At Krysalis Barcode (http://www.krysalis.org/barcode) I have a Xalan extension
which creates barcodes in SVG format . Until recently I've used an
extension function for that. As I was able to create an extension element for
SAXON I wanted to do the same for the Xalan-extension. But here's the problem:
The extension element (like the extension function where it works correctly)
returns a DocumentFragment containing the generated barcode in SVG format. In
the case of the extension element the DocumentFragment is processed by a
TreeWalker which issues start/endDocument() SAX events although it shouldn't
IMO. This behaviour causes Apache FOP to crash with an NPE because more than
one endDocument() SAX event is sent to FOP by Xalan.
I will attach a test case for the bugzilla test directory. Current CVS (HEAD)
and 2.5.1 fail in this test. I will try to find a bugfix but if someone more
intimate with the code beats me to it, so much better.