public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object arg2)
throws Exception
{
HttpSession session = request.getSession(true);
NavigationModel navigationModel = (NavigationModel)session.getAttribute(NavigationModel.NAVIGATION_MODEL_KEY);
Server server = (Server)session.getAttribute(SessionKeys.SERVER_KEY);
RepositoryInfo repoInfo = (RepositoryInfo)session.getAttribute(SessionKeys.REPOSITORY_INFO_KEY);
navigationModel.getGroup("server").getView("overview").setEnabled(server != null);
navigationModel.getGroup("repository").setEnabled(server != null && repoInfo != null);
navigationModel.getGroup("repository").getGroup("modify").setEnabled(repoInfo != null && repoInfo.isWritable());
navigationModel.getGroup("repository").getGroup("query").setEnabled(repoInfo != null && repoInfo.isReadable());
navigationModel.getGroup("repository").getGroup("explore").setEnabled(repoInfo != null && repoInfo.isReadable());
navigationModel.getGroup("repository").getGroup("extract").setEnabled(repoInfo != null && repoInfo.isReadable());
return true;
}