Extension elements/functions: how to get context?

[Angus McIntyre <an...@pobox.com>]

I'm currently writing a Java application that uses Xalan to transform 
XML+XSLT to HTML. I'd like the application to do on-the-fly link 
checking and re-referencing for any links in the final HTML document.

It currently looks like the best way for me to do that is using an 
extension, which will be invoked where appropriate by a stylesheet 
template. To handle the links appropriately, I need to know the path 
to the source and destination documents (ideally I'd also like to 
have access to the Java application class that is running the whole 
show, as that has the necessary smarts to do the operation).

So the question is: what's the best way to get that information from 
within an extension function? Extension elements seem to get some 
kind of processor context which, if I subclassed the transformer 
appropriately, might presumably get me back to the parent 
application. But it's not clear to me from the doc how to get the 
same kind of contextual information from within an extension function.

Suggestions or pointers to relevant source code would be much 
appreciated. Thanks in advance

	Angus
-- 
angus@pobox.com                             http://pobox.com/~angus