Problem with tree:nodeSelectListener

[bolsover]

I'm having a problem setting a NodeSelectListener on a dynamically built HtmlTree.

Heres my code:
JSF:

<rich:panel style="width: 900px">
 <h:form>
 <h:panelGrid columns="5">
 <rich:tree binding="#{NavigationListBean.tree1}" ></rich:tree>
 <%-- other trees --%>
 </h:panelGrid>
 </h:form>
</rich:panel>

JAVA:

public HtmlTree getTree1() {
 return buildTree(1);
 }

 private HtmlTree buildTree(int menuNo) {
 HtmlTree tree = new HtmlTree();
 NavigationDao dao = new NavigationDao();
 Navigation top = dao.retrieveActiveTopLevelNavigationsBySeq(menuNo);
 TreeNodeImpl rootNode = new TreeNodeImpl();

 tree.setAjaxKeys(null);
 tree.setAjaxSubmitSelection(true);
 tree.setSwitchType("client");
 tree.setPreserveModel("true");
 tree.setStyle("width:150px");

 MethodBinding binding =
 AppUtils.getCurrentApplication().createMethodBinding("#{NavigationListBean.processSelection}",
 new Class[] { NodeSelectedEvent.class });

 tree.setNodeSelectListener(binding);
 rootNode.setData(top.getSeq());

 TreeNodeImpl childNode = new TreeNodeImpl();

 childNode.setData(top.getMenu());
 rootNode.addChild(top, childNode);

 List<Navigation> treeNavigations = dao.retrieveActiveNavigationsByParentMenu(top.getMenu());

 walkTree(childNode, treeNavigations);
 tree.setValue(rootNode);

 return tree;
 }

 private void walkTree(TreeNode parentNode, List<Navigation> treeNavigations) {
 NavigationDao dao = new NavigationDao();
 TreeNodeImpl childNode;

 for (Navigation nav : treeNavigations) {
 childNode = new TreeNodeImpl();
 childNode.setData(nav.getMenu());
 parentNode.addChild(nav, childNode);

 List<Navigation> childNavigations = dao.retrieveActiveNavigationsByParentMenu(nav.getMenu());

 walkTree(childNode, childNavigations);
 }
 }

 public void processSelection(NodeSelectedEvent event) {
 // this method never called

 HtmlTree tree = (HtmlTree) event.getComponent();
 Navigation selectedNavigation = (Navigation) tree.getRowData();

 System.out.println(selectedNavigation.toString());
 }

The trees are displayed on page just fine - but the processSelection(NodeSelectedEvent) is never called -- any help please?

[mnott]

Did you ever get an answer? It works fine for me in JBoss, but in Tomcat 5.5, it doesn't fire the method.

Thanks!

M

[bolsover]

Hi Matthias

I did not get a solution via the forum - but I did solve the problem...

The problem and solution lies in the lines:

rootNode.addChild(top, childNode);
and

parentNode.addChild(nav, childNode);

where the objects top and nav in my code were instances of a POJO: Navigation.

The method signature is:

public void addChild(Object o, TreeNode<T> tn)

However, it appears that setting any moderately complex Object o will cause problems (at least in Tomcat which is my deployment environment)

In this situation now, I use code like rootNode.addChild(""+counter++, childNode); where int counter is initialzed to 0 outside the recursive loop.

Having got a solution I never investigated the problem further - but it would be nice to know what the problem really is.

David

[mnott]

Thanks for sharing your solution. I had a much more simple problem: I had set <h:form prependId="false"> for historic reasons, and that was why the whole thing broke. Removing the prependId="false" solved this problem.

Tnx,

M