Data-Centric Applications with Vaadin 8

Coding authorization with the help of a Navigator

You might have heard about the Navigator class in Vaadin Framework. In short, the Navigator class allows you to pair URI fragments with UI components. When the fragment part changes in the browser, the associated UI component is rendered. It also allows you to programmatically navigate to a specific UI component by specifying its associated fragment. For example:

public class VaadinUI extends UI { 
    @Override 
    protected void init(VaadinRequest vaadinRequest) { 
        Navigator navigator = new Navigator(this, this); 
         
        navigator.addView("view1", new View1()); 
        navigator.addView("view2", new View2()); 
    } 
} 

When you create a Navigator, you specify the UI to which the Navigator is attached and a ComponentContainer ...