
virtual ~PhraseScorer()
Lucene::PhraseScorer::docID
virtual int32_t docID()
Returns the following:
Lucene::Scorer
Common scoring functionality for different types of queries.
Definition: Scorer.h:22
Lucene::PhraseScorer::value
double value
Definition: PhraseScorer.h:31
Lucene::PhraseScorer::pqToList
void pqToList()
Lucene::PhraseScorer::init
void init()
Lucene::PhraseScorer::currentFreq
double currentFreq()
Phrase frequency in current doc as computed by phraseFreq().
Lucene::PhraseScorer::pq
PhraseQueuePtr pq
Definition: PhraseScorer.h:35
Lucene::PhraseScorer::sort
void sort()
Lucene::PhraseScorer::doNext
bool doNext()
Next without initial increment.
Lucene::PhraseQueuePtr
boost::shared_ptr< PhraseQueue > PhraseQueuePtr
Definition: LuceneTypes.h:412
Lucene::PhraseScorer::norms
ByteArray norms
Definition: PhraseScorer.h:30
Lucene::Scorer::similarity
SimilarityPtr similarity
Definition: Scorer.h:29
Lucene::PhraseScorer::advance
virtual int32_t advance(int32_t target)
Advances to the first beyond the current whose document number is greater than or equal to target....
Lucene::PhraseScorer::PhraseScorer
PhraseScorer(const WeightPtr &weight, Collection< TermPositionsPtr > tps, Collection< int32_t > offsets, const SimilarityPtr &similarity, ByteArray norms)
Lucene::PhrasePositionsPtr
boost::shared_ptr< PhrasePositions > PhrasePositionsPtr
Definition: LuceneTypes.h:410
Lucene::SimilarityPtr
boost::shared_ptr< Similarity > SimilarityPtr
Definition: LuceneTypes.h:435
Lucene::PhraseScorer::last
PhrasePositionsPtr last
Definition: PhraseScorer.h:37
Lucene::PhraseScorer::score
virtual double score()
Returns the score of the current document matching the query. Initially invalid, until {} or #advanc...

clucene.sourceforge.net