How to highlight a primefaces tree node from backing bean

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 ........");
 
 }
 

}

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