JSF: How to bind many of h:selectBooleanCheckbox ?

Question

I have a problem to bind list of h:selectBooleanCheckbox to my bean. Anybody helps ?

This is not working:

<ui:repeat value="#{cartBean.productsList}" var="cartProduct" varStatus="i">
   <h:selectBooleanCheckbox binding="#{cartBean.checkboxes[i.index]}" />
</ui:repeat>

public class CartBean extends BaseBean {
  public List<Product> getProductsList() {...}

  private HtmlSelectBooleanCheckbox[] checkboxes;
  public HtmlSelectBooleanCheckbox[] getCheckboxes() {
    return checkboxes;
  }
  public void setCheckboxes(HtmlSelectBooleanCheckbox[] checkboxes) {
    this.checkboxes = checkboxes;
  }
}

I get error:

javax.faces.FacesException: javax.el.PropertyNotFoundException: /WEB-INF/flows/main/cart.xhtml @26,97 binding="#{cartBean.checkboxes[i.index]}": Target Unreachable, 'checkboxes' returned null

---

I solved my problem. I used code like below and get what i want (thanks to BalusC blog - http://balusc.blogspot.com/2006/06/using-datatables.html#SelectMultipleRows):

<ui:repeat value="#{cartBean.productsList}" var="cartProduct" varStatus="i">
  <h:selectBooleanCheckbox value="#{cartBean.selectedIds[cartProduct.id]}" />
</ui:repeat>

public class CartBean extends BaseBean {
  private Map<Integer, Boolean> selectedIds = new HashMap<Integer, Boolean>();
  public Map<Integer, Boolean> getSelectedIds() {
    return selectedIds;
  }
}

Answer 1

I don't know if you can bind elements stored in an array. But in your code, the problem is that your HtmlSelectBooleanCheckbox[] is null. So maybe change your Java code to:

public HtmlSelectBooleanCheckbox[] getCheckboxes() {
    if (checkboxes == null) {
        checkboxes = new HtmlSelectBooleanCheckbox[getProductsList().size()];
    }
    return checkboxes;
}

but I am really not sure if it will work... Maybe the solution is to not bind your HtmlSelectBooleanCheckbox elements in the Java code. Why do you need to bind them?