static bool TestMementoPattern()
{
Console.WriteLine("TESTING THE MEMENTO DESIGN PATTERN: ");
Originator <StateObject> current = new Originator <StateObject>();
current.SetState(new StateObject {
Id = 1, Name = "Object 1"
});
CareTaker <StateObject> .SaveState(current);
current.ShowState();
current.SetState(new StateObject {
Id = 2, Name = "Object 2"
});
CareTaker <StateObject> .SaveState(current);
current.ShowState();
current.SetState(new StateObject {
Id = 3, Name = "Object 3"
});
CareTaker <StateObject> .SaveState(current);
current.ShowState();
Console.WriteLine("Restoring the first state");
CareTaker <StateObject> .RestoreState(current, 0);
current.ShowState();
return(true);
}
private static void BehavioralPaterns()
{
#region Chain of Responsability
Console.WriteLine("Chain of reasponsability");
Handler h1 = new ConcretHandler("Handler 1");
h1.Condition = (value) => value > -1 && value < 5;
Handler h2 = new ConcretHandler("Handler 2");
h2.Condition = (value) => value >= 5 && value < 10;
Handler h3 = new ConcretHandler("Handler 3");
h3.Condition = (value) => value > 10 && value < 20;
h1.Successor = h2;
h2.Successor = h3;
foreach (var i in new int[] { 3, 4, 6, 11, 12, 18 })
{
h1.HandleRequest(i);
}
#endregion
#region Iterator
Console.WriteLine("Iterator");
Aggregate <Iterator> ag = new Aggregate <Iterator>();
ag[0] = "A";
ag[1] = "B";
ag[2] = "C";
// Creating the iterator based on Aggregate instance
Iterator it = ag.CreateIterator() as Iterator;
object item = it.First();
while (item != null)
{
Console.WriteLine(item);
item = it.Next();
}
#endregion
#region Mememnto
Console.WriteLine("Mememnto");
Originator <StateObject> current = new Originator <StateObject>();
current.SetState(new StateObject {
Id = 1, Name = "Object one"
});
CareTaker <StateObject> .SaveState(current);
current.SetState(new StateObject {
Id = 2, Name = "Object two"
});
CareTaker <StateObject> .SaveState(current);
current.ShowState();
current.SetState(new StateObject {
Id = 3, Name = "Object three"
});
CareTaker <StateObject> .SaveState(current);
current.ShowState();
// restore to specific state
CareTaker <StateObject> .RestoreState(current, 0);
current.ShowState();
#endregion
}