Query.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      : 2005/12/27
00013 //
00014 #ifndef _QUERY_H
00015 #define _QUERY_H
00016 
00017 #include "Scorer.h"
00018 #include "Searcher.h"
00019 
00020 namespace firtex
00021 {
00022         namespace search
00023         {
00024                 class CSimilarity;              
00025                 class CWeight;
00026                 class CQuery
00027                 {
00028                 public:
00029                         CQuery(void);
00030                         virtual ~CQuery(void);
00031                 public:
00035                         float   getBoost(){return m_fBoost;}
00036                         void    setBoost(float fBoost){m_fBoost = fBoost;}
00037 
00043                         CWeight*        weight(CSearcher* pSearcher);
00044         
00049                         bool            instanceOf(const tchar* other);
00050 
00056                         CSimilarity*    getSimilarity(CSearcher* pSearcher);
00057 
00064                         virtual CQuery* optimize(firtex::index::CIndexReader* pReader);
00065                 public:
00070                         virtual CWeight*                createWeight(CSearcher* pSearcher);
00071 
00077                         virtual CScorer*                scorer(CSearcher* pSearcher);
00078 
00083                         virtual CQuery*                 clone()=0;
00084                                                 
00088                         virtual const tchar*    getQueryName() const = 0;
00089                 protected:
00090                         float m_fBoost;
00091                 };
00092         }
00093 }
00094 
00095 #endif