ADF Tree Component Iterating through all nodes upon ONE node click...

Question

Hi to all !. My name is Agustin and I live far away... In Cordoba Argentina to be specific !. My doubt would be the following one: I wanted the other day to build a af:tree component and put in the NodeStamp an commandLink with a setActionListener... So as to get the selected Node... In this case, I have category of books... Let say DataBase, Cloud Computing, Web Development and so on... But the misterious thing happens when I click on one node, and the action method in my backing bean is executed one time per each node the Tree has... I notices this coz I made a System.out.println()... My idea would be to detect the user click event so as to update a Table... My code is as follows !...
<af:tree value="#{backManager.listaCategoria}" var="cat"
binding="#{backManager.tree1}" id="tree1">
<f:facet name="nodeStamp">
<h:commandLink binding="#{backManager.outputText1}" action="#{backManager.outputText1_action}" >
<af:setActionListener from="#{cat}" to="#{backManager.selectedItem}" />
<h:outputText value="#{cat.label}"
binding="#{backManager.outputText2}"
id="outputText2"/>
</h:commandLink>
</f:facet>
</af:tree>
and my backing bean is:
public String ejecutarSeleccion()
Categoria cat = (Categoria) this.selectedItem.getValue();
System.out.println("Nombre: " + cat.getNombre());
return null;
This method is the action attribute from the command link !.
the selectedItem is an attribute of the type SelectItem !.
Where I would be making the mistake ?... Or should I implement the thing in a different way ?... Thankx ! :D

Answer 1

Hi,
its strange when you say it executes the action per each node in the tree. One thing tough I would change is to go from h:commandLink to af:commandLink as it allows you to set partialSubmit=true in which case a click on the tree doesn't refresh the whole tree. I then would add an f:attribute tag to the command link
<f:attribute name="cat" value="#{cat.id}"/>
On the command link I had the actionListener property pointing to a managed bean with a method like
public void onTreeNodeAction(ActioneEvent actionEvent){
RichCommandLink link = (RichCommandLink ) actionEvent.getUIComponent();
Object catId = link.getAttributes().get("cat");
// ... cast the catalog id to its type and you are ready to go
Another option would be to use the SelectListener of the tree and don't use a command link at all. You respond to tree node selection similar to here
http://www.oracle.com/technetwork/developer-tools/adf/learnmore/83-bidi-synchronization-tree-form-401841.pdf
Frank