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/** @file msetpostlist.h
* @brief PostList returning entries from an MSet
*/
/* 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_MSETPOSTLIST_H
#define XAPIAN_INCLUDED_MSETPOSTLIST_H
#include "xapian/enquire.h"
#include "api/omenquireinternal.h"
#include "api/postlist.h"
/** PostList returning entries from an MSet.
*
* This class is used with the remote backend. We perform a match on the
* remote server, then serialise the resulting MSet and pass it back to the
* client where we include it in the match by wrapping it in an MSetPostList.
*/
class MSetPostList : public PostList {
/// Don't allow assignment.
void operator=(const MSetPostList &);
/// Don't allow copying.
MSetPostList(const MSetPostList &);
/// The MSet element that this PostList is pointing to.
int cursor;
/// The MSet::Internal object which we're returning entries from.
Xapian::Internal::intrusive_ptr<Xapian::MSet::Internal> mset_internal;
/** Is the sort order such the relevance decreases down the MSet?
*
* This is true for sort_by_relevance and sort_by_relevance_then_value.
*/
bool decreasing_relevance;
public:
MSetPostList(const Xapian::MSet mset, bool decreasing_relevance_)
: cursor(-1), mset_internal(mset.internal),
decreasing_relevance(decreasing_relevance_) { }
Xapian::doccount get_termfreq_min() const;
Xapian::doccount get_termfreq_est() const;
Xapian::doccount get_termfreq_max() const;
double get_maxweight() const;
Xapian::docid get_docid() const;
double get_weight() const;
const std::string * get_sort_key() const;
const std::string * get_collapse_key() const;
/// Not implemented for MSetPostList.
Xapian::termcount get_doclength() const;
Xapian::termcount get_unique_terms() const;
double recalc_maxweight();
PostList *next(double w_min);
/// Not meaningful for MSetPostList.
PostList *skip_to(Xapian::docid did, double w_min);
bool at_end() const;
std::string get_description() const;
};
#endif /* XAPIAN_INCLUDED_MSETPOSTLIST_H */
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