code: public static String normalize(final String uri) {
          String normalizedUri = null;
          if (uri != null) {
              normalizedUri = uri; // TODO THIS HAS TO BE IMPLEMENTED
          }
          return normalizedUri;
      }
docs: Normalizes an URI as specified in RFC 2396bis.
  <p>
  
  @param uri to normalize.
  @return the normalized value of the given URI, or <b>null</b> if the given URI was
  <b>null</b>.