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ExtentEnforcementNode.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 // ExtentEnforcementNode
00015 //
00016 // 31 Aug 2005 -- pto
00017 //
00018 
00019 // Behaves like extent restriction, but preserves the child's extents
00020 // rather than using the field extents.  It merely enforces that
00021 // the child extents be contained within the field extents.
00022 
00023 #ifndef INDRI_EXTENTENFORCEMENTNODE_HPP
00024 #define INDRI_EXTENTENFORCEMENTNODE_HPP
00025 
00026 #include "indri/ExtentRestrictionNode.hpp"
00027 
00028 namespace indri
00029 {
00030   namespace infnet
00031   {
00032     
00033     class ExtentEnforcementNode : public BeliefNode {
00034     private:
00035       BeliefNode* _child;
00036       ListIteratorNode* _field;
00037       indri::utility::greedy_vector<indri::api::ScoredExtentResult> _scores;
00038       indri::utility::greedy_vector<bool> _matches;
00039       std::string _name;
00040 
00041     public:
00042       ExtentEnforcementNode( const std::string& name, BeliefNode* child, ListIteratorNode* field );
00043 
00044       lemur::api::DOCID_T nextCandidateDocument();
00045       void indexChanged( indri::index::Index& index );
00046 
00047       double maximumScore();
00048       double maximumBackgroundScore();
00049 
00050       const indri::utility::greedy_vector<indri::api::ScoredExtentResult>& score( lemur::api::DOCID_T documentID, indri::index::Extent &extent, int documentLength );
00051       void annotate( class Annotator& annotator, lemur::api::DOCID_T documentID, indri::index::Extent &extent );
00052       bool hasMatch( lemur::api::DOCID_T documentID );
00053       const indri::utility::greedy_vector<bool>& hasMatch( lemur::api::DOCID_T documentID, const indri::utility::greedy_vector<indri::index::Extent>& extents );
00054       const std::string& getName() const;
00055 
00058       void setSiblingsFlag(int f);
00059     };
00060   }
00061 }
00062 
00063 #endif // INDRI_EXTENTENFORCEMENTNODE_HPP

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