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/** @file slowvaluelist.h
* @brief Slow implementation for backends which don't streamed values.
*/
/* Copyright (C) 2007,2008,2011,2014 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_SLOWVALUELIST_H
#define XAPIAN_INCLUDED_SLOWVALUELIST_H
#include "valuelist.h"
#include "database.h"
/** Slow implementation for backends which don't streamed values.
*
* Used by inmemory and remote backends.
*/
class SlowValueList : public ValueList {
/// Don't allow assignment.
void operator=(const SlowValueList &);
/// Don't allow copying.
SlowValueList(const SlowValueList &);
/// The subdatabase.
Xapian::Internal::intrusive_ptr<const Xapian::Database::Internal> db;
/// The last docid in the database, or 0 if we're at_end.
Xapian::docid last_docid;
/// The value slot we're iterating over.
Xapian::valueno slot;
/// The value at the current position.
std::string current_value;
/// The document id at the current position.
Xapian::docid current_did;
public:
SlowValueList(const Xapian::Database::Internal * db_, Xapian::valueno slot_)
: db(db_), last_docid(db_->get_lastdocid()), slot(slot_), current_did(0)
{ }
Xapian::docid get_docid() const;
std::string get_value() const;
Xapian::valueno get_valueno() const;
bool at_end() const;
void next();
void skip_to(Xapian::docid);
bool check(Xapian::docid did);
std::string get_description() const;
};
#endif // XAPIAN_INCLUDED_SLOWVALUELIST_H
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