static Exception _TryParseList(string text, out IteratedSegmentSequence segments) {
segments = null;
string[] items = text.Split('/', '\\');
List<Segment> results = new List<Segment>(items.Length);
foreach (string s in items) {
Segment sgt;
if (s.Length == 0) {
// TODO Only apply at real root; enforce match segment as file or directory
sgt = new RootSegment();
} else if (DEVICE.IsMatch(s)) {
sgt = new DeviceSegment(DEVICE.Match(s).Groups["Name"].Value);
} else if (s == "*") {
sgt = new AnyDirectorySegment();
} else if (s == "**") {
sgt = new RecursiveSegment();
// TODO Support directory navigation
} else if (s == "..") {
throw new NotImplementedException();
} else if (s == ".") {
sgt = new CwdSegment();
} else {
string segment = ExpandSegment(s);
if (segment == null)
return Failure.NotParsable("text", typeof(Glob));
sgt = new MatchSegment(segment);
}
results.Add(sgt);
}
segments = new IteratedSegmentSequence(results.ToArray());
return null;
}
static Exception _TryParse(string text, IServiceProvider serviceProvider, out QualifiedName result)
{
serviceProvider = serviceProvider ?? ServiceProvider.Null;
result = null;
if (string.IsNullOrEmpty(text))
{
throw Failure.NullOrEmptyString(nameof(text));
}
// Remove decorations: [prefix:b] ==> prefix:b
if (text[0] == '[' && text[text.Length - 1] == ']')
{
text = text.Substring(1, text.Length - 2);
}
else if (text[0] == '{')
{
int num = text.LastIndexOf('}');
if ((num <= 1) || (num == (text.Length - 1)))
{
return(Failure.NotParsable("text", typeof(QualifiedName)));
}
if (num - 1 == 0)
{
// The default namespace is used (as in '{} expandedName')
result = NamespaceUri.Default.GetName(text.Trim());
return(null);
}
else
{
// Some other namespace is used
string ns = text.Substring(1, num - 1);
string localName = text.Substring(num + 1).Trim();
NamespaceUri nu = NamespaceUri._TryParse(ns, false);
if (nu == null)
{
return(Failure.NotParsable("text", typeof(QualifiedName)));
}
result = nu.GetName(localName);
return(null);
}
}
if (!text.Contains(":"))
{
result = NamespaceUri.Default.GetName(text.Trim());
return(null);
}
var resolver = (IXmlNamespaceResolver)serviceProvider.GetService(typeof(IXmlNamespaceResolver))
?? XmlNamespaceResolver.Global;
int index = text.IndexOf(':');
string prefix = text.Substring(0, index);
string name = text.Substring(index + 1);
string fullNs = resolver.LookupNamespace(prefix);
if (fullNs != null)
{
result = QualifiedName.Create(fullNs, name);
return(null);
}
return(Failure.NotParsable("text", typeof(QualifiedName), RuntimeFailure.CannotExpandPrefixNotFound(prefix)));
}