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//
// Hadronic Process: Nuclear De-excitations
// by V. Lara


#ifndef G4FermiIntegerPartition_hh
#define G4FermiIntegerPartition_hh

#define G4FermiIntegerPartition_debug 1
#include "globals.hh"
#include <vector>

#ifdef G4FermiIntegerPartition_debug
#include <numeric>
#endif


class G4FermiIntegerPartition
{
public:
  inline G4FermiIntegerPartition();
  inline ~G4FermiIntegerPartition();
  inline G4FermiIntegerPartition(const G4FermiIntegerPartition&);

  inline const G4FermiIntegerPartition & operator=(const G4FermiIntegerPartition&);
  G4bool operator==(const G4FermiIntegerPartition&);
  G4bool operator!=(const G4FermiIntegerPartition&);

  inline void EnableNull(const G4bool v=true);
  void Initialize(const G4int, const G4int);
  G4bool Next();
  inline std::vector<G4int> GetPartition() const;

private:
#ifdef G4FermiIntegerPartition_debug
  inline G4int GetSum();
  void TestPartition();
#endif

private:
  G4int total;
  G4bool enableNull;
  std::vector<G4int> partition;
};

#include "G4FermiIntegerPartition.icc"

#endif