JTableにソートされないサマリー行を表示する

public JTable makeTable() {
  JTable table = new JTable(model);
  RowFilter<TableModel, Integer> filter = new RowFilter<>() {
    @Override public boolean include(
      Entry<? extends TableModel, ? extends Integer> entry) {
      int i0 = table.convertRowIndexToView(entry.getIdentifier());
      return i0 != 0;
    }
  };
  TableRowSorter<TableModel> s = new TableRowSorter<TableModel>(model) {
    @Override public void toggleSortOrder(int column) {
      RowFilter<? super TableModel, ? super Integer> f = getRowFilter();
      setRowFilter(null);
      super.toggleSortOrder(column);
      setRowFilter(f);
    }
  };
  s.setRowFilter(filter);
  // s.setSortsOnUpdates(true);
  s.toggleSortOrder(1);
  table.setRowSorter(s);

  TableColumnModel col = table.getColumnModel();
  for (int i = 0; i < col.getColumnCount(); i++) {
    TableCellRenderer r = table.getDefaultRenderer(model.getColumnClass(i));
    col.getColumn(i).setCellRenderer(new TableCellRenderer() {
      @Override public Component getTableCellRendererComponent(
          JTable table, Object value,
          boolean isSelected, boolean hasFocus, int row, int column) {
        JLabel l;
        if (row == model.getRowCount() - 2) {
          int i = getSum(table.convertColumnIndexToModel(column));
          l = (JLabel) r.getTableCellRendererComponent(
              table, i, isSelected, hasFocus, row, column);
          l.setBackground(Color.ORANGE);
        } else {
          l = (JLabel) r.getTableCellRendererComponent(
              table, value, isSelected, hasFocus, row, column);
          l.setBackground(Color.WHITE);
        }
        l.setForeground(Color.BLACK);
        return l;
      }
    });
  }
  return table;
}