#ifndef _fdet_Diaphragm_h_
#define _fdet_Diaphragm_h__

/**
   \file
   \brief Description of the diaphragm.

   \author L. Prado Jr 
   \version $Id: Diaphragm.h 17304 2010-07-09 09:36:19Z smueller $
   \date 27 Jan 2005
*/

#include <string>

namespace utl {
  class TabulatedFunction;
  class TimeStamp;
}


namespace fdet {

  class Telescope;

  /**
    \class Diaphragm
    \brief Description of the diaphragm.

    \author L. Prado Jr 
    \version $Id: Diaphragm.h 17304 2010-07-09 09:36:19Z smueller $
    \date 27 Jan 2005
    \ingroup fdet
  */

  class Diaphragm {

  public:
    unsigned int GetEyeId() const { return fEyeId; }
    unsigned int GetTelescopeId() const { return fTelescopeId; }

    /// Radius of the diaphragm
    double GetRadius() const;
    double GetArea() const;
    bool HasCorrectorRing() const;

    void Update();
    
  private:
    template<typename T> inline const T& GetDiaphragmData(T*& requestedData,
                                                          const std::string& property,
                                                          const std::string& component, 
                                                          const std::string& errorMsg) const;
    template<typename T> inline void GetDiaphragmData(T& requestedData,
                                                      const std::string& property,
                                                      const std::string& component,
                                                      const std::string& errorMsg) const;

  private:
    unsigned int fEyeId;
    unsigned int fTelescopeId;
    std::string fPhysicalEyeIdString;
    std::string fPhysicalTelescopeIdString;

    Diaphragm(const unsigned int eyeId, const unsigned int telId,
              const std::string& physEyeIdString,
              const std::string& physTelIdString);
    Diaphragm(const Diaphragm&);
    Diaphragm& operator=(const Diaphragm&);
    ~Diaphragm();

    // Quantity filled by lazy evaluation
    // ------------------------------------
    mutable double* fRadius;
    mutable double* fArea;
    mutable utl::TimeStamp* fCorrectorRingCommissionTime;

    friend class Telescope;
  };

}


#endif

// Configure (x)emacs for this file ...
// Local Variables:
// mode: c++
// compile-command: "make -C .. FDetector/Diaphragm.o -k"
// End: