}

        protected abstract String constraintName()

        protected abstract Authenticator getAuthenticator()

        protected boolean containsUnexpectedAuthentication(HttpServletRequest request) {
            false
        }
    }

    private static class NtlmAuthHandler extends AuthSchemeHandler {
        @Override
        protected String constraintName() {

		if constraint != nil {
			name = constraint.GetName()
		}

		return m.DB.Raw(
			"SELECT count(*) FROM INFORMATION_SCHEMA.table_constraints WHERE constraint_schema = ? AND table_name = ? AND constraint_name = ?",
			currentDatabase, table, name,
		).Row().Scan(&count)
	})

	return count > 0
}

// BuildIndexOptions build index options