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Adapter Pattern

According to Adapter pattern, we can convert the interface of class to another interface as per client requirement.


Adapter Pattern Example


Here is an example of a Laptop which has Two-pin Plug but you want to plug it into Three-point switch.

So solution is Adapter Pattern. By applying this pattern, we will plug our two-pin plug into 2-pin to 3-pin converter (adapter) and then plug it into 3-point switch.



Adapter Pattern CD 


    // "Target" interface
    interface TwoPinPlugTargetInterface
    {
        void Request();
    }

    
    // "Adapter" class
    class ThreePinPlugAdapter : TwoPinPlugTargetInterface
    {
        private ThreePointSwitch _adaptee = new ThreePointSwitch();

        public void Request()
        {            
            _adaptee.SpecificRequest();
        }
    }

    // "Adaptee" class
    class ThreePointSwitch
    {
        public void SpecificRequest()
        {
            Console.WriteLine("SpecificRequest() method of "+
                                    "ThreePointSwitch(Adaptee)");
        }
    }
 
    class Program
    {
        static void Main(string[] args)
        {
            TwoPinPlugTargetInterface target = new ThreePinPlugAdapter();
            target.Request();

            Console.ReadKey();
        }
    }