/// <summary>
/// 获得指定枚举的所有值名称
/// </summary>
/// <param name="type">指定的类型，可以为枚举或可空枚举</param>
/// <returns>所有值名称的集合</returns>
/// <exception cref="T:System.ArgumentNullException">type为null</exception>
public static HashSet <string> GetEnumNameKeys(Type type)
{
if (type == null)
{
throw new ArgumentNullException("type");
}
var enumType = FishObjectExtension.GetTypeInfo(type);
if (enumType.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
type = enumType.GetGenericArguments()[0];
enumType = FishObjectExtension.GetTypeInfo(type);
}
if (!enumType.IsEnum)
{
throw new InvalidProgramException("Not an enum type.");
}
HashSet <string> result;
if (!_enumNameKeysCache.TryGetValue(type, out result))
{
lock (_lockObject)
{
if (!_enumNameKeysCache.ContainsKey(type))
{
_enumNameKeysCache.Add(type, Enum.GetNames(type).MapToHashSet(StringComparer.OrdinalIgnoreCase));
}
}
result = _enumNameKeysCache[type];
}
return(result);
}
/// <summary>
/// 判断指定的类型是否具有指定的接口
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="t"></param>
/// <returns></returns>
public static bool HasInterface <T>(this Type t)
{
return(t != null && (FishObjectExtension.GetTypeInfo(t)).GetInterface(typeof(T).FullName) != null);
}