I just thought of a feature I have often needed in Facelets that perhaps we can weave into the VDL. It would be nice to know if a named template has been defined inside the master template. Consider the following example:<br>
<br>page.xhtml<br><ui:composition template="/WEB-INF/template.xhtml" ...><br> <ui:param name="title" value="VDL Template Page"/><br> <ui:define name="content"><br>
<h:outputText value="Hello World" /><br> </ui:define><br></ui:composition><br><br>template.xhtml<br><html ...><br> <h:head><br> <title>#{not empty title ? title : 'My Site'}</title><br>
</h:head><br> <body><br> <div id="container"><br> <ui:insert name="content"/> <- how do I know if it has been defined?<br> </div><br> </body><br>
</html><br><br>Since the <ui:param> creates a regular variable, I can check whether it is empty or not. But I do not have a way to check if the named template "content" has been defined. Of course, I can nest default content within the <ui:insert>, which is used when the named template is not defined, but there are cases when I simply need to know whether or not it is defined. Could we come up with some way to check if it is defined?<br>
<br>-Dan<br><br>-- <br>Dan Allen<br>Senior Software Engineer, Red Hat | Author of Seam in Action<br><br><a href="http://mojavelinux.com">http://mojavelinux.com</a><br><a href="http://mojavelinux.com/seaminaction">http://mojavelinux.com/seaminaction</a><br>
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