public Class<?> getColumnClass(int column) {
        switch (column) {
            case 0:
                return ImageIcon.class;
            case 2:
                return Long.class;
            case 3:
                return Date.class;
            case 4:
            case 5:
            case 6:
            case 7:
            case 8:
            	return Boolean.class;          
        }
        return String.class;
    }