static void Main()
{
/********** Creationals Patterns **********/
#region Singleton
Console.WriteLine("********** Singleton pattern **********\n");
var s1 = Singleton.GetSingleton();
var s2 = Singleton.GetSingleton();
if (s1 == s2)
{
Console.WriteLine("Singleton works, both variables contain the same instance.");
}
else
{
Console.WriteLine("Singleton failed, variables contain different instances.");
}
#endregion
#region Prototype
Console.WriteLine("\n********** Prototype pattern **********\n");
// Create an instance of Person and assign values to its fields.
Person p1 = new Person
{
Age = 42,
Name = "Sam",
IdInfo = new IdInfo(6565)
};
// Perform a shallow copy of p1 and assign it to p2.
Person p2 = p1.ShallowCopy();
// Display values of p1, p2
Console.WriteLine("Original values of p1 and p2:");
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p2 instance values:");
DisplayValues(p2);
// Change the value of p1 properties and display the values of p1 and p2.
p1.Age = 32;
p1.Name = "Frank";
p1.IdInfo.IdNumber = 7878;
Console.WriteLine("\nValues of p1 and p2 after changes to p1:");
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p2 instance values:");
DisplayValues(p2);
// Make a deep copy of p1 and assign it to p3.
Person p3 = p1.DeepCopy();
// Change the members of the p1 class to new values to show the deep copy.
p1.Name = "George";
p1.Age = 39;
p1.IdInfo.IdNumber = 8641;
Console.WriteLine("\nValues of p1 and p3 after changes to p1:");
Console.WriteLine(" p1 instance values: ");
DisplayValues(p1);
Console.WriteLine(" p3 instance values:");
DisplayValues(p3);
Console.WriteLine("\nTest PrototypeModule");
var protoNames = new[] { "Garbage", "Alpha Version", "Beta Version", "Nothing", "Release Candidate" };
InitializePrototypes();
List <IPrototype> prototypes = new List <IPrototype>();
// 6. Client does not use "new"
foreach (var protoName in protoNames)
{
IPrototype prototype = PrototypeModule.CreatePrototype(protoName);
if (prototype != null)
{
prototypes.Add(prototype);
}
}
foreach (var p in prototypes)
{
p.Execute();
}
