NullListNode.hpp Source File

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 // NullListNode.hpp
00015 //
00016 // 11 August 2004 -- tds
00017 //
00018 
00019 #ifndef INDRI_NULLLISTNODE_HPP
00020 #define INDRI_NULLLISTNODE_HPP
00021 
00022 #include "indri/ListIteratorNode.hpp"
00023 
00024 class NullListNode : public ListIteratorNode {
00025 private:
00026   greedy_vector<Extent> _extents;
00027   std::string _name;
00028   bool _stopword;
00029 
00030 public:
00031   NullListNode( const std::string& name, bool stopword );
00032 
00033   bool isStopword() const;
00034   const std::string& getName() const;
00035   int nextCandidateDocument();
00036   void prepare( int documentID );
00037   const greedy_vector<Extent>& extents();
00038   void annotate( class Annotator& annotator, int documentID, int begin, int end );
00039 };
00040 
00041 #endif // INDRI_NULLLISTNODE_HPP
00042