John Yu wrote:
>
> It would be useful to have an 'alt' attribute on <bean:message> tag. eg.
>
> <bean:message key="blah" alt="DefaultLabel"/>
>
> There are two uses:
>
> * In case Struts fails to find the message/resource, it can display the default
>label (and display a warning on the console).
> * For design-time tools (eg. Dreamweaver), it will be easier for the tools to
>display some meaningful mock-up labels at design-time.
>
> Similarly, for <bean:write>, we can have
>
> <bean:write name="blah" property="blah" mock="MockLabel"/>
>
> What do you think?
This is the approach taken in the <expr> tag of JSPTL.
(http://jakarta.apache.org/taglibs/doc/jsptl-doc/jsptl-ea1/ExpressionTags_FunctionalDescription_1_EA1.html)
The default value can be specified either via attribute default:
<jx:expr value="$customer.address.city" default="unknown address"/>
or within the body of the tag:
<jx:expr value="$customer.address.city">
<acme:defaultCity/>
</jx:expr>
-- Pierre
