chert_modifiedpostlist.h

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/* Copyright (C) 2006,2007,2008,2009,2011,2015 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_MODIFIEDPOSTLIST_H
#define XAPIAN_INCLUDED_CHERT_MODIFIEDPOSTLIST_H

#include <map>
#include <string>

using namespace std;

#include "chert_database.h"
#include "chert_postlist.h"

class ChertModifiedPostList : public ChertPostList {

    map<Xapian::docid, pair<char, Xapian::termcount> > mods;
    map<Xapian::docid, pair<char, Xapian::termcount> >::const_iterator it;

    PositionList * poslist;

    void skip_deletes(double w_min);

  public:
    ChertModifiedPostList(Xapian::Internal::intrusive_ptr<const ChertDatabase> this_db_,
                          const string & term_,
                          const map<Xapian::docid, pair<char, Xapian::termcount> > & mods_,
                          Xapian::termcount wdf_upper_bound_)
        : ChertPostList(this_db_, term_, true),
          mods(mods_), it(mods.begin()), poslist(0)
    {
        ChertPostList::wdf_upper_bound = wdf_upper_bound_;
    }

    ~ChertModifiedPostList();

    Xapian::doccount get_termfreq() const;

    Xapian::docid get_docid() const;

    Xapian::termcount get_doclength() const;

    Xapian::termcount get_unique_terms() const;

    Xapian::termcount get_wdf() const;

    PositionList *read_position_list();

    PositionList *open_position_list() const;

    PostList * next(double w_min);

    PostList * skip_to(Xapian::docid desired_did, double w_min);

    bool at_end() const;

    std::string get_description() const;
};

#endif // XAPIAN_INCLUDED_CHERT_MODIFIEDPOSTLIST_H