TermReader.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      : 2005/12/27
00013 //
00014 #ifndef __TERMSEARCHER_H
00015 #define __TERMSEARCHER_H
00016 #include "../utility/StdHeader.h"
00017 #include "Term.h"
00018 #include "TermDocs.h"
00019 #include "TermPositions.h"
00020 #include "TermInfo.h"
00021 #include "TermIterator.h"
00022 #include "../store/Directory.h"
00023 #include "../utility/BitVector.h"
00024 #include "FieldsInfo.h"
00025 #include <string>
00026 using namespace firtex::store;
00027 using namespace firtex::utility;
00028 using namespace std;
00029 
00030 namespace firtex
00031 {
00032         namespace index
00033         {
00034                 class CTermReader
00035                 {
00036                 public:
00037 
00038                         CTermReader(void)
00039                         {
00040                         }
00041 
00042                         virtual ~CTermReader(void)
00043                         {
00044                         }
00045                 public:
00053                         virtual void                    open(CDirectory* pDirectory,const tchar* barrelname,CFieldInfo* pFieldInfo,CBitVector* deletedDocs)=0;
00054 
00062                         virtual CTermIterator*  termIterator(CTerm* pLowerTerm,CTerm* pUpperTerm) = 0;                  
00063 
00070                         virtual CTermIterator*  termIterator(const tchar* field) = 0;
00071 
00076                         virtual bool                    seek(CTerm* term)=0;
00077 
00082                         virtual CTermDocs*              termDocs() = 0;
00083 
00088                         virtual CTermPositions* termPositions()=0;
00089 
00094                         virtual freq_t                  docFreq(CTerm* term) = 0;
00095 
00100                         virtual CTermInfo*              termInfo(CTerm* term){return NULL;};
00101 
00105                         virtual void                    close()=0;
00106                 };
00107         }
00108 }
00109 
00110 
00111 #endif