<ui:param name="userCase" value="229501"/>

FaceletContext faceletContext = (FaceletContext) FacesContext.getAttributes().get(FaceletContext.FACELET_CONTEXT_KEY);
if (faceletContext != null) {
    String userCase = (String) faceletContext.getAttribute("userCase");
    // check permission
    if (!hasPermission(userCase)) {
        // redirect
        NavigationHandler nh = facesContext.getApplication().getNavigationHandler();
        nh.handleNavigation(facesContext, null, url);
        facesContext.renderResponse();
    }
}

<context-param>
    <param-name>javax.faces.FACELETS_BUFFER_SIZE</param-name>
    <param-value>65535</param-value><!-- 64KB -->
</context-param>

<c:set var = "userCase" value = "229501" scope = "request" />