/// <summary>
/// Registers a factory for a scheme, overwriting any existing factory for that scheme.
/// </summary>
/// <typeparam name="T">The type of the URI.</typeparam>
/// <param name="scheme">The scheme. This must be a valid scheme, as defined by <see cref="Utility.IsValidScheme"/>.</param>
/// <param name="factory">The factory method for URIs following this scheme. This method must perform any scheme-specific validation.</param>
public static void RegisterSchemeFactory <T>(string scheme, Utility.DelegateFactory <T> factory)
where T : IUniformResourceIdentifier
{
if (scheme == null || !Utility.IsValidScheme(scheme))
{
throw new ArgumentException("Invalid scheme " + scheme, nameof(scheme));
}
lock (_factories)
{
_factories[scheme] = (userInfo, host, port, pathSegments, query, fragment) => factory(userInfo, host, port, pathSegments, query, fragment);
}
}
/// <summary>
/// Constructs a new URI instance.
/// </summary>
/// <param name="scheme">The scheme. This is converted to lowercase. Must be a valid scheme as defined by <see cref="Utility.IsValidScheme"/>.</param>
/// <param name="userInfo">The user information portion of the authority, if any. This may be <c>null</c> to indicate no user info, or the empty string to indicate empty user info.</param>
/// <param name="host">The host name portion of the authority, if any. This is converted to lowercase. This may be <c>null</c> to indicate no host name, or the empty string to indicate an empty host name.</param>
/// <param name="port">The port portion of the authority, if any. This may be <c>null</c> to indicate no port, or the empty string to indicate an empty port. This must be <c>null</c>, the empty string, or a valid port as defined by <see cref="Utility.IsValidPort"/>.</param>
/// <param name="pathSegments">The path segments. Dot segments are normalized. May not be <c>null</c>, neither may any element be <c>null</c>.</param>
/// <param name="query">The query. This may be <c>null</c> to indicate no query, or the empty string to indicate an empty query.</param>
/// <param name="fragment">The fragment. This may be <c>null</c> to indicate no fragment, or the empty string to indicate an empty fragment.</param>
public GenericUniformResourceIdentifier(string scheme, string?userInfo, string?host, string?port, IEnumerable <string> pathSegments, string?query, string?fragment)
{
_ = scheme ?? throw new ArgumentNullException(nameof(scheme));
if (!Utility.IsValidScheme(scheme))
{
throw new ArgumentException("Invalid scheme " + scheme, nameof(scheme));
}
Scheme = scheme.ToLowerInvariant();
UserInfo = userInfo;
_host = new NormalizedHost(host);
_port = new NormalizedPort(port);
_pathSegments = new NormalizedPathSegments(pathSegments, UserInfo, _host.Value, _port.Value);
Query = query;
Fragment = fragment;
_factory = CreateFactory(scheme);
}