Examples of com.vaadin.navigator.ViewProvider

com.vaadin.navigator.ViewProvider
A provider for view instances that can return pre-registered views or dynamically create new views. If multiple providers are used, {@link #getViewName(String)} of each iscalled (in registration order) until one of them returns a non-null value. The {@link #getView(String)} method of that provider is then used. @author Vaadin Ltd @since 7.0

    public void testBasicNavigation() {
        IMocksControl control = EasyMock.createControl();
        NavigationStateManager manager = control
                .createMock(NavigationStateManager.class);
        ViewDisplay display = control.createMock(ViewDisplay.class);
        ViewProvider provider = control.createMock(ViewProvider.class);
        View view1 = control.createMock(View.class);
        View view2 = control.createMock(View.class);


        // prepare mocks: what to expect
        manager.setNavigator(EasyMock.anyObject(Navigator.class));


        EasyMock.expect(provider.getViewName("test1")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        view1.enter(eventParametersEqual(""));
        display.showView(view1);
        manager.setState("test1");
        EasyMock.expect(manager.getState()).andReturn("test1");


        EasyMock.expect(provider.getViewName("test2/")).andReturn("test2");
        EasyMock.expect(provider.getView("test2")).andReturn(view2);
        EasyMock.expect(manager.getState()).andReturn("test1");
        view2.enter(eventParametersEqual(""));
        display.showView(view2);
        manager.setState("test2");
        EasyMock.expect(manager.getState()).andReturn("test2");


        EasyMock.expect(provider.getViewName("test1/params"))
                .andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("test2");
        view1.enter(eventParametersEqual("params"));
        display.showView(view1);
        manager.setState("test1/params");
        EasyMock.expect(manager.getState()).andReturn("test1/params");

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    public void testMainView() {
        IMocksControl control = EasyMock.createControl();
        NavigationStateManager manager = control
                .createMock(NavigationStateManager.class);
        ViewDisplay display = control.createMock(ViewDisplay.class);
        ViewProvider provider = control.createMock(ViewProvider.class);
        View view1 = control.createMock(View.class);
        View view2 = control.createMock(View.class);


        // prepare mocks: what to expect
        manager.setNavigator(EasyMock.anyObject(Navigator.class));


        EasyMock.expect(provider.getViewName("test2")).andReturn("test2");
        EasyMock.expect(provider.getView("test2")).andReturn(view2);
        EasyMock.expect(manager.getState()).andReturn("view1");
        view2.enter(eventParametersEqual(""));
        display.showView(view2);
        manager.setState("test2");


        EasyMock.expect(provider.getViewName("")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        view1.enter(eventParametersEqual(""));
        display.showView(view1);
        manager.setState("test1");


        EasyMock.expect(provider.getViewName("test1/params"))
                .andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("test2");
        view1.enter(eventParametersEqual("params"));
        display.showView(view1);
        manager.setState("test1/params");

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    public void testListeners() {
        IMocksControl control = EasyMock.createControl();
        NavigationStateManager manager = control
                .createMock(NavigationStateManager.class);
        ViewDisplay display = control.createMock(ViewDisplay.class);
        ViewProvider provider = control.createMock(ViewProvider.class);
        View view1 = control.createMock(View.class);
        View view2 = control.createMock(View.class);
        ViewChangeTestListener listener = new ViewChangeTestListener();


        // create navigator to test
        Navigator navigator = createNavigator(manager, display);


        // prepare mocks: what to expect
        EasyMock.expect(provider.getViewName("test1")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        ViewChangeEvent event1 = new ViewChangeEvent(navigator, null, view1,
                "test1", "");
        listener.addExpectedIsViewChangeAllowed(event1, true);
        EasyMock.expect(manager.getState()).andReturn("");
        view1.enter(eventParametersEqual(""));
        display.showView(view1);
        manager.setState("test1");
        listener.addExpectedNavigatorViewChange(event1);


