Martin: Created page with "Brings swing like programming to the web: * set of UI components * event driven * component model (ability to extend) ** buttons, tables, input, tree handling JSF input exa..."

2021-09-14T21:31:24Z

Created page with "Brings swing like programming to the web: * set of UI components * event driven * component model (ability to extend) ** buttons, tables, input, tree handling JSF input exa..."

New page

Brings swing like programming to the web:
* set of UI components
* event driven
* component model (ability to extend)
** buttons, tables, input, tree handling

[[JSF input example]]

* Beans are used to communicate between the interface and application
* JSF pages can be .jsp or .jsf the url convention is .faces (with mapping) (jsf require more configuration)
* Can use normal jsp or XML version

* Note handles (legitimate) beans that don't have both getters and setters

Can call methods, set parameters:

<pre>
<jhtml:inputText value="#{user.name}"/>
<jhtml:commandButton value="Submit" action="#{foo.doStuff}"/>
</pre>

Has support for:
* Validation
* Data conversion
* Internationalisation
* Custom components
* Different clients e.g. wml

== Processing ==
* "Restore View" - retrieves new values, creates component tree for processing (component for each bean/action class)
* "Apply Request Values" - each bean component processes it's values
* "Process Events" - adds action to list for each event button/link
* "Process Validations" - type conversion etc
** skips to "Render Response" on error for data re-entry - redisplays data entry page - need to display error to indicate why
* "Update Model Values" - applies the new values to the beans
* "Invoke Application" - invokes the list of actions
** result is a string passed to the navigation handler - used to look up next page
* "Render Response"

Beans
* backing beans - beans tying behaviour to interface form
* public no arg constructor

Notation:
* ${..} immediate evaluation - on processing the page - typically JSP/JSLT
* #{..} deferred evaluation - evaluated whenever needed - typically JSF

JSF - Revision history

Martin: Created page with "Brings swing like programming to the web: * set of UI components * event driven * component model (ability to extend) ** buttons, tables, input, tree handling JSF input exa..."