EL enhancement of parameters working?

[dandiodati]

Hi was trying out the s:link tag and noticed that it did not support actionListener events(By the way will this be supported?) So I noticed that
you can pass parameters to methods since seam adds some enhancements to
EL. When trying it I end up getting a null parameter passed into my getAction method. Here is the code segment:

<c:forEach items="#{TopNavViewHelper.navBar}" var="item">
 <c:set var="navItemStyle" value=""/>
 <c:if test="#{item.name == TopNavViewHelper.selectedName}">
 <c:set var="navItemStyle" value="selected"/>
 </c:if>

 <li class="#{navItemStyle}" id="#{item.name}" >
 <s:link id="#{item.name}" title="#{item.descr}" action="#{TopNavViewHelper.getAction(item.name)}" actionListener="#{TopNavViewHelper.clicked}"><span>#{item.label}</span>
 </s:link>
 <div>
 <ul/>
 </div>
 </li>
</c:forEach>

The item.name in the getAction method call ends up being null instead
of have the name of the item. Does this not work within forEach loops?

[norman.richards]

It's my understanding, that this is just a limitation of the EL enhancements. The parameters are evaluated outside of the loop and does not have access to the context of a particular iteration of the look. I think you are stuck passing in the value as a request parameter.

[dandiodati]

So this is true even when using facelets?

So I have to access the parameters passed via the FacesContext.getCurrentInstance().getExternalContext().
getRequestParameterMap().get(...


Why doesn't this tag support actionListeners?

I was hoping to change all commandLinks to use this link tag.

[norman.richards]

You can access request parameters using @RequestParameter.

You can also access request parameters from the EL:

<s:link action="#{bean.action(param.myData)}" value="now">
 <f:param name="myData" value="#{item.someValue}" />
</s:link>

However, you obviously can't pass whole objects this way - just simple values.

[spambob]

I was wondering myself too some days ago why one can't use actionListeners with s:link & s:button.

Is there a reason for this? If no could it please be added?! ;)

[norman.richards]

http://jira.jboss.com/jira/browse/JBSEAM-629