@Override
    public Class<?> getColumnClass(int columnIndex) {
        Class clazz = String.class;
            switch (columnIndex) {
                case 1:
                case 2:
                case 3:
                case 4:
                case 5:
                case 6:
                    clazz = Integer.class;
                    break;
                case 0:
                    clazz = Boolean.class;
                    break;
            }
            return clazz;
        }