April 2004
Intermediate to advanced
606 pages
20h 4m
English
Content preview from JavaServer Faces
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A Renderer for Encoding and Decoding
To customize the way the value for an
input component
is entered, we must develop a custom renderer that implements the
decoding behavior in addition to the encoding behavior. An example is
a custom renderer for the UIInput component that
lets the user pick a date by selecting the year, month, and day from
three selection lists, as shown in Figure 13-2.
 |
Figure 13-2. Date selection lists rendered by a custom renderer for an input component
Because the date value is rendered as three selection lists,
it’s sent to the server as three separate
parameters. The custom renderer reads all three and creates a single
java.util.Date value that the input component can
handle.
Before we dig into the code, let’s see how the custom renderer can be used. Example 13-2 shows the JSP page using the custom action element that ties together the custom renderer and the input component.
Example 13-2. Using the date picker (custom/datePicker.jsp)
<%@ page contentType="text/html" %> <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %> <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %> <%@ taglib uri="http://mycompany.com/jsftaglib" prefix="my" %> <jsp:useBean id="now" scope="request" class="java.util.Date" /> <f:view> <html> <body> <h:form> <my:inputDatePicker value="#{myDate}" startYear="#{now.year + 1900 - 2}" years="10" /> <h:outputText value="#{myDate}" ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.