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/** @file chert_valuelist.h
* @brief Chert class for value streams.
*/
/* Copyright (C) 2007,2008,2011 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_VALUELIST_H
#define XAPIAN_INCLUDED_CHERT_VALUELIST_H
#include "backends/valuelist.h"
#include "chert_values.h"
class ChertCursor;
class ChertDatabase;
/// Chert class for value streams.
class ChertValueList : public Xapian::ValueIterator::Internal {
/// Don't allow assignment.
void operator=(const ChertValueList &);
/// Don't allow copying.
ChertValueList(const ChertValueList &);
ChertCursor * cursor;
ValueChunkReader reader;
Xapian::valueno slot;
Xapian::Internal::intrusive_ptr<const ChertDatabase> db;
/// Update @a reader to use the chunk currently pointed to by @a cursor.
bool update_reader();
public:
ChertValueList(Xapian::valueno slot_,
Xapian::Internal::intrusive_ptr<const ChertDatabase> db_)
: cursor(NULL), slot(slot_), db(db_) { }
~ChertValueList();
Xapian::docid get_docid() const;
Xapian::valueno get_valueno() const;
std::string get_value() 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_CHERT_VALUELIST_H
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