static void Main(string[] args)
{
Console.WriteLine("***Memento Pattern Demo***\n");
//Originator is initialized with a state
Originator originatorObject = new Originator();
Memento mementoObject;
originatorObject.State = " Initial state ";
//Console.WriteLine("Current State : {0} ", originatorObject.State);
mementoObject = originatorObject.GetTheMemento();
//Making a new state
originatorObject.State = " Intermediary state ";
// Restore to the previous state
originatorObject.RevertToState(mementoObject);
//Console.WriteLine("Current State : {0} ", originatorObject.State);
// Wait for user's input
Console.ReadKey();
}
static void Main(string[] args)
{
Console.WriteLine("***Memento Pattern QAs***");
Console.WriteLine("***Demonstration-Caretaker is using multiple restore points * **\n");
//Originator is initialized with a state
Originator originatorObject = new Originator();
Memento mementoObject;
IList <Memento> savedStates = new List <Memento>();
Console.WriteLine("A new set of verification");
//State-1
originatorObject.State = "State-1";
savedStates.Add(originatorObject.GetTheMemento());
//State-2
originatorObject.State = "State-2";
savedStates.Add(originatorObject.GetTheMemento());
//State-3
originatorObject.State = "State-3";
savedStates.Add(originatorObject.GetTheMemento());
//State-4 which is not saved
originatorObject.State = "State-4";
//Available restore points
Console.WriteLine("Currently available restore points are :");
foreach (Memento m in savedStates)
{
Console.WriteLine(m.State);
}
//Roll back starts...
Console.WriteLine("Started restoring process...");
for (int i = savedStates.Count; i > 0; i--)
{
mementoObject = originatorObject.GetTheMemento();
mementoObject.State = savedStates[i - 1].State;
originatorObject.RevertToState(mementoObject);
}
// Wait for user
Console.ReadKey();
}