code: public static String parseAndRender(String pAttributeValue)
              throws JspException {
          try {
              return sEvaluator.parseAndRender(pAttributeValue);
          }
          catch (ELException exc) {
              throw new JspException
                      (MessageFormat.format
                              (Constants.ATTRIBUTE_PARSE_EXCEPTION,
                                              "test",
                                              "" + pAttributeValue,
                                      exc.getMessage()));
          }
      }
docs: Parses the given attribute value, then converts it back to a
  String in its canonical form.