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// $Id$
//
//---------------------------------------------------------------------
//
// GEANT4 Class header file
//
// File name:     G4HadronStoppingProcess
//
// Author V.Ivanchenko 21 April 2012 on base of G4MuonMinusCaptureAtRest
//
//
// Class Description:
//
// Base process class for nuclear capture of negatively charged particles
//
// Modifications: 
//  20120928  M. Kelsey -- Add GetMeanLifeTime() here, instead of in base.
//  20121004  K. Genser -- defined two argument constructor with defaults
//  20121016  K. Genser -- Reverting to use one argument c'tor
//
//------------------------------------------------------------------------

#ifndef G4HadronStoppingProcess_h
#define G4HadronStoppingProcess_h 1
 
#include "globals.hh"
#include "G4HadronicProcess.hh"
#include "G4ParticleDefinition.hh"
#include "G4ElementSelector.hh"
#include "G4HadronicInteraction.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4ForceCondition.hh"
#include "G4HadronicProcessType.hh"
#include "G4HadFinalState.hh"

class G4HadronStoppingProcess : public G4HadronicProcess
{ 
public:
 
  explicit G4HadronStoppingProcess(const G4String& name = "hadronCaptureAtRest");

  virtual ~G4HadronStoppingProcess();

  virtual G4bool IsApplicable(const G4ParticleDefinition&);

  virtual void PreparePhysicsTable(const G4ParticleDefinition&);

  virtual void BuildPhysicsTable(const G4ParticleDefinition&);

  virtual G4double 
  AtRestGetPhysicalInteractionLength(const G4Track& track,
				     G4ForceCondition* condition);

  virtual G4double 
  PostStepGetPhysicalInteractionLength(const G4Track& track,
				       G4double   previousStepSize,
				       G4ForceCondition* condition);

  virtual G4VParticleChange* AtRestDoIt(const G4Track&, const G4Step&);

  virtual void ProcessDescription(std::ostream& outFile) const;

  inline void SetElementSelector(G4ElementSelector* ptr);

  inline void SetEmCascade(G4HadronicInteraction* ptr);

  inline void SetBoundDecay(G4HadronicInteraction* ptr);

protected:
  // set effective lifetime for at-rest process (default is forced action)
  // FIXME: This should be computed by subprocesses via cross-section analogue
  G4double GetMeanLifeTime(const G4Track& /*aTrack*/,
                           G4ForceCondition* /*condition*/) { return -1.0; }

private:

  // hide assignment operator as private 
  G4HadronStoppingProcess& operator=(const G4HadronStoppingProcess &right);
  G4HadronStoppingProcess(const G4HadronStoppingProcess& );

  G4ElementSelector* fElementSelector;

  G4HadronicInteraction* fEmCascade;
  G4HadronicInteraction* fBoundDecay;

  // This is shadowing "result" in the cc file and
  // looks to be unnecessary.  Removed by DHW, 12 June 2012   
  // G4HadFinalState result;   
};

inline void 
G4HadronStoppingProcess::SetElementSelector(G4ElementSelector* ptr)
{
  if(fElementSelector != ptr) {
    delete fElementSelector;
    fElementSelector = ptr;
  }
}

inline void 
G4HadronStoppingProcess::SetEmCascade(G4HadronicInteraction* ptr)
{
  fEmCascade = ptr;
}

inline void 
G4HadronStoppingProcess::SetBoundDecay(G4HadronicInteraction* ptr)
{
  fBoundDecay = ptr;
}

#endif