public static bool TryParse(string s, out GuidUdi udi)
{
Udi tmp;
udi = null;
if (TryParse(s, out tmp) == false)
{
return(false);
}
udi = tmp as GuidUdi;
return(udi != null);
}
private static bool ParseInternal(string s, bool tryParse, bool knownTypes, out Udi udi)
{
if (knownTypes == false)
{
EnsureScanForUdiTypes();
}
udi = null;
Uri uri;
if (Uri.IsWellFormedUriString(s, UriKind.Absolute) == false ||
Uri.TryCreate(s, UriKind.Absolute, out uri) == false)
{
if (tryParse)
{
return(false);
}
throw new FormatException(string.Format("String \"{0}\" is not a valid udi.", s));
}
var entityType = uri.Host;
UdiType udiType;
if (_udiTypes.TryGetValue(entityType, out udiType) == false)
{
if (knownTypes)
{
// not knowing the type is not an error
// just return the unknown type udi
udi = UnknownTypeUdi.Instance;
return(false);
}
if (tryParse)
{
return(false);
}
throw new FormatException(string.Format("Unknown entity type \"{0}\".", entityType));
}
var path = uri.AbsolutePath.TrimStart('/');
if (udiType == UdiType.GuidUdi)
{
if (path == string.Empty)
{
udi = GetRootUdi(uri.Host);
return(true);
}
Guid guid;
if (Guid.TryParse(path, out guid) == false)
{
if (tryParse)
{
return(false);
}
throw new FormatException(string.Format("String \"{0}\" is not a valid udi.", s));
}
udi = new GuidUdi(uri.Host, guid);
return(true);
}
if (udiType == UdiType.StringUdi)
{
udi = path == string.Empty ? GetRootUdi(uri.Host) : new StringUdi(uri.Host, Uri.UnescapeDataString(path));
return(true);
}
if (tryParse)
{
return(false);
}
throw new InvalidOperationException(string.Format("Invalid udi type \"{0}\".", udiType));
}
