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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 G4MOLECULEHANDLEMANAGER_HH
#define G4MOLECULEHANDLEMANAGER_HH

#include "globals.hh"
#include "G4ReferenceCountedHandle.hh"
#include <map>
#include <CLHEP/Utility/memory.h>

class G4Molecule;

typedef CLHEP::shared_ptr<const G4Molecule> G4MoleculeHandle;

class G4MoleculeHandleManager
{
public:
    static G4MoleculeHandleManager* Instance();
    ~G4MoleculeHandleManager();
    G4MoleculeHandle GetMoleculeHandle(const G4Molecule*);

    static void DeleteInstance();

private:
    G4MoleculeHandleManager();
    static G4MoleculeHandleManager* fInstance;

    struct CompMoleculePointer
    {
        G4bool operator()(const G4Molecule* mol1, const G4Molecule* mol2) const;
    };

    typedef std::map<const G4Molecule* const, G4MoleculeHandle, G4MoleculeHandleManager::CompMoleculePointer> MoleculeHandleMap;
    MoleculeHandleMap fMoleculeHandle;
};

#endif // G4MOLECULEHANDLEMANAGER_HH