Java Reference
In-Depth Information
</attribute>
</validator>
Attributes specified in a
validator
tag override any settings in the
@FacesValid-
ator
annotation.
The
validator-id
and
validator-class
elements are required subelements. The
validator-id
element represents the identifier under which the
Validator
class
should be registered. This ID is used by the tag class corresponding to the custom
val-
idator
tag.
The
validator-class
element represents the fully qualified class name of the
Val-
idator
class.
The
attribute
element identifies an attribute associated with the
Validator
imple-
mentation. It has required
attribute-name
and
attribute-class
subelements.
The
attribute-name
element refers to the name of the attribute as it appears in the
validator
tag. The
attribute-class
element identifies the Java type of the value
associated with the attribute.
“
Creating and Using a Custom Validator
”
on page
128
explains how to implement the
Validator
interface.
“
Using a Custom Validator
” on page
132
explains how to reference the validator from the
page.
Registering a Custom Converter
As is the case with a custom validator, if the application developer creates a custom con-
verter, you must register it with the application either by using the
@FacesConvert-
er
annotation, as described in
“
Creating a Custom Converter
” on page
123
,
or by using
the
converter
XML element in the application configuration resource file. Here is a
hypothetical
converter
configuration for
CreditCardConverter
from the Duke's
Bookstore case study:
<converter>
<description>
Converter for credit card numbers that normalizes
the input to a standard format
</description>
<converter-id>CreditCardConverter</converter-id>
<converter-class>
