Illustrated GOF Design Patterns in C# Part III: Structural II

//	example of implementing the Facade pattern

using System;
using	Concrete;

namespace	Concrete
{
	public class	CEngine
	{
		public void	Start()
		{
			Console.WriteLine("Starting engine...ok");
		}

		public void	Runup()
		{
			Console.WriteLine("Performing static runup...ok");
		}

		public void	ThrottleUp()
		{
			Console.WriteLine("Mixture rich, throttle up");
		}
	}

	public class	CAvionics
	{
		public void	SetRadios()
		{
			Console.WriteLine("Setting radios...ok");
		}

		public void	GetClearance(string s)
		{
			Console.WriteLine("Getting clearance for " + s + "...");
		}
	}

	public class	CControls
	{
		public void	GearUp()
		{
			Console.WriteLine("Positive rate of climb, gear up.");
		}

		public void	ReleaseBrakes()
		{
			Console.WriteLine("Releasing brakes...");
		}

		public void	Brake()
		{
			Console.WriteLine("Braking");
		}

		public void	PitchForTakeoff()
		{
			Console.WriteLine("Rotate speed reached, nose up");
		}

		public void	PitchForVy()
		{
			Console.WriteLine("Pitching for best rate of climb.");
		}

		public void	Taxi()
		{
			Console.WriteLine("Taxiing...");
		}
	}

	public class	CFly
	{
		private CEngine	m_oEngine;
		private CAvionics	m_oRadios;
		private CControls	m_oControls;

		public CFly()
		{
			m_oEngine = new CEngine();
			m_oRadios = new CAvionics();
			m_oControls = new CControls();
		}

		public void	Takeoff()
		{
	      Console.WriteLine("Preflight checks and bording complete.");
	      m_oEngine.Start();
	      m_oRadios.SetRadios();
	      m_oRadios.GetClearance("taxi to active runway");
	      m_oControls.ReleaseBrakes();
	      m_oControls.Taxi();
	      Console.WriteLine("Reached runup pad.");
	      m_oControls.Brake();
	      m_oEngine.Runup();
	      m_oRadios.SetRadios();
	      m_oRadios.GetClearance("takeoff");
	      m_oControls.ReleaseBrakes();
	      m_oControls.Taxi();
	      Console.WriteLine("On centerline, ready to go");
	      m_oEngine.ThrottleUp();
	      m_oControls.PitchForTakeoff();
	      m_oControls.PitchForVy();
	      m_oControls.GearUp();
		}
	}
}

namespace	Client
{
	public class	TheClient
	{
		public static void	Main(string[] args)
		{
			CFly	o = new CFly();

			o.Takeoff();
		}
	}
}