RE: Clay - how to set locale Parameter for f:view in html/xml views

[Gary VanMatre <gv...@apache.org>]

>Still need to create the issue - but i've got an idea for a workaround.
>How about a viewhandler, which uses a custom session bean which holds
>the locale - and which return this one when "calculateLocale" is called?
>
>Something like this:
>
>public Locale calculateLocale(FacesContext facesContext) {
>    LanguageBean neededBean
>        = (LanguageBean) facesContext.getApplication()
>          .getVariableResolver().resolveVariable(facesContext,
>"language");
>    if(neededBean != null) {
>      log.info("current locale -> " + neededBean.getCurrentLanguage());
>      return neededBean.getCurrentLocale();
>    }
>    log.info("current locale -> " + base.calculateLocale(facesContext));
> ; ;    return base.calculateLocale(facesContext);
>  }
>
>Any drawbacks of this workaround?
>

I don't see a reason why this solution wouldn't work but I really think that 
the locale should be defined per page.  To make this work, the locale would 
have to be applied to the view root before rendering.

I was thinking about a new category of Clay component definitions.  A 
"action" type that would let you invoke method binding expressions.  Before 
the sub component tree was built by the Clay component, it would walk thru 
the graph of config beans and invoke any "action" types.  The action types 
would be ignored otherwise.  Maybe we could extend the clay metadata adding 
method binding info so that all components could have it.

Maybe something like this:

<component jsfid="myField" extends="h:outputText" >
     <actions>
         <method-expression value="#{@managed-bean-name.viewSetup}"
                                         formalParameter="void 
(javax.faces.component.UIViewRoot) "
                                         actualParameter="#{facesContext.view}" 
/>
         --- or --

         <method-expression value="#{@managed-bean-name.prerender}"
                                         formalParameter="void 
(javax.faces.component.UIViewRoot, 
org.apache.shale.clay.config.beans.ComponentBean) "
                                         actualParameter="#{facesContext.view}, 
#{this}" />
    </actions>


What do you think?

>Torsten

Gary