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FieldEqualsNode.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 // FieldEqualsNode.hpp
00014 //
00015 // 26 October 2004 -- tds
00016 //
00017 
00018 #ifndef INDRI_FIELDEQUALSNODE_HPP
00019 #define INDRI_FIELDEQUALSNODE_HPP
00020 
00021 #include "indri/ListIteratorNode.hpp"
00022 #include "indri/greedy_vector"
00023 #include "lemur-platform.h"
00024 namespace indri
00025 {
00026   namespace infnet
00027   {
00028     
00029     class FieldEqualsNode : public ListIteratorNode {
00030     private:
00031       class FieldIteratorNode* _field;
00032       indri::utility::greedy_vector<indri::index::Extent> _extents;
00033       INT64 _constant;
00034       std::string _name;
00035 
00036     public:
00037       FieldEqualsNode( const std::string& name, class FieldIteratorNode* iterator, INT64 constant );
00038 
00039       void prepare( lemur::api::DOCID_T documentID );
00040       indri::utility::greedy_vector<indri::index::Extent>& extents();
00041   
00042       lemur::api::DOCID_T nextCandidateDocument();
00043       void indexChanged( indri::index::Index& index );
00044 
00045       const std::string& getName() const;
00046       void annotate( class Annotator& annotator, lemur::api::DOCID_T documentID, indri::index::Extent &extent );
00047     };
00048   }
00049 }
00050 
00051 #endif // INDRI_FIELDEQUALSNODE_HPP
00052 

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