FieldIndexer.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      : 2005/12/10
00013 //
00014 #ifndef _FIELDINDEXER_H
00015 #define _FIELDINDEXER_H
00016 
00017 #include "../utility/StdHeader.h"
00018 #include "../document/Field.h"
00019 #include "../store/IndexOutput.h"
00020 
00021 using namespace firtex;
00022 using namespace firtex::store;
00023 using namespace firtex::document;
00024 
00025 namespace firtex
00026 {
00027         namespace index
00028         {
00029                 class CIndexOutputDescriptor
00030                 {
00031                 public:
00032                         CIndexOutputDescriptor(){}
00033                         virtual ~CIndexOutputDescriptor(){}
00034                 public:
00035                         CIndexOutput* tdiWriter;
00036             CIndexOutput* dfiWriter;
00037                         CIndexOutput* ptiWriter;
00038 
00039                         friend class CFieldIndexer;
00040                 };
00041 
00042                 class CFieldIndexer
00043                 {
00044                 public:
00045 
00046                         CFieldIndexer(void)
00047                         {
00048                         }
00049 
00050                         virtual ~CFieldIndexer(void)
00051                         {
00052                         }
00053                 public:         
00059                         virtual void                    addField(docid_t did,CField* pField) = 0;
00060                         
00067                         virtual void                    write(CIndexOutputDescriptor* pWriterDesc) = 0;
00068                         
00073                         virtual void                    setFilePointer(fileoffset_t off) = 0;
00074 
00078                         virtual fileoffset_t    getFilePointer() = 0;
00079 
00083                         virtual uint64_t                distinctNumTerms() = 0;
00084                 };
00085         }
00086 }
00087 
00088 #endif