/**
   * Gets the output string of the cell.
   *
   * @param header_value the header value of the column.
   * @param row the index of row in original order.
   * @return the output string of the cell.
   */
  protected String getCellString(String header_value, int row) {
    Variability record = (Variability) record_list.elementAt(row);

    if (header_value.equals("R.A.")) {
      String coor = record.getStar().getCoor().getOutputString();
      int p = coor.indexOf(' ');
      return coor.substring(0, p);
    }
    if (header_value.equals("Decl.")) {
      String coor = record.getStar().getCoor().getOutputString();
      int p = coor.indexOf(' ');
      return coor.substring(p + 1);
    }
    if (header_value.equals("ID")) {
      if (record.getIdentifiedStar() != null) return record.getIdentifiedStar().getName();
    }
    if (header_value.equals("Max Mag")) {
      return ((XmlMag) record.getBrightestMagnitude().getMag()).getOutputString();
    }
    if (header_value.equals("Min Mag")) {
      return ((XmlMag) record.getFaintestMagnitude().getMag()).getOutputString();
    }
    if (header_value.equals("Mag Range")) {
      return Format.formatDouble(record.getMagnitudeRange(), 5, 2);
    }
    if (header_value.equals("Observations")) {
      return String.valueOf(record.getObservations());
    }
    if (header_value.equals("Positive Observations")) {
      return String.valueOf(record.getPositiveObservations());
    }
    if (header_value.equals("Arc")) {
      return String.valueOf(record.getArcInDays());
    }
    if (header_value.equals("First Date")) {
      String s = record.getFirstDate();
      if (s != null) return s;
    }
    if (header_value.equals("Last Date")) {
      String s = record.getLastDate();
      if (s != null) return s;
    }
    return "";
  }