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_ */