Examples with NavigationHandler com.vaadin.flow.router.NavigationHandler used on opensource projects

Example 1 with NavigationHandler

use of com.vaadin.flow.router.NavigationHandler in project flow by vaadin.

the class LocationChangeEventTest method removeRerouteTarget.

@Test
public void removeRerouteTarget() {
    NavigationHandler handler = e -> 200;
    event.rerouteTo(handler);
    Assert.assertTrue(event.getRerouteTarget().isPresent());
    event.rerouteTo((NavigationHandler) null);
    Assert.assertFalse(event.getRerouteTarget().isPresent());
}

Example 2 with NavigationHandler

use of com.vaadin.flow.router.NavigationHandler in project flow by vaadin.

the class RouterConfigurationTest method routeMatches.

private static boolean routeMatches(String location, String route) {
    RouterConfiguration configuration = createConfiguration();
    configuration.setRoute(route, createNoopHandler());
    Optional<NavigationHandler> resolveRoute = configuration.resolveRoute(new Location(location));
    return resolveRoute.isPresent();
}

Example 3 with NavigationHandler

use of com.vaadin.flow.router.NavigationHandler in project flow by vaadin.

the class RouterConfigurationTest method testRemoveRoutes.

@Test
public void testRemoveRoutes() {
    RouterConfiguration configuration = createConfiguration();
    NavigationHandler navigationHandler = createNoopHandler();
    configuration.setRoute("foo", navigationHandler);
    configuration.setRoute("{name}", navigationHandler);
    configuration.setRoute("*", navigationHandler);
    configuration.removeRoute("foo");
    Assert.assertNotNull(configuration.resolveRoute(new Location("foo")));
    configuration.removeRoute("{otherName}");
    Assert.assertNotNull(configuration.resolveRoute(new Location("foo")));
    configuration.removeRoute("*");
    // Should resolve to empty optional only after removing all the routes
    Assert.assertFalse(configuration.resolveRoute(new Location("foo")).isPresent());
}

Example 4 with NavigationHandler

use of com.vaadin.flow.router.NavigationHandler in project flow by vaadin.

the class ViewRenderer method handle.

@Override
public int handle(NavigationEvent event) {
    UI ui = event.getUI();
    Class<? extends View> viewType = getViewType(event);
    List<Class<? extends HasChildView>> parentViewTypes = getParentViewTypes(event, viewType);
    assert viewType != null;
    assert parentViewTypes != null;
    checkDuplicates(viewType, parentViewTypes);
    View viewInstance = getView(viewType, event);
    List<View> viewChain = new ArrayList<>();
    viewChain.add(viewInstance);
    for (Class<? extends HasChildView> parentType : parentViewTypes) {
        viewChain.add(getView(parentType, event));
    }
    LocationChangeEvent locationChangeEvent = createEvent(event, viewChain);
    // Notify view and parent views about the new location
    for (View view : viewChain) {
        view.onLocationChange(locationChangeEvent);
        // Use the new navigation handler if a reroute target was set
        Optional<NavigationHandler> rerouteTarget = locationChangeEvent.getRerouteTarget();
        if (rerouteTarget.isPresent()) {
            return rerouteTarget.get().handle(event);
        }
    }
    @SuppressWarnings("unchecked") List<HasChildView> parentViews = (List<HasChildView>) (List<?>) viewChain.subList(1, viewChain.size());
    // Show the new view and parent views
    ui.getInternals().showView(event.getLocation(), viewInstance, parentViews);
    updatePageTitle(event, locationChangeEvent);
    return locationChangeEvent.getStatusCode();
}

Example 5 with NavigationHandler

use of com.vaadin.flow.router.NavigationHandler in project flow by vaadin.

the class Router method navigate.

/**
 * Navigates the given UI to the given location.
 *
 * @param ui
 *            the UI to update, not <code>null</code>
 * @param location
 *            the location to navigate to, not <code>null</code>
 * @param trigger
 *            the type of user action that triggered this navigation, not
 *            <code>null</code>
 * @return the HTTP status code resulting from the navigation
 */
@Override
public int navigate(UI ui, Location location, NavigationTrigger trigger) {
    assert ui != null;
    assert location != null;
    assert trigger != null;
    // Read volatile field only once per navigation
    ImmutableRouterConfiguration currentConfig = configuration;
    assert currentConfig.isConfigured();
    NavigationEvent navigationEvent = new NavigationEvent(this, location, ui, trigger);
    Optional<NavigationHandler> handler = currentConfig.getResolver().resolve(navigationEvent);
    if (!handler.isPresent()) {
        handler = currentConfig.resolveRoute(location);
    }
    // location but there is a mapping for the other
    if (!handler.isPresent() && !location.getPath().isEmpty()) {
        Location toggledLocation = location.toggleTrailingSlash();
        Optional<NavigationHandler> toggledHandler = currentConfig.resolveRoute(toggledLocation);
        if (toggledHandler.isPresent()) {
            handler = Optional.of(new InternalRedirectHandler(toggledLocation));
        }
    }
    if (!handler.isPresent()) {
        NavigationHandler errorHandler = currentConfig.getErrorHandler();
        handler = Optional.of(errorHandler);
    }
    return handler.get().handle(navigationEvent);
}