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TimeWeightedAverage.hpp

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 * This file is part of openWNS (open Wireless Network Simulator)
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 * terms of the GNU Lesser General Public License version 2 as published by the
 * Free Software Foundation;
 *
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 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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#ifndef WNS_TIMEWEIGHTEDAVERAGE_HPP
#define WNS_TIMEWEIGHTEDAVERAGE_HPP

#include <WNS/Exception.hpp>
#include <WNS/WeightedAverage.hpp>

namespace wns {
    template <typename T,
          typename Clock>
    class TimeWeightedAverage
        : public WeightedAverage<T>
    {
    public:
        TimeWeightedAverage()
            : WeightedAverage<T>(),
              lastTime(0.0),
              c(NULL)
        {};

        TimeWeightedAverage(Clock* _c)
            : WeightedAverage<T>(),
              lastTime(0.0),
              c(_c)
        {};

        void setClock(Clock* _c)
        {
            c=_c;
        }

        virtual void reset()
        {
            assert(c);
            lastTime = c->getTime();
            WeightedAverage<T>::reset();
        };

        virtual void put(const T&, double)
        {
            throw(Exception("This method should not be used!"));
        }

        virtual void put(const T& t)
        {
            assert(c);
            double newTime = c->getTime();
            double weight = newTime - lastTime;
            WeightedAverage<T>::put(t, weight);
            lastTime = newTime;
        };

    private:
        double lastTime;

        Clock* c;
    };
}

#endif // WNS_TIMEWEIGHTEDAVERAGE_HPP

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