TermQuery.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,ruijieguo@gmail.com
00012 // Created      : 2005/12/28
00013 //
00014 #ifndef _TERMQUERY_H
00015 #define _TERMQUERY_H
00016 
00017 #include "Weight.h"
00018 #include "Query.h"
00019 #include "TermScorer.h"
00020 #include "IndexSearcher.h"
00021 #include "../index/Term.h"
00022 
00023 using namespace firtex::index;
00024 
00025 namespace firtex
00026 {
00027         namespace search
00028         {
00029                 class CTermQuery :      public CQuery
00030                 {
00031                         class CTermWeight:public CWeight
00032                         {
00033                         public:
00034                                 CTermWeight(CSearcher* pSearcher,CTermQuery* pTermQuery,CTerm* pTerm);                          
00035                                 virtual ~CTermWeight();
00036                         public:
00037                                 weight_t        squaredWeight();
00038                                 weight_t        getValue();
00039                                 void            normalize(float fQueryNorm);
00040                         protected:
00041                                 CTerm*                  m_pTerm;                                
00042                                 CSearcher*              m_pSearcher;
00043 
00044                                 weight_t                m_fWeight;
00045                                 score_t                 m_idf;
00046                         };
00047                 public:                 
00048                         CTermQuery(CTerm* t);
00049                         CTermQuery(const CTermQuery& t);
00050                         CTermQuery(void);
00051                         virtual ~CTermQuery(void);
00052                 public:
00053                         const CTerm*    term(){return m_pTerm;}
00054 
00060                         CScorer*        scorer(CSearcher* pSearcher);                   
00061 
00066                         CQuery*         clone();
00067 
00068                         static const tchar* getClassName(){return _T("TermQuery");}
00069 
00073                         const tchar* getQueryName() const{return getClassName();}
00074                 protected:
00075                         CWeight*        createWeight(CSearcher* pSearcher);
00076                 protected:
00077                         CTerm*                  m_pTerm;
00078                 };
00079         }
00080 }
00081 
00082 #endif