protected void transformDateFieldValue(Element dynamicContentElement) {
    String value = dynamicContentElement.getText();

    if (!Validator.isNumber(value)) {
      return;
    }

    Date date = new Date(GetterUtil.getLong(value));

    dynamicContentElement.clearContent();

    dynamicContentElement.addCDATA(_dateFormat.format(date));
  }
  protected void updateField(Element dynamicContentElement, Serializable fieldValue) {

    dynamicContentElement.clearContent();

    if (fieldValue instanceof Date) {
      Date valueDate = (Date) fieldValue;

      fieldValue = valueDate.getTime();
    }

    String valueString = String.valueOf(fieldValue);

    dynamicContentElement.addCDATA(valueString.trim());
  }