backends/quartz/quartz_termlist.h

Go to the documentation of this file.

/* quartz_termlist.h: Termlists in quartz databases
 *
 * Copyright 1999,2000,2001 BrightStation PLC
 * Copyright 2002 Ananova Ltd
 * Copyright 2002,2003,2004,2006,2007 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_QUARTZ_TERMLIST_H
#define OM_HGUARD_QUARTZ_TERMLIST_H

#include <string>

#include <xapian/types.h>
#include "termlist.h"
#include "btree.h"
#include "database.h"

using namespace std;

class QuartzTermListTable : public Btree {
    public:
        QuartzTermListTable(string path_, bool readonly_)
            : Btree(path_ + "/termlist_", readonly_) { }

        void set_entries(Xapian::docid did,
                    Xapian::TermIterator t, const Xapian::TermIterator &t_end,
                    quartz_doclen_t doclen, bool store_termfreqs);

        void delete_termlist(Xapian::docid did);
};

class QuartzTermList : public TermList {
    private:
        // Prevent copying
        QuartzTermList(const QuartzTermList &);
        QuartzTermList & operator=(const QuartzTermList &);

        Xapian::Internal::RefCntPtr<const Xapian::Database::Internal> this_db;

        Xapian::docid did;

        const Btree * table;

        string termlist_part;

        const char *pos;

        const char *end;

        bool have_finished;


        quartz_doclen_t doclen;

        Xapian::termcount termlist_size;

        string current_tname;

        Xapian::termcount current_wdf;

        bool has_termfreqs;

        mutable Xapian::doccount current_termfreq;

        Xapian::doccount doccount;

    public:
        QuartzTermList(Xapian::Internal::RefCntPtr<const Xapian::Database::Internal> this_db_,
                       const Btree * table_,
                       Xapian::docid did_,
                       Xapian::doccount doccount_);

        quartz_doclen_t get_doclength() const;

        Xapian::termcount get_approx_size() const;

        TermList * next();

        bool at_end() const;

        string get_termname() const;

        Xapian::termcount get_wdf() const;

        Xapian::doccount get_termfreq() const;

        void accumulate_stats(Xapian::Internal::ExpandStats & stats) const;

        Xapian::termcount positionlist_count() const;

        Xapian::PositionIterator positionlist_begin() const;
};

#endif /* OM_HGUARD_QUARTZ_TERMLIST_H */

---