esetinternal.h

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/* Copyright (C) 2008,2010,2011 Olly Betts
 * Copyright (C) 2011 Action Without Borders
 *
 * 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_ESETINTERNAL_H
#define XAPIAN_INCLUDED_ESETINTERNAL_H

#include "xapian/intrusive_ptr.h"
#include "xapian/enquire.h"
#include "xapian/eset.h"
#include "xapian/types.h"

#include <algorithm>
#include <string>
#include <vector>

namespace Xapian {
    class Database;
    class ExpandDecider;

    namespace Internal {
        class ExpandWeight;

class ExpandTerm {
    friend class Xapian::ESetIterator;
    friend class Xapian::ESet::Internal;

    double wt;

    std::string term;

  public:
    ExpandTerm(double wt_, const std::string & term_)
        : wt(wt_), term(term_) { }

    void swap(ExpandTerm & o) {
        std::swap(wt, o.wt);
        std::swap(term, o.term);
    }

    bool operator<(const ExpandTerm & o) const {
        if (wt > o.wt) return true;
        if (wt < o.wt) return false;
        return term > o.term;
    }

    std::string get_description() const;
};

}

class ESet::Internal : public Xapian::Internal::intrusive_base {
    friend class ESet;
    friend class ESetIterator;

    Xapian::termcount ebound;

    std::vector<Xapian::Internal::ExpandTerm> items;

    void operator=(const Internal &);

    Internal(const Internal &);

  public:
    Internal() : ebound(0) { }

    void expand(Xapian::termcount max_esize,
                const Xapian::Database & db,
                const Xapian::RSet & rset,
                const Xapian::ExpandDecider * edecider,
                Xapian::Internal::ExpandWeight & eweight,
                double min_wt);

    std::string get_description() const;
};

}

#endif // XAPIAN_INCLUDED_ESETINTERNAL_H