@Override
	public void scan(String order) {
		if (order == null) {
			throw new NullPointerException("Arguments can't be null.");
		}
		if (order.length() == 0) {
			throw new IllegalArgumentException("Arguments can't be empty.");
		}

		StringBuffer output = new StringBuffer();

		output.append(this.order);
		output.append(order);
		this.order = output.toString();
	}