Prototype Pattern
Prototype pattern is used for cloning purpose. Specially when creating new object requires intensive work like a lot of queries etc. then instead of doing that, cloning is done by using Prototype Pattern.
Prototype Pattern Example
Here, I have given example of 2 animals Deer and Horse.
public abstract class AnimalPrototype
{
abstract public AnimalPrototype CreateClone();
}
public class Deer : AnimalPrototype
{
public string Name { get; set; }
public int NoOfHorns { get; set; }
public Deer(string name, int noOfHorns)
{
this.Name = name;
this.NoOfHorns = noOfHorns;
}
// Shallow copy
public override AnimalPrototype CreateClone()
{
return (AnimalPrototype)this.MemberwiseClone();
}
}
public class Horse : AnimalPrototype
{
public string Name { get; set; }
public int Speed { get; set; }
public string Color { get; set; }
public Horse(string name, int speed,string color)
{
this.Name = name;
this.Speed = speed;
this.Color = color;
}
// Shallow copy
public override AnimalPrototype CreateClone()
{
return (AnimalPrototype)this.MemberwiseClone();
}
}
class Program
{
static void Main(string[] args)
{
Deer deer = new Deer("Deer-X",2);
Deer deerWithOneHorn = (Deer)deer.CreateClone();
deerWithOneHorn.NoOfHorns = 1;
Console.WriteLine("*** Deer with One Horn***");
Console.WriteLine("No. of Horns = "+deerWithOneHorn.NoOfHorns);
Console.WriteLine("Name = " + deerWithOneHorn.Name);
Horse horse = new Horse("Horse-Y",30,"Black");
Horse horseWithBrownColor = (Horse)horse.CreateClone();
horseWithBrownColor.Color = "Brown";
Console.WriteLine("*** Horse with Brown Color***");
Console.WriteLine("Color = " + horseWithBrownColor.Color);
Console.WriteLine("Name = " + horseWithBrownColor.Name);
Console.WriteLine("Speed = " + horseWithBrownColor.Speed);
Console.ReadKey();
}
}
Prototype Pattern Output
