Searcher.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      : 2005/12/25
00013 //
00014 #ifndef __SEARCHER_H
00015 #define __SEARCHER_H
00016 
00017 #include "QueryHits.h"
00018 #include "Similarity.h"
00019 
00020 #include "../index/TermDocs.h"
00021 #include "../index/TermReader.h"
00022 #include "../index/NormBytes.h"
00023 using namespace firtex::index;
00024 using namespace firtex;
00025 
00026 namespace firtex
00027 {
00028         namespace search
00029         {               
00030                 
00031                 class CSearcher
00032                 {
00033                 public:
00034 
00035                         CSearcher(void)
00036                         {
00037                                 m_pSimilarity = CSimilarity::getDefault();//创建默认的Similarity 
00038                         }
00039 
00040                         virtual ~CSearcher(void)
00041                         {                               
00042                                 
00043                                 m_pSimilarity = NULL;
00044                         }
00045                 public:
00052                         virtual CQueryHits*             search(CQuery* pQuery,int nDocs) = 0;
00053 
00060                         virtual CQuery*                 optimizeQuery(CQuery* pOrgQuery) = 0;
00061 
00066                         virtual CTermReader*    termReader()const=0;
00067 
00073                         virtual freq_t                  docFreq(CTerm* pTerm)=0;
00074 
00080                         virtual CNormBytes*             norms(const tchar* field) = 0;
00081 
00086                         virtual count_t                 maxDocs()=0;
00087 
00093                         virtual document::CDocument*            doc(docid_t docID)=0;
00094 
00095                         CSimilarity*    getSimilarity()
00096                         {
00097                                 return m_pSimilarity;
00098                         }
00099                         void                    setSimilarity(CSimilarity* pSimilarity)
00100                         {                               
00101                                 m_pSimilarity = pSimilarity;
00102                         }
00103 
00104                 protected:
00105                         CSimilarity*    m_pSimilarity;
00106                 };
00107         }
00108 
00109 }
00110 
00111 
00112 #endif