THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
Page History
...
MyFaces
...
Commons
...
Converters
...
contains
...
some
...
useful
...
converters
...
not
...
provided
...
by
...
the
...
spec,
...
and
...
a
...
base
...
class
...
for
...
create
...
custom
...
converters
...
using
...
myfaces-builder-plugin.
...
This
...
base
...
class
...
(
...
org.apache.myfaces.commons.converter.ConverterBase
...
)
...
allow
...
use
...
ValueExpressions
...
and
...
in
...
2.0
...
version
...
provides
...
an
...
implementation
...
of
...
StateHelper.
...
This
...
is
...
useful
...
in
...
cases
...
where
...
parameters
...
for
...
the
...
converter
...
are
...
bound
...
to
...
ValueExpression
...
instance
...
that
...
are
...
evaluated
...
at
...
runtime.
...
By
...
default,
...
converter
...
parameters
...
are
...
evaluated
...
on
...
build
...
time
...
(the
...
first
...
time
...
the
...
view
...
is
...
built),
...
so
...
they
...
cannot
...
change
...
over
...
the
...
time
...
(further
...
web
...
postback
...
requests).
...
To
...
understand
...
this,
...
take
...
a
...
look
...
at
...
this
...
example:
| Code Block | ||||
|---|---|---|---|---|
| ||||
{code:xml} <h:form id="form1"> <h:messages showDetail="false" showSummary="true" ></h:messages> <h:panelGrid columns="3"> <h:outputLabel for="type" value="Insert a type" /> <h:selectOneMenu id="type" immediate="true" value="#{numberBean.type}" > <f:selectItem itemLabel="number" itemValue="number"/> <f:selectItem itemLabel="currency" itemValue="currency"/> <f:selectItem itemLabel="percent" itemValue="percent"/> </h:selectOneMenu> <h:message for="type" styleClass="error" /> <h:outputLabel for="number1" value="Insert a number" /> <h:inputText id="number1" value="#{numberBean.numberMap['number1']}" required="true"> <mcc:convertNumber destType="java.lang.Double" type="#{mc:findComponent('form1:type').value}"/> </h:inputText> <h:message for="number1" styleClass="error" /> <h:commandButton id="validateButton" value="#{example_messages['button_submit']}" action="#{numberBean.submit}" /> </h:panelGrid> </h:form> {code} |
It
...
is
...
a
...
h:selectOneMenu
...
that
...
allows
...
you
...
to
...
choose
...
a
...
type
...
that
...
is
...
then
...
read
...
by
...
a
...
converter.
...
This
...
can't
...
work
...
with
...
f:convertNumber,
...
because
...
the
...
ValueExpression
...
on
...
type
...
is
...
evaluated
...
at
...
build
...
time.
...
But
...
in
...
this
...
case,
...
mcc:convertNumber
...
evaluate
...
them
...
each
...
time
...
the
...
conversion
...
occur.
...
Note
...
the
...
immediate="true"
...
in
...
h:selectOneMenu
...
makes
...
the
...
value
...
of
...
the
...
component
...
be
...
evaluated
...
before
...
the
...
conversion
...
over
...
the
...
input
...
text.
...
Also,
...
in
...
this
...
project
...
you
...
can
...
found:
...
- mcc:convertBoolean
...
- :
...
- Simple
...
- true/false
...
- converter
...
- with
...
- alternate
...
- representations
...
- of
...
- true
...
- false
...
- (yes/no),
...
- (1/0),
...
- and
...
- (way/no
...
- way).
...
- mcc:convertDateTime
...
- :
...
- Simple
...
- convert
...
- that
...
- overrides
...
- the
...
- spec
...
- DateTimeConverter
...
- and
...
- uses
...
- TimeZone.getDefault()
...
- as
...
- the
...
- base
...
- timezone,
...
- rather
...
- than
...
- GMT.
...
- Convert
...
- date
...
- time
...
- using
...
- normal
...
- system
...
- timezone
...
- like
...
- it
...
- should.
...
- In
...
- JSF
...
- 2.0
...
- a
...
- new
...
- param
...
- for
...
- enable
...
- this
...
- behavior
...
- for
...
- f:convertDateTime
...
- was
...
- created
...
- called
...
- javax.faces.DATETIMECONVERTER_DEFAULT_TIMEZONE_IS_SYSTEM_TIMEZONE.
...
- mcc:convertEnum
...
- :
...
- Alternate
...
- enum
...
- converter.
...
- mcc:convertNumber
...
- :
...
- Converter
...
- which
...
- uses
...
- either
...
- the
...
- manually
...
- set
...
- destType
...
- or
...
- the
...
- value
...
- binding
...
- to
...
- determine
...
- the
...
- correct
...
- destination
...
- type
...
- to
...
- convert
...
- the
...
- number
...
- to
...
- This
...
- tag
...
- creates
...
- a
...
- number
...
- formatting
...
- converter
...
- and
...
- associates
...
- it
...
- with
...
- the
...
- nearest
...
- parent
...
- UIComponent.
...
- It
...
- uses
...
- either
...
- the
...
- manually
...
- set
...
- destType
...
- or
...
- the
...
- value
...
- binding
...
- to
...
- determine
...
- the
...
- correct
...
- destination
...
- type
...
- to
...
- convert
...
- the
...
- number
...
- to.
...
Overview
Content Tools
Apps