/cvmfs/atlas.cern.ch/repo/sw/ASG/AnalysisBase/2.4.31/xAODParticleEvent/xAODParticleEvent/versions/Particle_v1.h

// Dear emacs, this is -*- c++ -*-
// $Id: Particle_v1.h 637086 2014-12-19 16:02:19Z kkoeneke $
#ifndef XAODPARTICLEEVENT_VERSIONS_PARTICLE_V1_H
#define XAODPARTICLEEVENT_VERSIONS_PARTICLE_V1_H


// STL includes
#include <vector>

// xAOD include(s):
#include "xAODBase/IParticle.h"
#include "xAODBase/IParticleContainer.h"
#include "AthLinks/ElementLink.h"


namespace xAOD {

  class Particle_v1 : public IParticle {

  public:
    Particle_v1();

    //Particle_v1(const Particle_v1& other);

    //virtual ~Particle_v1();


    virtual double           pt() const;
    virtual double           eta() const;
    virtual double           phi() const;
    virtual double           m() const;
    virtual double           e() const;
    virtual double           rapidity() const;

    typedef IParticle::FourMom_t FourMom_t;

    virtual const FourMom_t& p4() const;

    virtual Type::ObjectType type() const;



    double   px() const;
    double   py() const;
    double   pz() const;
    double   et() const;


    void setP4(      const FourMom_t& vec );
    void setPxPyPzE( double px, double py, double pz, double e );
    void setPx(      double px );
    void setPy(      double py );
    void setPz(      double pz );
    void setE(       double e  );



    bool hasCharge() const;
    float charge() const;
    void setCharge( float charge );

    bool hasPdgId() const;
    int pdgId() const;
    void setPdgId( int pdgID );



  public:

    void toPersistent();

  private:
    mutable FourMom_t m_p4;

    mutable bool m_p4Cached;

  }; // class Particle_v1


} // namespace xAOD

#endif // XAODPARTICLEEVENT_VERSIONS_PARTICLE_V1_H

---