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/** @file chert_modifiedpostlist.h
* @brief A ChertPostList plus pending modifications
*/
/* 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 {
/// Modifications to apply to the ChertPostList.
//@{
map<Xapian::docid, pair<char, Xapian::termcount> > mods;
map<Xapian::docid, pair<char, Xapian::termcount> >::const_iterator it;
//@}
/// Pointer to PositionList returned from read_position_list to be deleted.
PositionList * poslist;
/// Skip over deleted documents after a next() or skip_to().
void skip_deletes(double w_min);
public:
/// Constructor.
ChertModifiedPostList(Xapian::Internal::intrusive_ptr<const ChertDatabase> this_db_,
const string & term_,
const map<Xapian::docid, pair<char, Xapian::termcount> > & mods_)
: ChertPostList(this_db_, term_, true),
mods(mods_), it(mods.begin()), poslist(0)
{ }
~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
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