#ifndef SICENTRAL_HPP
#define SICENTRAL_HPP
//
// $Id: SiCentral.hpp,v 1.6 2001/02/03 22:53:35 hobbs Exp $
//
// File: SiCentral.hpp
// Purpose: 
// Created: 15-DEC-1997   Emanuela Barberis
//
// $Revision: 1.6 $
//
//

// Include files  (iostream added by A. Patwa)
#include <iostream>
#include <list>
#include <vector>
#include <silicon_geometry/base/SiBarrel.hpp>
#include <silicon_geometry/base/SiDisk.hpp>
#include <geometry_system/components/ReferencePoint.hpp>

// Constructors/Destructors

/**
  SMT central unit.
  Each central contains $nb$ barrels and $nd$ disks.
 */
class SiCentral: public dgs::ReferencePoint {
public:

/// Default constructor (empty central).
  SiCentral() {}

/**
   Instantiate a central unit with $nb$ barrels and $nd$ disks.
   The ideal positions are given in $barrel \_pos$ and
   $disk \_pos$.
 */
  SiCentral(int nb, float* barrel_zpos, const SiBarrel* proto_barrels,
	    int nd, float* disk_zpos, const SiDisk* proto_disks);

/**
    Instantiate a central unit with $nb$ barrels, $nd$ disks.                      Construct a central with the barrels and disks
    specified in the vectors ${\it const std::vector<SiBarrel> \&barrels}$
    and ${\it const std::vector<SiDisk> \&disks}$.
*/
  SiCentral(const std::vector<float>& barrel_zpos, 
    	    const std::vector<SiBarrel>& barrels,
	    const std::vector<float>& disk_zpos, 
	    const std::vector<SiDisk>& disks);

/** 
                 Return the address of the children.  
                 Used within dgs::GeometryElement and ReferencePoint to do 
                 positioning.
*/
  const std::list<dgs::GeometryElement*> get_children();

///  Return the number of barrels.
  int get_barrel_count() const;

/// Return a constant reference to the ibarrel-th ibarrel.
  const SiBarrel* get_barrel(int ib)  const;

/// Return a modifiable reference to the ibarrel-th ibarrel.
  SiBarrel* get_mutable_barrel(int ib);

///  Return the number of disks.
  int get_disk_count() const;

/// Return a constant reference to the idisk-th idisk.
  const SiDisk* get_disk(int id)  const;

/// Return a modifiable reference to the idisk-th idisk.
  SiDisk* get_mutable_disk(int id);

/// Text dump a central unit.
  friend std::ostream& operator <<(std::ostream& os, const SiCentral& me);
  friend bool operator <<(const SiCentral& lhs, const SiCentral &rhs);
  friend bool operator ==(const SiCentral& lhs, const SiCentral &rhs);
  friend bool operator !=(const SiCentral& lhs, const SiCentral &rhs);

private:

///  Vector to hold the barrels.
  std::vector<SiBarrel> _barrels;

///  Vector to hold the disks.
  std::vector<SiDisk>   _disks;

public:

  D0_OBJECT_SETUP(SiCentral);

};

// Inlines
#include <silicon_geometry/base/SiCentral.icc>
#endif //SICENTRAL_HPP