weightedDocument.hpp

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/*
 * Copyright (c) 2014 Patrick P. Frey
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
#ifndef _STRUS_WEIGHTED_DOCUMENT_HPP_INCLUDED
#define _STRUS_WEIGHTED_DOCUMENT_HPP_INCLUDED
#include "strus/index.hpp"
#include <utility>
#include <cmath>
#include <limits>

namespace strus {

class WeightedDocument
{
public:
        WeightedDocument()
                :m_docno(0),m_weight(0.0){}
        WeightedDocument( const WeightedDocument& o)
                :m_docno(o.m_docno),m_weight(o.m_weight){}
        WeightedDocument( const Index& docno_, double weight_)
                :m_docno(docno_),m_weight(weight_){}

        Index docno() const                                     {return m_docno;}
        double weight() const                                   {return m_weight;}

        bool operator < ( const WeightedDocument& o) const
        {
                double diff = m_weight - o.m_weight;
                if (fabs( diff) < std::numeric_limits<double>::epsilon())
                {
                        return m_docno < o.m_docno;
                }
                else
                {
                        return (diff < 0.0);
                }
        }
        bool operator > ( const WeightedDocument& o) const
        {
                double diff = m_weight - o.m_weight;
                if (fabs( diff) < std::numeric_limits<double>::epsilon())
                {
                        return m_docno > o.m_docno;
                }
                else
                {
                        return (diff > 0.0);
                }
        }

private:
        Index m_docno;                  
        double m_weight;                
};

}//namespace
#endif