ClassNotFoundException while invoking EL function during render response

Question

I wrote a simple EL function to retrieve the clientId of a UIComponentBase object -- I'm generating some javascript. The first time I load the page (without a submit), the page generates just fine, including the javascript output that successfully invoked my EL function from a h:outputText element.
However, when I submit the form it throws a ClassNotFoundException (for my EL function class) and generally freaks out after that. Now, obviously it should be able to find the class since it managed to find it on the initial rendering of the page.
Am I missing something about using EL functions in a JSF tag? (I'm using JBoss Seam under the covers, but am not sure if this is a Seam issue or a pure-JSF issue.) Thanks for any light you folks can shed on this.

Answer 1

The Faces Context is set up by the Faces Servlet, which hasn't run yet in a filter.
I haven't tried it, but [url http://blog.lightwaysoftware.com/2010/10/accessing-facescontext-from-a-servlet-filter/]this may help you.
DOH! That's what you are doing already.
If you're using JDev 11.1.2.x, you could try [url http://ocpsoft.com/java/jsf-java/jsf-20-extension-development-accessing-facescontext-in-a-filter/]this
John