ConjunctionScorer.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      : 2006/5/9
00013 //
00014 #ifndef _CONJUNCTIONSCORER_H
00015 #define _CONJUNCTIONSCORER_H
00016 
00017 #include <list>
00018 #include "Scorer.h"
00019 using namespace std;
00020 
00021 namespace firtex
00022 {
00023         namespace search
00024         {               
00025                 class CConjunctionScorer :public CScorer
00026                 {
00027 #define CONJUNCTION_PAGESIZE            1024
00028                         typedef list<CScorer*> ScorerList;
00029                 public:
00030                         CConjunctionScorer(CSimilarity* pSimilarity);
00031                         CConjunctionScorer(list<CScorer*>* scorers,CSimilarity* pSimilarity);
00032                         virtual ~CConjunctionScorer(void);
00033 
00034                 public:
00039                         count_t nextDocs();
00040 
00047                         count_t scores(docid_t*& docs,score_t*& scores);
00048 
00056                         bool    skipTo(docid_t target,docid_t& nearTarget);
00057 
00062                         bool    next();
00063 
00064                         /*
00065                          * 返回当前位置文档的打分结果，必须配合{@link skipTo(docid_t,DOC_ID)}或{@link next()}使用，只有返回true后才有效
00066                          */
00067                         score_t score();
00068 
00069                         /*
00070                          * 返回当前位置文档ID，必须配合{@link skipTo(docid_t,DOC_ID)}或{@link next()}使用，只有返回true后才有效
00071                          */
00072                         docid_t doc();
00073         
00074                         /*
00075                          * add one scorer
00076                          * @param pScorer The scorer witch will be added to the m_scoresList
00077                          */
00078                         void    add(CScorer* pScorer){m_scoresList.push_back(pScorer);}
00079                 protected:
00080                         ScorerList      m_scoresList;
00081 
00082                         docid_t         m_docs[CONJUNCTION_PAGESIZE];   //文档ID，内存由CTermDocs维护                   
00083                         score_t         m_scores[CONJUNCTION_PAGESIZE]; //打分结果
00084                         count_t         m_numDocs;              //文档数                        
00085                 };
00086         }
00087 }
00088 
00089 #endif