User's Manual

26 Chapter 5. WAF Component: Presentation
Figure 5-1. Tabbed Pane Using Bebop Components
5.4.1. Working With Bebop
Chapter 12 Presentation (Bebop) Tutorial discusses specifics of implementing Bebop. This section is
a more abstract look into the design and usage of Bebop.
Bebop components follow these guidelines:
• Provide a tree of components; components are also containers.
• Consolidate parameter validation logic and support for custom validators.
• Lock data structures for reuse across requests.
• Automate state preservation and services to allow components to control their own state.
• Multiplex Swing-like events onto the HTTP request.
• For a given request, one component is selected and has control.
• Transforms XML for global style; no HTML in Java strings.
The code in Example 5-2 gives an idea of how Bebop is used.
public void service(HttpServletRequest sreq, HttpServletResponse sresp) {
Page page = new Page("Content Section");
page.add(new Label("Content Section"));