public void undo()
{
og.GetStateFromMemento(caretaker.GetMemento());
currentUser._cities = og.getState()._cities;
var mementoList = currentUser._cities;
var lists = uservice.getcities(currentUser);
foreach (string city in currentUser._cities)
{
uservice.addCity(city, currentUser);
}
foreach (string city in lists)
{
if (!currentUser._cities.Contains(city))
{
uservice.deletecity(city, currentUser);
}
}
cities_window1.updateList(currentUser._cities);
if (caretaker.Size() > 0)
{
button2.Show();
}
else
{
button2.Hide();
}
}
public void Main()
{
Originator originator = new Originator();
CareTaker careTaker = new CareTaker();
originator.SetState("State #1");
originator.SetState("State #2");
careTaker.Add(originator.SaveStateToMemento());
originator.SetState("State #3");
careTaker.Add(originator.SaveStateToMemento());
originator.SetState("State #4");
Console.WriteLine("Current State: " + originator.GetState());
originator.GetStateFromMemento(careTaker.Get(0));
Console.WriteLine("First saved State: " + originator.GetState());
originator.GetStateFromMemento(careTaker.Get(1));
Console.WriteLine("Second saved State: " + originator.GetState());
}
public void Start()
{
var originator = new Originator();
var careTaker = new CareTaker();
originator.SetState("State #1");
originator.SetState("State #2");
careTaker.Add(originator.SaveStateToMemento());
originator.SetState("State #3");
careTaker.Add(originator.SaveStateToMemento());
originator.SetState("State #4");
logger.Info($"Current State: {originator.State}.");
originator.GetStateFromMemento(careTaker.Get(0));
logger.Info($"First Saved State: {originator.State}.");
originator.GetStateFromMemento(careTaker.Get(1));
logger.Info($"Second Saved State: {originator.State}.");
}
static void Main(string[] args)
{
Originator originator = new Originator();
CareTaker careTaker = new CareTaker();
originator.State = "State #1";
originator.State = "State #2";
careTaker.Add(originator.saveStateToMemento());
originator.State = "State #3";
careTaker.Add(originator.saveStateToMemento());
originator.State = "State #4";
Console.WriteLine("Current State: " + originator.State);
originator.GetStateFromMemento(careTaker.Get(0));
Console.WriteLine("First saved State: " + originator.State);
originator.GetStateFromMemento(careTaker.Get(1));
Console.WriteLine("Second saved State: " + originator.State);
Console.ReadKey();
}
/*
* Sem violar encapsulamento, captura e externaliza um
* estado de objeto interno e entao este objeto pode ser restaurado
* para um estado anterior
*
* Quando usar:
* - um Snapshot de um objeto deve ser salvo para ser restaurado depois
* - uma interface direta para obter um estado iria expor detalhes
* da implementação e quebrar o encapsulamento
*/
static void Main(string[] args)
{
Originator originator = new Originator();
CareTaker caretaker = new CareTaker();
originator.State = "#1";
originator.State = "#2";
caretaker.AddMement(originator.SaveState());
originator.State = "#3";
caretaker.AddMement(originator.SaveState());
originator.State = "#4";
Console.WriteLine("Actual State: " + originator.State);
originator.GetStateFromMemento(caretaker.Get(1));
Console.WriteLine("Actual State: " + originator.State);
originator.GetStateFromMemento(caretaker.Get(0));
Console.WriteLine("Actual State: " + originator.State);
Console.ReadKey();
}
public void ReturnItem()
{
originator.GetStateFromMemento(careTaker.Get());
item = originator.GetState();
}
