C# factory and abstract factory

Copy from https://dotnettutorials.net/lesson/abstract-factory-design-pattern-csharp/

 

“A factory is an object used for creating other objects. In technical terms, we can say that a factory is a class with a method. That method will create and return different objects based on the received input parameter“.

public interface IHuman
{
    void Eat();
    void Drink();
}

public  class HumanFactory
{
    public static IHuman GetHuman(string humanType)
    {
        IHuman human = null;
        if(humanType=="North")
        {
            human = new NorthHuman();
        }
        else if(humanType=="South")
        {
            human = new SouthHuman();
        }
        return human;
    }
}

public class NorthHuman : IHuman
{
    public void Drink()
    {
        Console.WriteLine("North drink!");
    }

    public void Eat()
    {
        Console.WriteLine("North eat!");
    }
}

public class SouthHuman : IHuman
{
    public void Drink()
    {
        Console.WriteLine("South drink!");
    }

    public void Eat()
    {
        Console.WriteLine("South drink!");
    }
}
    

 static void FactoryDemo()
 {
     IHuman human = HumanFactory.GetHuman("North");
     human.Drink();
     human.Eat();
 }

 

 

The Abstract Factory Design Pattern provides a way to encapsulate a group of factories with a common theme without specifying their concrete classes.

public interface IBike
{
    void GetDetails();
}

public interface ICar
{
    void GetDetails();
}

public class RegularBike : IBike
{
    public void GetDetails()
    {
        Console.WriteLine("RegularBike GetDetails()");
    }
}

public class SportsBike : IBike
{
    public void GetDetails()
    {
        Console.WriteLine("SportsBike GetDetails()!");
    }
}

public class RegularCar : ICar
{
    public void GetDetails()
    {
        Console.WriteLine("RegularCar GetDetails!");
    }
}

public class SportsCar : ICar
{
    public void GetDetails()
    {
        Console.WriteLine("SportsCar GetDetails!");
    }
}

public interface IVehicleFactory
{
    IBike CreateBike();
    ICar CreateCar();
}

public class RegularVehicleFatory : IVehicleFactory
{
    public IBike CreateBike()
    {
        return new RegularBike();
    }

    public ICar CreateCar()
    {
        return new RegularCar();
    }
}

public class SportsVechicleFactory : IVehicleFactory
{
    public IBike CreateBike()
    {
        return new SportsBike();
    }

    public ICar CreateCar()
    {
        return new SportsCar();
    }
}



 static void AbstractFactoryDemo()
 {
     IVehicleFactory regularVehicleFactory = new RegularVehicleFatory();
     IBike regularBike = regularVehicleFactory.CreateBike();
     regularBike.GetDetails();

     ICar regularCar=regularVehicleFactory.CreateCar();
     regularCar.GetDetails();

     IVehicleFactory sportsVehicleFactory = new SportsVechicleFactory();
     IBike sportsBike=sportsVehicleFactory.CreateBike();
     sportsBike.GetDetails();

     ICar sportsCar=sportsVehicleFactory.CreateCar();
     sportsCar.GetDetails();
 }