How do I show the display names of portal pages in catalog.jsp? I am unable to access portalNode in this page...the code is as follows...

<%
String output = new String();
PortalNode currentNode = request.getPortalNode();
for (Iterator i = parents.keySet().iterator(); i.hasNext();)
{
String name = (String)i.next();
PortalNodeURL nodeURL = (PortalNodeURL)parents.get(name);
output = "<a href=\"" + nodeURL.toString() + "\">" + name + " &gt; " + output;
}
output += parent;
%>


Here, parents is the hashMap containing portal name as key.
How do I get the portalNode so that I can use the getDisplayName() method to show display names instead of page names using variable 'output'?