#ifndef MATERIALGEOMETER_HPP
#define MATERIALGEOMETER_HPP
//
// $Id: MaterialGeometer.hpp,v 1.5 2000/12/05 16:52:16 hobbs Exp $
//
// File: MaterialGeometer.hpp
// Purpose: Provides user access to the Material geometry
// Created: 02-MAR-1999  Abid Patwa, John Hobbs
//
// $Revision: 1.5 $
//
//
// Follows logic of  Harry's CftMaterialGeometer.hpp
// Include files

#include <geometry_system/management/HandleSystem.hpp>
#include <geometry_system/management/absRcpGeometer.hpp>

// Forward class declarations

class CylindricalShell;
class BareCylindricalSurface;
class BaseGeometry;
namespace dgs { class CylindricalSurface; }

#ifndef RCP_RCP
namespace edm {class RCP;}
#endif

// Provides user access to the Material geometry.

class MaterialGeometer: public dgs::absRcpGeometer {
public:

  // Returns a pointer to the MaterialGeometer.
  static MaterialGeometer* get_instance();

  /// Build the material
  void build(edm::RCP* rcp, BaseGeometry *d0det);
  
  /// Get the beampipe material
  const CylindricalShell* get_beampipe();

  /// Get the solenoid material
  const CylindricalShell* get_solenoid();
   
  /**  Refresh the material geometry.

       Refreshes the material geometry by updating Handle's pointing
       to Base Geometry surfaces.  This method should be called when a
       new Base Geometry has been supplied to the MaterialGeometer.

  */
  void refresh() {}

  ///  Prints the geometry.
  void print_geometry();

private:

  ///  Complete the version control interface required by the absRcpGeometer
  bool refresh( const edm::RCP *rcp );

  ///  Private constructor used to manage singleton
  MaterialGeometer();

  ///  Private destructor used to manage singleton
  ~MaterialGeometer();

  ///  The actual geometer.
  static MaterialGeometer*  d_theGeometer;

  ///  Cache of surface handles.
  dgs::HandleCache<const dgs::CylindricalSurface> d_cache;

  /// For speed, hold pointers to the bp and solenoid permanently.
  const CylindricalShell* _bpshell;
  const CylindricalShell* _solndshell;

  /// Temporarily used.  Will be fixed up later
  BaseGeometry* _d0det;
};

#endif //MATERIALGEOMETER_HPP