G4VTrackState.hh

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/*
 * G4VTrackState.hh
 *
 *  Created on: 8 avr. 2013
 *      Author: kara
 */

#ifndef G4VTRACKSTATE_HH_
#define G4VTRACKSTATE_HH_

#include <CLHEP/Utility/memory.h>

class G4VTrackStateID
{
public :
        virtual int GetStateID() = 0;
protected :
        G4VTrackStateID(){;}
        virtual ~G4VTrackStateID(){;}

        static int fgLastID;
};

class G4TrackState;

template <class T>
class G4TrackStateID : public G4VTrackStateID
{
public :
        static CLHEP::shared_ptr<G4VTrackStateID> Get()
        {
                if(!fgTrackStateID)
                {
                        new G4TrackStateID<T>;
                }

                return fgTrackStateID;
        }

        ~G4TrackStateID<T>(){;}

        virtual int GetStateID()
        {
                return fID;
        }

        static int GetID()
        {
                if(fgTrackStateID)
                        return fgTrackStateID->fID;
                else
                        return -1; // TODO Exception
        }

private:
        G4TrackStateID<T>() : fID(fgLastID)
        {
                fgLastID++;
                fgTrackStateID = this;
        }

        static CLHEP::shared_ptr<G4TrackStateID<T> > fgTrackStateID;
        const int fID;
};


class G4TrackState
{
public:
        template <class T> static G4TrackState* Create()
        {
                G4TrackState* output = new G4TrackState(G4TrackStateID<T>::Get());
                return output;
        }

        int GetID()
        {
                return fpTrackStateID->GetStateID();
        }

protected:
        virtual ~G4TrackState(){}

private :
        G4TrackState(CLHEP::shared_ptr<G4VTrackStateID> _trackStateID) : fpTrackStateID(_trackStateID)
        {}

        CLHEP::shared_ptr<G4VTrackStateID> fpTrackStateID;
};

#endif /* G4VTRACKSTATE_HH_ */