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//
// Author: Mathieu Karamitros (kara (AT) cenbg . in2p3 . fr) 
//
// WARNING : This class is released as a prototype.
// It might strongly evolve or even disapear in the next releases.
//
// History:
// -----------
// 10 Oct 2011 M.Karamitros created
//
// -------------------------------------------------------------------

#ifndef G4ITBox_h
#define G4ITBox_h

#include "G4IT.hh"

/**
  * A G4ITBox contains all IT of the same kind.
  * eg : all °OH
  * It behaves just like a stack.
  */

class G4ITBox
{

public :
    G4ITBox();
    ~G4ITBox();

    void ResetStack();
    void Push(G4IT*);
    void Extract(G4IT*);

    /** The FindIT methods are used for check only.
      * Those methods are not effective due to the
      * linear search. It is better to use GetIT(track)
      * in order to retrieve the IT and GetIT(track)->GetBox()
      * in order to check which is the box pointer.
      */
    G4IT* FindIT(const G4Track&) ;
    const G4IT* FindIT(const G4Track&) const;
    void TransferTo(G4ITBox*);

    inline G4bool Empty() const;
    inline G4int GetNTrack() const;

    inline G4IT* GetFirstIT();
    inline G4IT* GetLastIT();
    inline const G4IT* GetFirstIT() const;
    inline const G4IT* GetLastIT() const;

    inline void SetNextBox(G4ITBox* box);
    inline G4ITBox* GetNextBox();
    inline void SetPreviousBox(G4ITBox* box);
    inline G4ITBox* GetPreviousBox();

private :
    const G4ITBox & operator=
    (const G4ITBox &right);
    G4int  fNbIT;
    G4IT * fFirstIT;
    G4IT * fLastIT;

    G4ITBox* fPreviousBox;
    G4ITBox* fNextBox;
};

inline G4bool G4ITBox::Empty() const
{
    return (fNbIT==0);
}

inline G4int G4ITBox::GetNTrack() const
{
    return fNbIT ;
}
inline G4IT* G4ITBox::GetFirstIT()
{
    return fFirstIT ;
}
inline G4IT* G4ITBox::GetLastIT()
{
    return fLastIT ;
}

inline const G4IT* G4ITBox::GetFirstIT() const
{
    return fFirstIT ;
}
inline const G4IT* G4ITBox::GetLastIT() const
{
    return fLastIT ;
}

inline void G4ITBox::SetNextBox(G4ITBox* box)
{
    fNextBox = box;
}

inline G4ITBox* G4ITBox::GetNextBox()
{
    return fNextBox ;
}

inline void G4ITBox::SetPreviousBox(G4ITBox* box)
{
    fPreviousBox = box;
}

inline G4ITBox* G4ITBox::GetPreviousBox()
{
    return fPreviousBox ;
}

#endif