chert_termlist.h

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/* Copyright (C) 2007,2008,2010,2011 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_TERMLIST_H
#define XAPIAN_INCLUDED_CHERT_TERMLIST_H

#include <string>

#include "xapian/intrusive_ptr.h"
#include <xapian/positioniterator.h>
#include <xapian/types.h>

namespace Xapian {
    namespace Internal {
        class ExpandStats;
    }
}

#include "chert_database.h"
#include "api/termlist.h"
#include "chert_table.h"

class ChertTermList : public TermList {
    void operator=(const ChertTermList &);

    ChertTermList(const ChertTermList &);

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

    Xapian::docid did;

    chert_doclen_t doclen;

    Xapian::termcount termlist_size;

    std::string data;

    const char *pos;

    const char *end;

    std::string current_term;

    Xapian::termcount current_wdf;

    mutable Xapian::doccount current_termfreq;

  public:
    ChertTermList(Xapian::Internal::intrusive_ptr<const ChertDatabase> db_,
                  Xapian::docid did_);

    chert_doclen_t get_doclength() const;

    Xapian::termcount get_approx_size() const;

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

    std::string get_termname() const;

    Xapian::termcount get_wdf() const;

    Xapian::doccount get_termfreq() const;

    TermList * next();

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

    bool at_end() const;

    Xapian::termcount positionlist_count() const;

    Xapian::PositionIterator positionlist_begin() const;
};

#endif // XAPIAN_INCLUDED_CHERT_TERMLIST_H