matcher/andpostlist.h

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00001 /* andpostlist.h: Return only items which are in both sublists
00002  *
00003  * ----START-LICENCE----
00004  * Copyright 1999,2000,2001 BrightStation PLC
00005  * Copyright 2002 Ananova Ltd
00006  * Copyright 2003,2004 Olly Betts
00007  *
00008  * This program is free software; you can redistribute it and/or
00009  * modify it under the terms of the GNU General Public License as
00010  * published by the Free Software Foundation; either version 2 of the
00011  * License, or (at your option) any later version.
00012  *
00013  * This program is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  * GNU General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU General Public License
00019  * along with this program; if not, write to the Free Software
00020  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00021  * USA
00022  * -----END-LICENCE-----
00023  */
00024 
00025 #ifndef OM_HGUARD_ANDPOSTLIST_H
00026 #define OM_HGUARD_ANDPOSTLIST_H
00027 
00028 #include "branchpostlist.h"
00029 
00036 class AndPostList : public BranchPostList {
00037     protected:
00038         Xapian::docid head;
00039         Xapian::weight lmax, rmax;
00040     private:
00041         Xapian::doccount dbsize;
00042 
00043         void process_next_or_skip_to(Xapian::weight w_min, PostList *ret);
00044     public:
00045         Xapian::doccount get_termfreq_max() const;
00046         Xapian::doccount get_termfreq_min() const;
00047         Xapian::doccount get_termfreq_est() const;
00048 
00049         Xapian::docid  get_docid() const;
00050         Xapian::weight get_weight() const;
00051         Xapian::weight get_maxweight() const;
00052 
00053         Xapian::weight recalc_maxweight();
00054 
00055         PostList *next(Xapian::weight w_min);
00056         PostList *skip_to(Xapian::docid did, Xapian::weight w_min);
00057         bool   at_end() const;
00058 
00059         std::string get_description() const;
00060 
00069         virtual Xapian::doclength get_doclength() const;
00070 
00071         AndPostList(PostList *left,
00072                     PostList *right,
00073                     MultiMatch *matcher_,
00074                     Xapian::doccount dbsize_,
00075                     bool replacement = false);
00076 };
00077 
00078 #endif /* OM_HGUARD_ANDPOSTLIST_H */

Documentation for Xapian (version 1.0.10).
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