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DiskDocumentDataIterator.hpp

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00001 /*==========================================================================
00002  * Copyright (c) 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 // DiskDocumentDataIterator
00014 //
00015 // 21 January 2005 -- tds
00016 //
00017 
00018 #ifndef INDRI_DISKDOCUMENTDATAITERATOR_HPP
00019 #define INDRI_DISKDOCUMENTDATAITERATOR_HPP
00020 
00021 #include "indri/File.hpp"
00022 #include "indri/SequentialReadBuffer.hpp"
00023 #include "indri/DocumentDataIterator.hpp"
00024 #include "indri/DocumentData.hpp"
00025 
00026 namespace indri {
00027   namespace index {
00028     class DiskDocumentDataIterator : public DocumentDataIterator {
00029     private:
00030       indri::file::SequentialReadBuffer* _readBuffer;
00031       UINT64 _fileSize;
00032 
00033       DocumentData _documentData;
00034       indri::file::File& _documentDataFile;
00035       bool _finished;
00036 
00037     public:
00038       DiskDocumentDataIterator( indri::file::File& documentDataFile );
00039       ~DiskDocumentDataIterator();
00040 
00041       void startIteration();
00042       bool nextEntry();
00043       const DocumentData* currentEntry();
00044       bool finished();
00045     };
00046   }
00047 }
00048 
00049 #endif // INDRI_DISKDOCUMENTDATAITERATOR_HPP
00050 

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