Jsf converter using webflow as cache

[leandroorilio]

Hi folks,

I've implemented an jsf conveter using webflow's ViewScope as cache in order to improve throughput, reducing callings to database. I would like to know if I would have some problems with this implementation and if this is a good solution to create a jsf conveter to bussiness entities.

@Override
	public Object getAsObject(FacesContext facesContext, UIComponent component, String submittedValue) {

		if (submittedValue.trim().equals("")) {
			return null;
		} else {
			return (Product) retrieve(submittedValue);
		}
	}

	@Override
	public String getAsString(FacesContext facesContext, UIComponent component, Object value) {
		if (value == null || value.equals("")) {
			return "";
		} else {
			String id = "product_" + new Random().nextInt() + "_" + ((Product) value).getId();
			add((Product) value, id);
			return id;
		}
	}

	private Product retrieve(String id) {
		MutableAttributeMap viewScope = RequestContextHolder.getRequestContext().getViewScope();
		return (Product) viewScope.get(id);
	}

	private void add(Product product, String id) {
		MutableAttributeMap viewScope = RequestContextHolder.getRequestContext().getViewScope();
		viewScope.put(id, product);
	}

Thank you very much!