common/multimatch.h

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/* multimatch.h: class for performing a match
 *
 * Copyright 1999,2000,2001 BrightStation PLC
 * Copyright 2002,2003,2004,2005,2006,2007 Olly Betts
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
 * USA
 */

#ifndef OM_HGUARD_MULTIMATCH_H
#define OM_HGUARD_MULTIMATCH_H

#include "omqueryinternal.h"
#include "submatch.h"

#include <vector>
#include <map>

// Forward declaration.
class Stats;

class MultiMatch
{
    private:
        std::vector<Xapian::Internal::RefCntPtr<SubMatch> > leaves;

        const Xapian::Database db;

        const Xapian::Query::Internal *query;

        Xapian::valueno collapse_key;

        int percent_cutoff;

        Xapian::weight weight_cutoff;

        Xapian::Enquire::docid_order order;

        Xapian::valueno sort_key;

        Xapian::Enquire::Internal::sort_setting sort_by;

        bool sort_value_forward;

        const Xapian::Sorter * sorter;

        Xapian::ErrorHandler * errorhandler;

        const Xapian::Weight * weight;

        bool recalculate_w_max;

        vector<bool> is_remote;

        string get_collapse_key(PostList *pl,
                                Xapian::docid did, Xapian::valueno keyno,
                                Xapian::Internal::RefCntPtr<Xapian::Document::Internal> &doc);

        Xapian::weight getorrecalc_maxweight(PostList *pl);

        MultiMatch(const MultiMatch &);

        void operator=(const MultiMatch &);

    public:
        MultiMatch(const Xapian::Database &db_,
                   const Xapian::Query::Internal * query,
                   Xapian::termcount qlen,
                   const Xapian::RSet * omrset,
                   Xapian::valueno collapse_key_,
                   int percent_cutoff_,
                   Xapian::weight weight_cutoff_,
                   Xapian::Enquire::docid_order order_,
                   Xapian::valueno sort_key_,
                   Xapian::Enquire::Internal::sort_setting sort_by_,
                   bool sort_value_forward_,
                   const Xapian::Sorter * sorter_,
                   Xapian::ErrorHandler * errorhandler,
                   Stats & stats,
                   const Xapian::Weight *wtscheme);

        void get_mset(Xapian::doccount first,
                      Xapian::doccount maxitems,
                      Xapian::doccount check_at_least,
                      Xapian::MSet & mset,
                      const Stats & stats,
                      const Xapian::MatchDecider * mdecider,
                      const Xapian::MatchDecider * matchspy);

        void recalc_maxweight();
};

#endif /* OM_HGUARD_MULTIMATCH_H */

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