Delay.h

#ifndef CARMA_UTIL_DELAY_H
#define CARMA_UTIL_DELAY_H

#include <iostream>

namespace carma {
  namespace services {
    
    class Delay {
    public:
      
      Delay();
      
      virtual ~Delay();
      
      void setDelayInMeters(double delayInMeters) {
        nanoSeconds_ = delayInMeters / lightSpeed_ * nanoSecPerSec_;
      }

      void setDelayRateInMeters(double delayRateInMeters) {
        dNanoSeconds_ = delayRateInMeters / lightSpeed_ * nanoSecPerSec_;
      }

      void setDelayInNanoSeconds(double delayInNanoSec) {
        nanoSeconds_ = delayInNanoSec;
      }

      void setDelayRateInNanoSeconds(double delayRateInNanoSec) {
        dNanoSeconds_ = delayRateInNanoSec;
      }

      inline double meters() const {
        return nanoSeconds_ / nanoSecPerSec_ * lightSpeed_;
      }

      inline double metersPerSecond() const {
        return dNanoSeconds_ / nanoSecPerSec_ * lightSpeed_;
      }

      inline double nanoSeconds() const {
        return nanoSeconds_;
      }

      inline double nanoSecondsPerSecond() const {
        return dNanoSeconds_;
      }

      inline double secondsPerSecond() const {
        return dNanoSeconds_ / nanoSecPerSec_;
      }

      const Delay  operator+(const Delay& delay) const;
      Delay& operator+=(const Delay& delay);
      Delay& operator+=(const Delay delay);
      
      const Delay  operator-(const Delay& delay) const;
      Delay& operator-=(const Delay& delay);
      Delay& operator-=(const Delay delay);

      //      friend std::ostream& operator<<(std::ostream& os, Delay& delay);
      friend std::ostream& operator<<(std::ostream& os, Delay delay);

      inline void flipDelay() {
        nanoSeconds_ *= -1;
      }

      inline void flipRate() {
        dNanoSeconds_ *= -1;
      }

    private:

      static const double lightSpeed_    = 2.99792458e8;
      static const double nanoSecPerSec_ = 1e9;

      double nanoSeconds_;
      double dNanoSeconds_;

    }; // End class Delay
    std::ostream& operator<<(std::ostream& os, Delay delay);
  } // End namespace util
} // End namespace carma



#endif // End #ifndef CARMA_UTIL_DELAY_H