@Override
		public Class<?> getColumnClass(int columnIndex) {
			switch (columnIndex) {
				case 0:
				case 1:
					return Integer.class;
				case 2:
				case 3:
				case 4:
				case 5:
					return String.class;
				default:
					throw new IllegalArgumentException("Unknown column " + columnIndex);
			}
		}