​protected void doView(RenderRequest request, RenderResponse response) throws PortletException, IOException {
​
​PortalRequest portalRequest = PortalRequest.getInstance();
​
​Navigation navigation = PortalRequest.getInstance().getNavigation();
​        
​// Diving two levels so the information about children count of children nodes is available
​Node rootNode = navigation.getRootNode(Nodes.visitNodes(2));
​navigationRootNodeBean = new NavigationNodeBean(rootNode);
​
​List<NavigationNodeBean> rootNodeChildrenList = navigationRootNodeBean.getChildren();
​ 
​/* Setting the 1st node to be active when accesing the root node "/" */
​if (!rootNodeChildrenList.isEmpty() && portalRequest.getNodePath().equals(NodePath.root())) {
​    navigationRootNodeBean.setFirstActive();
​}
​ 
​request.setAttribute("navigationRootNode", navigationRootNodeBean);
​ 
​PortletRequestDispatcher prd = getPortletContext().getRequestDispatcher("/jsp/navigation.jsp");
​prd.include(request, response);
​     }

​public void serveResource(ResourceRequest request, ResourceResponse response) throws PortletException, IOException {
​ 
​Navigation navigation = PortalRequest.getInstance().getNavigation();
​
​String chosenNodeURI = request.getParameter("uri");
​ 
​Node chosenNode = navigation.getNode(NodePath.fromString(chosenNodeURI), Nodes.visitNodes(2));
​
​request.setAttribute("parentNode", new NavigationNodeBean(chosenNode));
​ 
​PortletRequestDispatcher prd = getPortletContext().getRequestDispatcher("/jsp/node.jsp");
​prd.include(request, response);
​     }

​<div id="id<portlet:namespace/>_gtnQuickstartNavigationPortlet" class="gtnQuickstartNavigationPortlet ">    
​    <%-- Render the main menu, if nodes are available --%>
​    <c:if test="${fn:length(navigationRootNode.children) > 0}">
​        <c:set var="parentNode" value="${navigationRootNode}" scope="request" />
​        <c:set var="menuType" value="topmenu" scope="request" />        
​        <jsp:include page="node.jsp" />
​    </c:if>
​</div>

​<ol class="${menuType} collapsibleContent"><!--
​     <c:forEach var="child" items="${parentNode.children}">
​<c:if test="${!child.system}">
​     --><li class="menuitem <c:if test='${child.active}'>active</c:if> <c:if test='${(child.parent) &amp;&amp; (child.page)}'> multilevel</c:if>">        
​     <portlet:resourceURL var="ajaxResourceUrl">
​<portlet:param name="uri" value="${child.path}" />
​     </portlet:resourceURL>
​     <c:choose>
​<%-- Node is a clickable page and contains children nodes --%>
​<c:when test="${child.page &amp;&amp; child.parent}">
​    <a href="${child.URI}"><span>${child.name}</span></a><!--
​    --><a href="#${ajaxResourceUrl}" class="caret menuhandler"><i>${resourceBundle.getString("label.children")}</i></a>
​</c:when>
​<%-- Node is a clickable page but doesn't contain any children nodes --%>
​<c:when test="${child.page &amp;&amp; !child.parent}">
​    <a href="${child.URI}"><span>${child.name}</span></a>
​</c:when>
​<%-- Node is not a clickable page but contains children nodes, it's a "category" node --%>
​<c:when test="${!child.page &amp;&amp; child.parent}">
​    <a href="#${ajaxResourceUrl}" class="menuhandler"><span>${child.name}</span><i class="caret">${resourceBundle.getString("label.children")}</i></a>
​</c:when>
​<%-- Do nothing with non-clickable "category" nodes without children nodes --%>
​<c:otherwise>
​    <span>${child.name}</span>
​</c:otherwise>
​    </c:choose>
​</li>
​<!--
​</c:if>
​</c:forEach>
​-->
​</ol>

​
​$.ajax({
​    type: "POST",
​    url: $(this).attr('href').substring(1),
​    cache: false,
​    dataType: "text",
​    success: function(data)
​    {
​        menuItem.append(data);
​        openSubmenu(menuItem);
​    },
​    error: function(XMLHttpRequest, textStatus, errorThrown)
​    {
​        console && console.log("Ajax error");
​    }
​});