public bool AddBeverage(Beverage bev)
{
if (HasType(bev.GetType()) && !_multipleAllows.Contains(bev.GetType()))
{
return(false);
}
_types.Add(bev.GetType());
_beverage.Add(bev);
return(true);
}
public IEnumerable <int> Start()
{
if (_beverage.GetType() == typeof(Beverages.HotChocolate))
{
return(HotChocolate());
}
if (_beverage.GetType() == typeof(Beverages.IcedCoffe))
{
return(IcedCoffe());
}
if (_beverage.GetType() == typeof(Beverages.LemonTea))
{
return(LemonTea());
}
if (_beverage.GetType() == typeof(Beverages.WhiteCoffee))
{
return(WhiteCoffee());
}
throw new InvalidOperationException("There is no such Beverage!");
}
public static T GetProperty <T>(this Beverage beverage, Expression <Func <BeverageListItemDto, T> > predicate)
where T : IConvertible
{
if (!(predicate.Body is MemberExpression memberExpression))
{
return(default(T));
}
var property = beverage.GetType().GetProperty(memberExpression.Member.Name);
if (property == null)
{
return(default(T));
}
return((T)Convert.ChangeType(property.GetValue(beverage), typeof(T)));
}