public void checkAccessRestrictionForRequestedView(Navigator navigator) {
final View targetView = viewProvider.getView(navigator.getState());
if (targetView != null) {
final Collection<ConfigAttribute> attributes =
new SecuredAnnotationSecurityMetadataSource()
.getAttributes(
new SimpleMethodInvocation(
targetView,
ReflectionUtils.findMethod(
View.class, "enter", ViewChangeListener.ViewChangeEvent.class)));
try {
accessDecisionManager.decide(
SecurityContextHolder.getContext().getAuthentication(), targetView, attributes);
} catch (AccessDeniedException adExc) {
// must be ignored as this exception is already handled in the AccessDecisionManager
}
}
}
@Override
protected void init(VaadinRequest request) {
setLocale(Locale.ENGLISH);
// Let's register a custom error handler to make the 'access denied' messages a bit friendlier.
setErrorHandler(
new DefaultErrorHandler() {
@Override
public void error(com.vaadin.server.ErrorEvent event) {
if (SecurityExceptionUtils.isAccessDeniedException(event.getThrowable())) {
Notification.show("Sorry, you don't have access to do that.");
} else {
super.error(event);
}
}
});
VerticalLayout layout = new VerticalLayout();
Panel viewContent = new Panel();
MenuBar menu = new MenuBar();
menu.addStyleName("navigation-menu");
layout.addComponents(menu, viewContent);
layout.setSizeFull();
viewContent.setSizeFull();
layout.setExpandRatio(viewContent, 1);
menu.addItem("Trading Area", e -> onDashboardClicked());
menu.addItem("Users", e -> onCustomersClicked());
navigator = new Navigator(this, viewContent);
springViewProvider.setAccessDeniedViewClass(AccessDeniedView.class);
navigator.addProvider(springViewProvider);
navigator.setErrorView(ErrorView.class);
setContent(layout);
String state = navigator.getState();
if (state != null && !state.isEmpty()) {
navigator.navigateTo(state);
} else {
navigator.navigateTo(TradingAreaView.NAME);
}
}