        EasyMock.expect(provider.getViewName("test2")).andReturn("test2");
        EasyMock.expect(provider.getView("test2")).andReturn(view2);
        ViewChangeEvent event2 = new ViewChangeEvent(navigator, view1, view2,
                "test2", "");
        listener.addExpectedIsViewChangeAllowed(event2, true);
        EasyMock.expect(manager.getState()).andReturn("test1");
        view2.enter(eventParametersEqual(""));

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    public void testBlockNavigation() {
        IMocksControl control = EasyMock.createControl();
        NavigationStateManager manager = control
                .createMock(NavigationStateManager.class);
        ViewDisplay display = control.createMock(ViewDisplay.class);
        ViewProvider provider = control.createMock(ViewProvider.class);
        View view1 = control.createMock(View.class);
        View view2 = control.createMock(View.class);
        ViewChangeTestListener listener1 = new ViewChangeTestListener();
        ViewChangeTestListener listener2 = new ViewChangeTestListener();


        Navigator navigator = createNavigator(manager, display);


        // prepare mocks: what to expect
        // first listener blocks first view change
        EasyMock.expect(provider.getViewName("test1")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        ViewChangeEvent event1 = new ViewChangeEvent(navigator, null, view1,
                "test1", "");
        listener1.addExpectedIsViewChangeAllowed(event1, false);


        // second listener blocks second view change
        EasyMock.expect(provider.getViewName("test1/test")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        ViewChangeEvent event2 = new ViewChangeEvent(navigator, null, view1,
                "test1", "test");
        listener1.addExpectedIsViewChangeAllowed(event2, true);
        listener2.addExpectedIsViewChangeAllowed(event2, false);


        // both listeners allow view change
        EasyMock.expect(provider.getViewName("test1/bar")).andReturn("test1");
        EasyMock.expect(provider.getView("test1")).andReturn(view1);
        EasyMock.expect(manager.getState()).andReturn("");
        ViewChangeEvent event3 = new ViewChangeEvent(navigator, null, view1,
                "test1", "bar");
        listener1.addExpectedIsViewChangeAllowed(event3, true);
        listener2.addExpectedIsViewChangeAllowed(event3, true);
        view1.enter(EasyMock.isA(ViewChangeEvent.class));
        display.showView(view1);
        manager.setState("test1/bar");
        listener1.addExpectedNavigatorViewChange(event3);
        listener2.addExpectedNavigatorViewChange(event3);


        // both listeners allow view change from non-null view
        EasyMock.expect(provider.getViewName("test2")).andReturn("test2");
        EasyMock.expect(provider.getView("test2")).andReturn(view2);
        EasyMock.expect(manager.getState()).andReturn("view1");
        ViewChangeEvent event4 = new ViewChangeEvent(navigator, view1, view2,
                "test2", "");
        listener1.addExpectedIsViewChangeAllowed(event4, true);
        listener2.addExpectedIsViewChangeAllowed(event4, true);

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        View errorView2 = EasyMock.createMock(View.class);
        errorView2.enter(EasyMock.anyObject(ViewChangeEvent.class));
        EasyMock.replay(errorView2);


        ViewProvider errorProvider = EasyMock.createMock(ViewProvider.class);
        EasyMock.expect(errorProvider.getView("doesnotexist2")).andReturn(
                errorView2);
        EasyMock.expect(errorProvider.getViewName("doesnotexist2")).andReturn(
                "doesnotexist2");
        EasyMock.replay(errorProvider);


        navigator.setErrorProvider(errorProvider);
        navigator.navigateTo("doesnotexist2");

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    DatabaseUtil.getSessionFactory(); // Initialize...


    final Navigator navigator = new Navigator(this, getContent());
    setNavigator(navigator);
    
    navigator.addProvider(new ViewProvider()
    {
      private static final long serialVersionUID = -3308179049710571790L;


      @Override
      public String getViewName(String viewAndParameters)

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