TermFreqVector.h

00001 //
00002 // Copyright(C) 2005--2006 Institute of Computing Tech, Chinese Academy of Sciences. 
00003 // All rights reserved.
00004 // This file is part of FirteX (www.firtex.org)
00005 //
00006 // Use of the FirteX is subject to the terms of the software license set forth in 
00007 // the LICENSE file included with this software, and also available at
00008 // http://www.firtex.org/license.html
00009 //
00010 // Author       : 郭瑞杰(GuoRuijie)
00011 // Email        : ruijieguo@software.ict.ac.cn
00012 // Created      : 2006/7/3
00013 //
00014 #ifndef _TERMFREQVECTOR_H
00015 #define _TERMFREQVECTOR_H
00016 
00017 #include "../utility/StdHeader.h"
00018 #include "../utility/FXString.h"
00019 #include "../store/IndexOutput.h"
00020 #include "../store/IndexInput.h"
00021 #include "../document/Field.h"
00022 #include "Term.h"
00023 
00024 #if _MSC_VER > 1000
00025 #pragma once
00026 #endif // _MSC_VER > 1000
00027 
00028 using namespace firtex::utility;
00029 using namespace firtex::document;
00030 using namespace firtex::store;
00031 
00032 namespace firtex
00033 {
00034         namespace index
00035         {
00036                 class CTermFreqVector
00037                 {
00038                 public:
00039 
00040                         CTermFreqVector(void)
00041                         {
00042                         }
00043                         CTermFreqVector(const tchar* field) : m_field(field)
00044                         {
00045                         }
00046 
00047                         virtual ~CTermFreqVector(void)
00048                         {
00049                         }
00050                 public:
00056                         virtual void    open(const tchar* field,CIndexInput* pInput) = 0;
00060                         virtual const tchar*    getField(){return m_field.c_str();}
00061 
00065             virtual     count_t                 numTerms() = 0;
00066 
00070             virtual     count_t                 numDistinctTerms() = 0;
00071 
00077                         virtual const CTerm*    getTerms() = 0;
00078 
00084                         virtual const termid_t* getTermIDs() = 0;
00085 
00091                         virtual const freq_t*   getTermFrequencies() = 0;
00092 
00096                         virtual void                    getTermFreqVector(termid_t*& tids,freq_t*& freqs,count_t& size) = 0;
00097 
00103                         virtual int                             indexOf(termid_t tid) = 0;
00104                 protected:
00110                         virtual void    addField(CIndexOutput*  pOutput,CField* pField) = 0;
00111                 protected:
00112                         CFXString       m_field;
00113 
00114                         friend class CTermVectorWriter;
00115                 };
00116         }
00117 }
00118 
00119 #endif