/// <summary>
/// 檢查previousFeature→currentFeature的順序是否符合規範，否則拋出例外
/// </summary>
/// <typeparam name="T">定義要回傳的TResult</typeparam>
/// <param name="currentCast">當前的功能</param>
/// <param name="func">若順序正確，則要執行的func</param>
/// <returns>TResult</returns>
private T ThrowOrderException <T>(Feature currentCast, Func <T> func)
{
if (FeatureRule.IsTheOrderingLegit(PreviousFeature, currentCast))
{
return(func.Invoke());
}
else
{
throw new OrderException(FeatureRule.ORDER_EXCEPTION_MSG);
}
}
/// <summary>
/// 檢查previousCast→currentCast的順序是否符合規範，否則拋出例外
/// </summary>
/// <typeparam name="T">定義要回傳的TResult</typeparam>
/// <param name="currentCast">當前的功能</param>
/// <param name="func">若順序正確，則要執行的func</param>
/// <returns>TResult</returns>
private T CheckOrder <T>(Feature currentCast, Func <T> func)
{
if (FeatureRule.IsTheOrderingLegit(PreviousCast, currentCast))
{
return(func.Invoke());
}
else
{
throw new OrderException(FeatureRule.INCORRECT_ORDER_MSG);
}
}
/// <summary>
/// Clear事件
/// </summary>
public void Clear()
{
Feature CurrentFeature = Feature.CLEAR;
if (FeatureRule.IsTheOrderingLegit(PreviousFeature, CurrentFeature))
{
NumberMachine.Clear();
//執行成功時記錄下這次的Cast
PreviousFeature = Feature.Null;
}
else
{
throw new OrderException(FeatureRule.ORDER_EXCEPTION_MSG);
}
}
/// <summary>
/// Clear事件
/// </summary>
public void Clear()
{
Feature CurrentCast = Feature.CLEAR;
if (FeatureRule.IsTheOrderingLegit(PreviousCast, CurrentCast))
{
NumberMachine.Clear();
//執行成功時記錄下這次的Cast
//PreviousCast = Cast.CLEAR;
PreviousCast = Feature.Null;
}
else
{
throw new OrderException(FeatureRule.INCORRECT_ORDER_MSG);
}
}