code: protected boolean processQueryParameters(Trace trace, Node node) {
          boolean ret = false;
  
          // Translate query string into a map
          Set<Property> queryString = node.getProperties(Constants.PROP_HTTP_QUERY);
          if (!queryString.isEmpty()) {
              StringTokenizer st = new StringTokenizer(queryString.iterator().next().getValue(), "&");
              while (st.hasMoreTokens()) {
                  String token = st.nextToken();
                  String[] namevalue = token.split("=");
                  if (namevalue.length == 2) {
                      if (queryParameters.contains(namevalue[0])) {
                          try {
                              node.getProperties().add(new Property(namevalue[0],
                                      URLDecoder.decode(namevalue[1], "UTF-8")));
                              ret = true;
                          } catch (UnsupportedEncodingException e) {
                              if (log.isLoggable(Level.FINEST)) {
                                  log.finest("Failed to decode value '" + namevalue[1] + "': " + e);
                              }
                          }
                      } else if (log.isLoggable(Level.FINEST)) {
                          log.finest("Ignoring query parameter '" + namevalue[0] + "'");
                      }
                  } else if (log.isLoggable(Level.FINEST)) {
                      log.finest("Query string part does not include name/value pair: " + token);
                  }
              }
          }
  
          return ret;
      }
docs: This method processes the query parameters associated with the supplied node to extract
  templated named values as properties on the trace node.
  
  @param trace The trace
  @param node The node
  @return Whether query parameters were processed