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// $Id$
//

#ifndef G4VUserDetectorConstruction_h
#define G4VUserDetectorConstruction_h 1

class G4VPhysicalVolume;
class G4VUserParallelWorld;

#include <vector>
#include "globals.hh"

// class description:
//
//  This is the abstract base class of the user's mandatory initialization class
// for detector setup. It has only one pure virtual method Construct() which is
// invoked by G4RunManager when it's Initialize() method is invoked.
//  The Construct() method must return the G4VPhysicalVolume pointer which represents
// the world volume.
//

class G4VUserDetectorConstruction
{
  public:
    G4VUserDetectorConstruction();
    virtual ~G4VUserDetectorConstruction();

  public:
    virtual G4VPhysicalVolume* Construct() = 0;

  public:
    void RegisterParallelWorld(G4VUserParallelWorld*);

  public:
    G4int ConstructParallelGeometries();

  private:
    std::vector<G4VUserParallelWorld*> parallelWorld;

  public:
    G4int GetNumberOfParallelWorld() const;
    G4VUserParallelWorld* GetParallelWorld(G4int i) const;
};

#endif