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FilterRequireNode.hpp

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00001 /*==========================================================================
00002  * Copyright (c) 2004 University of Massachusetts.  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 also available at
00007  * http://www.lemurproject.org/license.html
00008  *
00009  *==========================================================================
00010  */
00011 
00012 
00013 //
00014 // FilterRequireNode
00015 //
00016 // 13 April 2004 -- tds
00017 //
00018 
00019 #ifndef INDRI_FILTERREQUIRENODE_HPP
00020 #define INDRI_FILTERREQUIRENODE_HPP
00021 
00022 #include "indri/BeliefNode.hpp"
00023 #include "indri/ListIteratorNode.hpp"
00024 #include "indri/Extent.hpp"
00025 namespace indri
00026 {
00027   namespace infnet
00028   {
00029     
00030     class FilterRequireNode : public BeliefNode {
00031     private:
00032       ListIteratorNode* _filter;
00033       BeliefNode* _required;
00034       indri::utility::greedy_vector<indri::api::ScoredExtentResult> _extents;
00035       indri::utility::greedy_vector<bool> _matches;
00036       std::string _name;
00037 
00038     public:
00039       FilterRequireNode( const std::string& name, ListIteratorNode* filter, 
00040                          BeliefNode* required );
00041 
00042       double maximumBackgroundScore();
00043       double maximumScore();
00044       const indri::utility::greedy_vector<indri::api::ScoredExtentResult>& score( lemur::api::DOCID_T documentID, indri::index::Extent &extent, int documentLength );
00045       bool hasMatch( lemur::api::DOCID_T documentID );
00046       const indri::utility::greedy_vector<bool>& hasMatch( lemur::api::DOCID_T documentID, const indri::utility::greedy_vector<indri::index::Extent>& extents );
00047 
00048       lemur::api::DOCID_T nextCandidateDocument();
00049       void indexChanged( indri::index::Index& index );
00050 
00051       const std::string& getName() const;
00052       void annotate( class Annotator& annotator, lemur::api::DOCID_T documentID, indri::index::Extent &extent );
00053 
00054       virtual void setSiblingsFlag(int f){
00055         bSiblings=f; // need to set the flag for the current node itself.
00056         if (_required) {  _required->setSiblingsFlag(f); }
00057       }
00058 
00059     };
00060   }
00061 }
00062 
00063 #endif // INDRI_FILTERREQUIRENODE_HPP

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