#ifndef D0GEOMETRYMESSENGER_HPP
#define D0GEOMETRYMESSENGER_HPP
//
// $Id: d0GeometryMessenger.hpp,v 1.2 2001/06/12 21:18:49 russo Exp $
//
// File: d0GeometryMessenger.hpp
// Purpose: 
// Created:  5-DEC-2000   John Hobbs
//
// $Revision: 1.2 $
//
//

// Include files
#include "absGeometryMessenger.hpp"
#include "d0_geometry/base/BaseGeometry.hpp"

/**  SMT Geometry Messenger.

     Define a messenger to the d0 Geometry telling that there is a
     new version of a non-mutable geometry.  This messenger is
     intended for use in reco, and its real purpose is to allow users
     to get the EnvID for the whole geometry.

  */
class d0GeometryMessenger: public absGeometryMessenger {
public:

  ///  Constructor
  d0GeometryMessenger(absGeometryMessenger* chain=0): 
    absGeometryMessenger(chain) {}

  ///  Refresh with a new BaseGeometry
  void refresh(d0_Ref<BaseGeometry> detector, const bool passnull=false) const;

};
#endif //D0GEOMETRYMESSENGER_HPP