KFParticleDatabase.h

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#ifndef KFParticleDatabase_H
#define KFParticleDatabase_H

#include <map>

class KFParticleDatabase {
 public:
  KFParticleDatabase();

  ~KFParticleDatabase(){};

  float GetMass(int pdg)
  {
    std::map<int, float>::iterator it;
    it = fMass.find(pdg);
    if (it != fMass.end())
      return it->second;
    else
      return 0.13957;
  }

  static KFParticleDatabase *Instance() { return fDatabase; }

 private:
  std::map<int, float> fMass;

  static KFParticleDatabase *fDatabase;
};

#endif