ConformableQuantity.h

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// $Id: ConformableQuantity.h,v 1.7 2005/06/06 20:37:52 mpound Exp $

#ifndef CARMA_SERVICES_CONFORMABLEQUANTITY_H
#define CARMA_SERVICES_CONFORMABLEQUANTITY_H

#include "carma/services/Units.h"
#include <iostream>
#include <string>

namespace carma  {
  namespace services {
      class ConformableQuantity {
        public:

            explicit ConformableQuantity(double value, 
                                         const std::string& units);

            virtual ~ConformableQuantity();
            
            virtual double convert(const std::string& convertTo) const;

            double getValue() const 
            {
                return value_;
            } 

            virtual std::string getUnits() const;

            virtual const ConformableQuantity 
                operator+(const ConformableQuantity& quantity) const;

            virtual const ConformableQuantity 
                operator-(const ConformableQuantity& quantity) const;

            virtual ConformableQuantity& 
                operator+=(const ConformableQuantity& quantity);

            virtual ConformableQuantity& 
                operator-=(const ConformableQuantity& quantity);

            virtual void reset(double value, const std::string& units);

        protected:
            Units u_;  

        private:

            double value_; 

            std::string units_;

      };

std::ostream& operator<<(std::ostream& os, 
                         ConformableQuantity& quantity);

  } // namespace services
} // namespace carma

#endif //CARMA_SERVICES_CONFORMABLEQUANTITY_H