The row key or row index of a UIXCollection component is being changed outside of the components context ????

Question

Hello Guys,
I'm working at this moment on implementing GANTT functionality via the <dvt:projectGantt> in my Web App :
Rather than using data binding technology, I use a managed bean in this way :
@ManagedBean(name="myBeanController")
@ViewScope
public class MyBeanController implements Serializable{
private List<InternalTask> internalTasks;
@EJB
private InternalTaskDao internalTaskDao;
//Root for tree component
private List<TreeNode> root;
private transient TreeModel model;
public MyBeanController(){
     this.internalTasks = new ArrayList<InternalTask>();
@PostConstruct
public void init(){
     //Here I construct my TreeModel
     this.model = new ChildPropertyTreeModel(root,"collection");
//getters and setters
And my Component in my JSF page would be :
<dvt:gantt value="#{myBeanController.model}></...>
In my Browser the component seems to work properly without any problems but if I expand each node then I can see in my log :
"<org.apache.myfaces.trinidad.component.UIXCollection> <BEA-000000> <The row key or row index of a UIXCollection component is being changed
outside of the components context. Changing the key or index of a collection when the collection
is not currently being visited, invoked on, broadcasting an event or processing a lifecycle method, is not valid.
Data corruption and errors may result from this call...>"
What's going on here ? Something with rowKeySet ?
Thanks,
Remy

Answer 1

Hi,
I made my tree model variable non transient and the warning message appears again.
I implement the gantt in the same way as you did in the demo
1st) populate ArrayList (As far as I'm concerned, it's populated via @EJB)
2nd) create TreeModel with a helper class as in the demo which extends ChildPropertyTreeModel and implements TaskKey
In my browser all the stuff is running fine except this warning message.
I use for info JDev 12c
Thanks,