code: private void evaluateExpressions() throws JspException {
          if (valueEL != null) {
              value = (Date) ExpressionEvaluatorManager.evaluate(
                      "value", valueEL, Date.class, this, pageContext);
          }
  
          if (typeEL != null) {
              type = (String) ExpressionEvaluatorManager.evaluate(
                      "type", typeEL, String.class, this, pageContext);
          }
      }
docs: Evaluates expressions as necessary