net_postlist.h

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/* Copyright (C) 2007,2009 Lemur Consulting Ltd
 * Copyright (C) 2007,2008,2009,2011,2019,2024 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, see
 * <https://www.gnu.org/licenses/>.
 */
 
#ifndef XAPIAN_INCLUDED_NET_POSTLIST_H
#define XAPIAN_INCLUDED_NET_POSTLIST_H
 
#include <string>
 
#include "backends/leafpostlist.h"
#include "omassert.h"
#include "remote-database.h"
 
#include <string_view>
 
class NetworkPostList : public LeafPostList {
    friend class RemoteDatabase;
 
    Xapian::Internal::intrusive_ptr<const RemoteDatabase> db;
 
    std::string postings;
    bool started = false;
    const char* pos = NULL;
    const char* pos_end = NULL;
 
    Xapian::docid lastdocid = 0;
    Xapian::termcount lastwdf = 0;
 
  public:
    NetworkPostList(Xapian::Internal::intrusive_ptr<const RemoteDatabase> db_,
                    std::string_view term_,
                    Xapian::doccount termfreq_,
                    std::string&& postings_)
        : LeafPostList(term_), db(db_), postings(std::move(postings_)) {
        termfreq = termfreq_;
        // collfreq is only used during the match and remote shards are handled
        // by running the match on the remote.
    }
 
    Xapian::docid get_docid() const;
 
    Xapian::termcount get_wdf() const;
 
    PositionList * open_position_list() const;
 
    PostList * next(double);
 
    PostList * skip_to(Xapian::docid did, double weight);
 
    bool at_end() const;
 
    Xapian::termcount get_wdf_upper_bound() const;
 
    std::string get_description() const;
};
 
#endif /* XAPIAN_INCLUDED_NET_POSTLIST_H */