enum AuthScheme {
    BASIC(new BasicAuthHandler()),
    DIGEST(new DigestAuthHandler()),
    HIDE_UNAUTHORIZED(new HideUnauthorizedBasicAuthHandler()),
    NTLM(new NtlmAuthHandler()),
    HEADER(new HttpHeaderAuthHandler())

    final AuthSchemeHandler handler

    AuthScheme(AuthSchemeHandler handler) {
        this.handler = handler
    }

    private static class BasicAuthHandler extends AuthSchemeHandler {