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From Mike Kienenberger <mkien...@gmail.com>
Subject Re: composite components: optional method-expression-attributes
Date Wed, 27 Oct 2010 19:35:29 GMT
While trying to find a reference to what I wrote about, I came across
this posting.

There's a number of ideas kicked back and forth there, and the one on
using <f:attribute> for your action and actionListener might work for
you.

http://www.icefaces.org/JForum/posts/list/8006.page



On Wed, Oct 27, 2010 at 3:31 PM, Mike Kienenberger <mkienenb@gmail.com> wrote:
> I seem to vaguely recall from the facelets mailing lists long ago that
> you had to sometimes pass method bindings as two separate parameters.
> One for the object, and one for the method name.
>
> "#{object}.#{method}"
>
> Sorry I can't be of more help, but maybe it'll get you going in the
> right direction.
>
>
>
> On Wed, Oct 27, 2010 at 9:42 AM, Thomas Möller
> <thomas.moeller@continentale.de> wrote:
>>
>> Hi,
>>
>> what is the recommended way how to deal with optional attributes that refer
>> to a method expression?
>>
>> For example imagine a simple component that uses a commandLink and has two
>> attributes: "action" and "actionListener":
>>
>> <cc:interface>
>>  <cc:attribute name="action" method-signature="java.lang.String action()"
>> default="???" />
>>  <cc:attribute name="actionListener" method-signature="void
>> actionListener(javax.faces.event.ActionEvent)" default="???" />
>> </cc:interface>
>>
>> <cc:implementation>
>>  <tr:commandLink action="#{cc.attrs.action}"
>> actionListener="#{cc.attrs.actionListener}" />
>> </cc:implementation>
>>
>> My problems:
>> 1) omitting the defaults results in NullPointerExceptions
>> 2) the spec says that a default-attribute must evaluate to a
>> java.lang.String
>>
>> What is the solution for this simple problem?
>>
>> Thanks in advance.
>> --
>> View this message in context: http://old.nabble.com/composite-components%3A-optional-method-expression-attributes-tp30067392p30067392.html
>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>
>>
>

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