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FieldIteratorNode.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 // FieldIteratorNode
00015 //
00016 // 23 February 2004 -- tds
00017 //
00018 
00019 #ifndef INDRI_FIELDITERATORNODE_HPP
00020 #define INDRI_FIELDITERATORNODE_HPP
00021 
00022 #include "indri/ListIteratorNode.hpp"
00023 #include "indri/DocExtentListIterator.hpp"
00024 namespace indri
00025 {
00026   namespace infnet
00027   {
00028     
00029     class FieldIteratorNode : public ListIteratorNode {
00030     private:
00031       class indri::index::DocExtentListIterator* _list;
00032       int _listID;
00033       indri::utility::greedy_vector<indri::index::Extent> _extents;
00034       indri::utility::greedy_vector<INT64> _numbers;
00035       class InferenceNetwork& _network;
00036       std::string _name;
00037 
00038     public:
00039       FieldIteratorNode( const std::string& name, class InferenceNetwork& network, int fieldID );
00040       void prepare( lemur::api::DOCID_T documentID );
00042       const indri::utility::greedy_vector<indri::index::Extent>& extents(); 
00043       const indri::utility::greedy_vector<INT64>& numbers();
00044       lemur::api::DOCID_T nextCandidateDocument();
00045       void indexChanged( indri::index::Index& index );
00046       const std::string& getName() const;
00047       void annotate( class Annotator& annotator, lemur::api::DOCID_T documentID, indri::index::Extent &extent );
00048     };
00049   }
00050 }
00051 
00052 #endif // INDRI_FIELDITERATORNODE_HPP
00053 

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