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//
// 080718 Add ClearHistories() method by T. Koi
//
// P. Arce, June-2014 Conversion neutron_hp to particle_hp
//
#ifndef G4VParticleHPEnergyAngular_h
#define G4VParticleHPEnergyAngular_h 1

#include <fstream>

#include "G4ios.hh"
#include "globals.hh"
#include "G4ReactionProduct.hh"
#include "G4Cache.hh"

class G4VParticleHPEnergyAngular
{

   struct toBeCached
   {
      G4ReactionProduct* theProjectileRP;
      G4ReactionProduct* theTarget;
      G4ReactionProduct* theCMS;
      toBeCached() : theProjectileRP(0),theTarget(0),theCMS(0) {};
   };

public:
  
  G4VParticleHPEnergyAngular()
  {
    theQValue=0;
    toBeCached val;
    fCache.Put( val );
  }

  virtual ~G4VParticleHPEnergyAngular()
  {
  }
  
public:
  
  virtual void Init(std::istream & aDataFile) = 0;
  virtual G4ReactionProduct * Sample(G4double anEnergy, 
                                     G4double massCode, 
                                     G4double mass) = 0;
  virtual G4double MeanEnergyOfThisInteraction() = 0;
    // returns value cashed in sample
  
  void SetProjectileRP(G4ReactionProduct * aIncidentParticleRP) 
  { 
    fCache.Get().theProjectileRP = aIncidentParticleRP;
  }
  
  void SetTarget(G4ReactionProduct * aTarget)
  { 
    fCache.Get().theTarget = aTarget; 
  }
  
  G4ReactionProduct * GetTarget()
  {
    return fCache.Get().theTarget;
  }
  
  G4ReactionProduct * GetProjectileRP()
  {
    return fCache.Get().theProjectileRP;
  }
  
  G4ReactionProduct * GetCMS()
  { 
     *fCache.Get().theCMS = *fCache.Get().theProjectileRP
                          + *fCache.Get().theTarget;
     return fCache.Get().theCMS;
  }

  inline void SetQValue(G4double aValue)
  {
    theQValue = aValue;
  }

  virtual void ClearHistories()
  {
  }
  
protected:
  
  inline G4double GetQValue() { return theQValue; }
  
private:
  
  G4double theQValue;
    
  G4Cache<toBeCached> fCache;
};
#endif