[xep-support] Trace output during rendering

[David Tolpin]

> 
> Hi David,
> 
> I have read paragraph #4 several times but I don't understand how to attach
> the custom document handler to the logger.
> This is what I have tried:

Eric,

my apologies, this is a bug in Driver.java. Method render(), when
called with three arguments, sets the handler to the default handler.
Calling it with four arguments does what you need.

render(parser,source,printer,new cusHandler());

or 

EventLogger.logger().setDocumentHandler(new cusHandler());
render(parser,source,printer,EventLogger.logger());

will set the handler correctly.

Please also not that the logger is bound to the current thread,
thus in a multithreaded application the handler must be set
in each thread.

Additionally, I'll send you a fixed version of Driver.java off-list.
A maintenance release will follow soon.

The interfaces will be changed from SAX1 to SAX2 in the next major release.

David Tolpin
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