private void ChangeState(CustomerState dest)
{
var command = GetCommand(CustomerTransition.Create(State, dest));
if (command == null)
{
throw new Exception($"Command is null for {State} -> {dest}");
}
command.Execute();
}
public CustomerService()
{
RegisterTransition(CustomerTransition.Create(CustomerState.Undefined, CustomerState.New),
new UndefinedToNewCommand());
RegisterTransition(CustomerTransition.Create(CustomerState.New, CustomerState.Confirmed),
new NewToConfirmedCommand());
RegisterTransition(CustomerTransition.Create(CustomerState.New, CustomerState.Unconfirmed),
new NewToUnconfirmedCommand());
}
public void ChangeStateToUnconfirmed()
{
var transition = new CustomerTransition(State, CustomerState.Unconfirmed);
if (!HasTransition(transition))
{
throw new InvalidOperationException(transition.ToString());
}
if (DocumentsSigned)
{
throw new Exception("Documents are signed!");
}
State = CustomerState.Unconfirmed;
}
public Customer(Guid customerId)
{
CustomerId = customerId;
State = CustomerState.Undefined;
RegisterTransition(CustomerTransition.Create(CustomerState.Undefined, CustomerState.New),
new UndefinedToNewCommand(this));
RegisterTransition(CustomerTransition.Create(CustomerState.New, CustomerState.Confirmed),
new NewToConfirmedCommand(this));
RegisterTransition(CustomerTransition.Create(CustomerState.New, CustomerState.Unconfirmed),
new NewToUnconfirmedCommand(this));
ChangeStateToNew();
}
private void ChangeState(Customer customer, CustomerState dest)
{
if (customer == null)
{
throw new ArgumentNullException(nameof(customer));
}
var command = GetCommand(CustomerTransition.Create(customer.State, dest));
if (command == null)
{
throw new Exception($"Command is null for {customer.State} -> {dest}");
}
var baseCustomerCommand = (BaseCustomerCommand)command;
baseCustomerCommand.SetCustomer(customer);
command.Execute();
}