public Transition(eTurnstileState start_state,
eTurnstileState end_state,
eTurnstileEvent event_trigger,
Action action)
{
StartState = start_state;
EndState = end_state;
EventTrigger = event_trigger;
Action = action;
}
/// <summary>
/// 状态事件解释引擎
/// </summary>
/// <param name="e"></param>
public void HandleEvent(eTurnstileEvent e)
{
foreach (var transition in _transitions)
{
if (State == transition.StartState &&
e == transition.EventTrigger)
{
transition.Action();
State = transition.EndState;
}
}
}
public Turnstile(ITurnstileController controller)
{
// 构建状态迁移表
Action unlock = controller.Unlock;
Action alarm = controller.Alarm;
Action thankyou = controller.Thankyou;
Action lock_action = controller.Lock;
AddTransition(eTurnstileState.Locked, eTurnstileState.Unlocked, eTurnstileEvent.Coin, unlock);
AddTransition(eTurnstileState.Locked, eTurnstileState.Locked, eTurnstileEvent.Pass, alarm);
AddTransition(eTurnstileState.Unlocked, eTurnstileState.Unlocked, eTurnstileEvent.Coin, thankyou);
AddTransition(eTurnstileState.Unlocked, eTurnstileState.Locked, eTurnstileEvent.Pass, lock_action);
State = eTurnstileState.Locked;
}
private void AddTransition(eTurnstileState start, eTurnstileState end,
eTurnstileEvent e, Action action)
{
_transitions.Add(new Transition(start, end, e, action));
}
