chert_alltermslist.h

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/* Copyright (C) 2005,2007,2008,2009,2010,2011 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 XAPIAN_INCLUDED_CHERT_ALLTERMSLIST_H
#define XAPIAN_INCLUDED_CHERT_ALLTERMSLIST_H

#include "backends/alltermslist.h"
#include "chert_database.h"
#include "chert_postlist.h"

class ChertCursor;

class ChertAllTermsList : public AllTermsList {
    ChertAllTermsList(const ChertAllTermsList &);

    void operator=(const ChertAllTermsList &);

    Xapian::Internal::intrusive_ptr<const ChertDatabase> database;

    ChertCursor * cursor;

    std::string current_term;

    std::string prefix;

    mutable Xapian::doccount termfreq;

    void read_termfreq() const;

  public:
    ChertAllTermsList(Xapian::Internal::intrusive_ptr<const ChertDatabase> database_,
                      const std::string & prefix_)
        : database(database_), cursor(NULL), prefix(prefix_), termfreq(0) { }

    ~ChertAllTermsList();

    std::string get_termname() const;

    Xapian::doccount get_termfreq() const;

    TermList * next();

    TermList * skip_to(const std::string &tname);

    bool at_end() const;
};

#endif /* XAPIAN_INCLUDED_CHERT_ALLTERMSLIST_H */