public Class<?> getColumnClass(int col) {
			switch(col)
			{
			//Read-only
			case 0: return Boolean.class;
			//Part-name
			case 1: return String.class;
			//Base-addr
			case 2: return String.class;
			//Size
			case 3: return String.class;
			default: return String.class;
			}
		}