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CombinedVocabularyIterator.hpp

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00001 /*==========================================================================
00002  * Copyright (c) 2002-2005 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 // CombinedVocabularyIterator
00015 //
00016 // 20 January 2005 -- tds
00017 //
00018 
00019 #ifndef INDRI_COMBINEDVOCABULARYITERATOR_HPP
00020 #define INDRI_COMBINEDVOCABULARYITERATOR_HPP
00021 
00022 #include "indri/VocabularyIterator.hpp"
00023 #include "indri/DiskTermData.hpp"
00025 namespace indri {
00027   namespace index {
00028     class CombinedVocabularyIterator : public VocabularyIterator {
00029     private:
00030       VocabularyIterator* _first;
00031       VocabularyIterator* _second;
00032       int _secondBase;
00033       bool _finished;
00034       bool _usingSecond;
00035 
00036     public:
00037       CombinedVocabularyIterator( VocabularyIterator* first, VocabularyIterator* second, int secondBase );
00038       ~CombinedVocabularyIterator();
00039 
00040       void startIteration();
00041       bool nextEntry();
00042       bool nextEntry(const char *skipTo);
00043       DiskTermData* currentEntry();
00044       bool finished();
00045     };
00046   }
00047 }
00048 
00049 #endif // INDRI_COMBINEDVOCABULARYITERATOR_HPP
00050 

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