Dynamic form fields (JSF + XSLT)

Question

I'm working on a project which I need to build a form depending on user's wish. Trying to explain better, suppose I have two buttons ('input' and 'output' button), if user clicks on input button an inputText appears in the screen, if he/she clicks on output one an outputText shows up. To do that, everytime some button is clicked, my bean build a xml file containing the components. For instance, if user clicks on input then output button I'll have this xml file:

<form>
    <component name='input'/>
    <component name='output'/>
</form>

Ok. Suppose I have an xsl file to allow the transformation to jsf. How can I make this transformation on the fly? I'd like practical aspects of how implement it.

I appreciate any help. Thanks, Paulo S.