Prototype Design Pattern

This design pattern is come under Creational Pattern in .Net. It is pattern is one of the simplest design patterns. Specify the kinds of objects to create using a prototypical instance, and create new objects by copying this prototype. It will avoid harm of ‘New’ keyword.

The Components of Prototype Design Pattern

Prototype Interface: Represents way for Clone the objects details.

ConcreatePrototype : Represents the implementation of Prototype interface and allow to clone the object itself.

Real Time Usage

Assume that I am one of the member of a Club . Club maintain all the details of members. While joining I have created membership card. After some days my friend also plan to join this club. My friend is living the same flat except name & number are same. In this scenario Prototype  Design pattern will come in to picture. Admin can clone my details and just change name & Phone & and save it new contact. One more scenario like club storing the Business details. If I have start new business then admin can clone my existing Business details and create new Business details.

Example

/// <summary>

    /// Prototype interface implementation

    /// </summary>

    public interface ICards

    {

        ICards Clone();

        void ShowDetail();

    }

    /// <summary>

    /// ConcretePrototype1 Implementation

    /// </summary>

    public class MemberCard : ICards

    {

        public string Name { get; set; }

        public Int64 PhoneNumber { get; set; }

        public string Address { get; set; }

 

        public ICards Clone()

        {

            return (ICards)MemberwiseClone();

        }

 

        public void ShowDetails()

        {

            Console.WriteLine("...............................");

 

            Console.WriteLine("Name  :" + Name);

            Console.WriteLine("PhoneNumber    :" + PhoneNumber);

            Console.WriteLine("Address      :" + Address);

            Console.WriteLine("...............................");

        }

    }

    /// <summary>

    /// ConcretePrototype2 Implementation

    /// </summary>

    public class BusinessCard : ICards

    {

        public string Name { get; set; }

        public Int64 PhoneNumber { get; set; }

        public string Address { get; set; }

 

        public ICards Clone()

        {

            return (ICards)MemberwiseClone();

        }

 

        public void ShowDetails()

        {

            Console.WriteLine("...............................");

            Console.WriteLine("Name  :" + Name);

            Console.WriteLine("PhoneNumber    :" + PhoneNumber);

            Console.WriteLine("Address      :" + Address);

            Console.WriteLine("...............................");

        }

    }

    /// <summary>

    /// ConcretePrototype3 Implementation

    /// </summary>

    public class FamilyCard : ICards

    {

        public string Name { get; set; }

        public Int64 PhoneNumber { get; set; }

        public string Address { get; set; }

        public string SpouseName { get; set; }

 

        public ICards Clone()

        {

            return (ICards)MemberwiseClone();

        }

 

        public void ShowDetails()

        {

            Console.WriteLine("...............................");

 

            Console.WriteLine("Name  :" + Name);

            Console.WriteLine("PhoneNumber    :" + PhoneNumber);

            Console.WriteLine("Address      :" + Address);

            Console.WriteLine("Spouse Name      :" + SpouseName);

            Console.WriteLine("...............................");

        }

    }

Create Call for this

     MemberCard membercard = new MemberCard();

            membercard.Name = "Santhosh";

            membercard.PhoneNumber = 9962513322;

            membercard.Address = "B 101,Marg Pushpadruma";

 

            MemberCard newMembercard = (MemberCard)membercard.Clone();

            newMembercard.Name = "mrs Santhosh";

            newMembercard.PhoneNumber = 9988776655;

 

            membercard.ShowDetails();

            newMembercard.ShowDetails();

 

            BusinessCard businessCard = new BusinessCard();

            businessCard.Name = "Santhosh";

            businessCard.PhoneNumber = 89374972;

            businessCard.Address = "MindTree Chennai";

            BusinessCard newbusinessCard = (BusinessCard)businessCard.Clone();

            newbusinessCard.Address = "BOA";

            businessCard.ShowDetails();

            newbusinessCard.ShowDetails();

 

OutPut: