How to highlight a primefaces tree node from backing bean - jsf-2

Question

I am working with primefaces tree component. There is a context menu for the tree (add a node, edit node, delete node). After performing some operation, I need to refresh the tree and then highlight the node added or edited.
This is my code.
index.xhtml
<p:treeNode>
<h:outputText value="#{node}" />
</p:treeNode>
</p:tree>
<p:contextMenu for="pTree" id="cmenu">
<p:menuitem value="Add topic as child" update="pTree, cmenu"
actionListener="#{treeBean.addChildNode}" />
<p:menuitem value="Add topic Below" update="pTree, cmenu"
actionListener="#{treeBean.addTopicBelow}" />
<p:menuitem value="Delete Topic" update="pTree, cmenu"
actionListener="#{treeBean.deleteNode}" />
</p:contextMenu>
treeBean.java
public class TreeBean implements Serializable {
private TreeNode root;
public TreeBean() {
root = new DefaultTreeNode("Root", null);
// GET the root nodes first L0
List<TracPojo> rootNodes = SearchDao.getRootNodes111();
Iterator it = rootNodes.iterator();
while (it.hasNext()) {
TracPojo t1 = (TracPojo) it.next();
String tid = t1.getTopicID();
TreeNode node1 = new DefaultTreeNode(t1, root);
}
}
public TreeNode getRoot() {
return root;
}
public void addChildNode(ActionEvent actionEvent)
{
List record = NewSearchDao.getRecord(selectedNode);
Iterator it = record.iterator();
while (it.hasNext()) {
Object[] record1 = (Object[]) it.next();
setParentID_dlg((String) record1[0]);
setSortIndex((Integer) record1[2]);
}
}
public void saveChilddNode() {
System.out.println("Save as Child Node ........");
}
}

Answer 1

Primefaces p:treeNode has an attribute styleClass. You could set this dynamically from your backing bean. The view would look like:
<p:tree>
<p:treeNode styleClass="#{treeBean.styleClass}">
<h:outputText value="#{node}" />
</p:treeNode>
</p:tree>
Then add a member styleClass to your TreeBean with get/set method that returns a string representing the style class:
public class TreeBean implements Serializable {
private String styleClass;
...
public String getStyleClass() {
// your style selection logic here
}
...
}
Don't forget to add the style classes to your css.

Answer 2

Unless you set the selectedNode, which you declare as selection="#{treeBean.selectedNode}", to null, it is already selected and the only thing you have to do is to update the tree component from the triggering component; in your case it is:
<p:menuitem update=":yourForm:pTree" /*rest of the stuff*/ />