Abstract Class

[sinceremansi]

I have implemented a program for Facade pattern.

Below 2 posted are the same code, one using abstract class and another using a concrete class.

As I am bad with implementing anything using abstract class, I need your help to confirm that whatever I have implemented using the abstract class is correct or not.

Please HELP!!!

Code without Abstract class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Facade_CSharp
{
class Program
{
static void Main(string[] args)
{
Facade facade = new Facade();

facade.ProcessA();
facade.ProcessB();

// Wait for user
Console.ReadKey();
}
}

/// <summary>
/// The 'Subsystem ClassA' class
/// </summary>
class SubSystemOne
{
public void MethodOne()
{
Console.WriteLine(" SubSystem One");
}
}

/// <summary>
/// The 'Subsystem ClassB' class
/// </summary>
class SubSystemTwo
{
public void MethodTwo()
{
Console.WriteLine(" SubSystem Two");
}
}

/// <summary>
/// The 'Subsystem ClassC' class
/// </summary>
class SubSystemThree
{
public void MethodThree()
{
Console.WriteLine(" SubSystem Three");
}
}

/// <summary>
/// The 'Subsystem ClassD' class
/// </summary>
class SubSystemFour
{
public void MethodFour()
{
Console.WriteLine(" SubSystem Four");
}
}

/// <summary>
/// The 'Facade' class
/// </summary>
class Facade
{
private SubSystemOne _one;
private SubSystemTwo _two;
private SubSystemThree _three;
private SubSystemFour _four;

public Facade()
{
Console.WriteLine("\nRequests received from Client System and Facade is in execution... ");

_one = new SubSystemOne();
_two = new SubSystemTwo();
_three = new SubSystemThree();
_four = new SubSystemFour();
}

public void ProcessA()
{
Console.WriteLine("\nProcessA of Facade uses the following subsystems to accomplish the task:");
_one.MethodOne();
_two.MethodTwo();
_four.MethodFour();
}

public void ProcessB()
{
Console.WriteLine("\nProcessB of Facade uses the following subsystems to accomplish the task:");
_two.MethodTwo();
_three.MethodThree();
}
}
}

Code with Abstract Class: (This needs to be confirmed if its correctly implemented)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Facade_abstract
{
class Program
{
static void Main(string[] args)
{
FacadeAbs facade = new FacadeAbs();

facade.ProcessA();
facade.ProcessB();

// Wait for user
Console.ReadKey();

}
}

class SubSystemOne
{
public void MethodOne()
{
Console.WriteLine(" SubSystem One");
}
}

/// <summary>
/// The 'Subsystem ClassB' class
/// </summary>
class SubSystemTwo
{
public void MethodTwo()
{
Console.WriteLine(" SubSystem Two");
}
}

/// <summary>
/// The 'Subsystem ClassC' class
/// </summary>
class SubSystemThree
{
public void MethodThree()
{
Console.WriteLine(" SubSystem Three");
}
}

/// <summary>
/// The 'Subsystem ClassD' class
/// </summary>
class SubSystemFour
{
public void MethodFour()
{
Console.WriteLine(" SubSystem Four");
}
}

/// <summary>
/// The 'Facade' class
/// </summary>
public abstract class Facade
{
//public abstract Facade();

public abstract void ProcessA();

public abstract void ProcessB();

}

public class FacadeAbs : Facade
{
private SubSystemOne _one;
private SubSystemTwo _two;
private SubSystemThree _three;
private SubSystemFour _four;

public FacadeAbs()
{
Console.WriteLine("\nRequests received from Client System and Facade is in execution... ");

_one = new SubSystemOne();
_two = new SubSystemTwo();
_three = new SubSystemThree();
_four = new SubSystemFour();
}


public override void ProcessA()
{
Console.WriteLine("\nProcessA of Facade uses the following subsystems to accomplish the task:");
_one.MethodOne();
_two.MethodTwo();
_four.MethodFour();
}

public override void ProcessB()
{
Console.WriteLine("\nProcessB of Facade uses the following subsystems to accomplish the task:");
_two.MethodTwo();
_three.MethodThree();
}

}
}

Output of both the programs:

Requests received from Client System and Facade is in execution...

ProcessA of Facade uses the following subsystems to accomplish the task:
SubSystem One
SubSystem Two
SubSystem Four

ProcessB of Facade uses the following subsystems to accomplish the task:
SubSystem Two
SubSystem Three
Thanks in advance.

[foamy]

Welcome to the forum

please use [ code ] [ /code ] around your code to make it more readable.

[BigEd781]

"Correct" how? What are the problems you are having?