code: @Override
      protected String getReadOnlyValue(final AbstractUIField _abstractUIField)
          throws EFapsException
      {
          String strValue = "";
          final Object valueTmp = _abstractUIField.getValue()
                          .getReadOnlyValue(_abstractUIField.getParent().getMode());
          if (valueTmp instanceof DateTime) {
              final DateTime datetime = (DateTime) valueTmp;
              final DateTime dateTmp = datetime.withChronology(Context.getThreadContext().getChronology())
                              .withTimeAtStartOfDay();
              strValue = dateTmp.toString(DateUtil.getDateFormatter());
          }
          return strValue;
      }
docs: {@inheritDoc}