ortermlist.h

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/* Copyright (C) 2007,2010 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_ORTERMLIST_H
#define XAPIAN_INCLUDED_ORTERMLIST_H
 
#include "api/termlist.h"
 
namespace Xapian {
namespace Internal {
class ExpandStats;
}
}
 
class OrTermList : public TermList {
  protected:
    TermList *left, *right;
 
    std::string left_current, right_current;
 
    void check_started() const;
 
  public:
    OrTermList(TermList * left_, TermList * right_)
        : left(left_), right(right_) { }
 
    ~OrTermList();
 
    Xapian::termcount get_approx_size() const;
 
    void accumulate_stats(Xapian::Internal::ExpandStats & stats) const;
 
    std::string get_termname() const;
 
    Xapian::termcount get_wdf() const;
 
    Xapian::doccount get_termfreq() const;
 
    TermList *next();
 
    TermList * skip_to(const std::string & term);
 
    bool at_end() const;
 
    Xapian::termcount positionlist_count() const;
 
    Xapian::PositionIterator positionlist_begin() const;
};
 
class FreqAdderOrTermList : public OrTermList {
  public:
    FreqAdderOrTermList(TermList * left_, TermList * right_)
            : OrTermList(left_, right_)
    { }
 
    Xapian::doccount get_termfreq() const;
};
 
#endif // XAPIAN_INCLUDED_ORTERMLIST_H