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NestedListBeliefNode.hpp

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00001 /*==========================================================================
00002  * Copyright (c) 2006 Carnegie Mellon University.  All Rights Reserved.
00003  *
00004  * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
00005  * is subject to the terms of the software license set forth in the LICENSE
00006  * file included with this software (and below), and also available at
00007  * http://www.lemurproject.org/license.html
00008  *
00009  *==========================================================================
00010  */
00011 
00012 
00013 //
00014 // NestedListBeliefNode
00015 //
00016 // 30 Aug 2005 -- pto
00017 //
00018 
00019 #ifndef INDRI_NESTEDLISTBELIEFNODE_HPP
00020 #define INDRI_NESTEDLISTBELIEFNODE_HPP
00021 
00022 #include "indri/BeliefNode.hpp"
00023 #include "indri/TermScoreFunction.hpp"
00024 #include "indri/greedy_vector"
00025 #include "indri/ListIteratorNode.hpp"
00026 #include "indri/ScoredExtentResult.hpp"
00027 namespace indri
00028 {
00029   namespace infnet
00030   {
00031     
00032     class NestedListBeliefNode : public BeliefNode {
00033     private:
00034       ListIteratorNode& _list;
00035       ListIteratorNode* _context;
00036       ListIteratorNode* _raw;
00037       double _maximumScore;
00038       double _maximumBackgroundScore;
00039       indri::query::TermScoreFunction& _scoreFunction;
00040       indri::utility::greedy_vector<indri::api::ScoredExtentResult> _scores;
00041       indri::utility::greedy_vector<bool> _matches;
00042       std::string _name;
00043       bool _documentSmoothing;
00044 
00045     private:
00046       // computes the length of the scored context
00047       inline int _contextLength( int begin, int end );
00048       inline double _contextOccurrences( int begin, int end );
00049       inline double _documentOccurrences();
00050 
00051     public:
00052       NestedListBeliefNode( const std::string& name,
00053                             ListIteratorNode& child,
00054                             ListIteratorNode* context,
00055                             ListIteratorNode* raw,
00056                             indri::query::TermScoreFunction& scoreFunction,
00057                             double maximumBackgroundScore,
00058                             double maximumScore );
00059       
00060       lemur::api::DOCID_T nextCandidateDocument();
00061       void indexChanged( indri::index::Index& index );
00062       double maximumBackgroundScore();
00063       double maximumScore();
00064       const indri::utility::greedy_vector<indri::api::ScoredExtentResult>& score( lemur::api::DOCID_T documentID, indri::index::Extent &extent, int documentLength );
00065       void annotate( class Annotator& annotator, lemur::api::DOCID_T documentID, indri::index::Extent &extent );
00066       bool hasMatch( lemur::api::DOCID_T documentID );
00067       const indri::utility::greedy_vector<bool>& hasMatch( lemur::api::DOCID_T documentID, const indri::utility::greedy_vector<indri::index::Extent>& extents );
00068       const std::string& getName() const;
00069     };
00070   }
00071 }
00072 
00073 #endif // INDRI_NESTEDLISTBELIEFNODE_HPP

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