Java Reference
In-Depth Information
A
Renderer
is a helper to the
UIComponent
that deals with how that specific
UIComponent
class should appear in a specific kind of client device. Like components,
renderers are identified by two names:
render-kit-id
and
renderer-type
. A
render kit is just a bucket into which a particular group of renderers is placed, and
the
render-kit-id
identifies the group. Most JavaServer Faces component libraries
provide their own render kits.
A
javax.faces.view.facelets.Tag
object is a helper to the
UIComponent
and
Renderer
that allows the page author to include an instance of a
UIComponent
in
a JavaServer Faces view. A tag represents a specific combination of
component-type
and
renderer-type
.
See “
Component, Renderer, and Tag Combinations
”
on page
99
for information on how
components, renderers, and tags interact.
This chapter uses the image map component from the Duke's Bookstore case study ex-
ample to explain how you can create simple custom components, custom renderers, and
associated custom tags, and take care of all the other details associated with using the com-
ponents and renderers in an application. See
Chapter 25
,
“
Duke's Bookstore Case Study
The chapter also describes how to create other custom objects: custom converters, custom
listeners, and custom validators. It also describes how to bind component values and in-
stances to data objects and how to bind custom objects to managed bean properties.
The following topics are addressed here:
• “
Understanding the Image Map Example
”
on page
100
• “
Steps for Creating a Custom Component
”
on page
105
• “
Creating Custom Component Classes
”
on page
106
• “
Delegating Rendering to a Renderer
”
on page
114
• “
Implementing an Event Listener
”
on page
117
• “
Handling Events for Custom Components
” on page
119
• “
Using a Custom Component
” on page
121
• “
Creating and Using a Custom Converter
”
on page
123
• “
Creating and Using a Custom Validator
”
on page
128
