[C2] XT transformer

[Sebastien Sahuc <ss...@imediation.com>]

As Giacomo suggested so well :-) attached you'll find the 
XTTransformer.java

The lib used is the latest one from James Clark site :
http://www.jclark.com/xml/xt.html

the distrib is available directly at :
ftp://ftp.jclark.com/pub/xml/xt.zip

The XTTransformer make use of the "store" component to cache the 
StyleSheet. And the code is mainly a copy/paste from two classes defined 
in XT (XSLProcessorImpl and XMLProcessorImpl) package since they cannot 
be extended because of private fields (Eric van der Vlist helped me in 
this task).

Xt needs a SAX 1 parser, so I use JAXP classes (SAXParserFactory, 
SAXParser classes) to get one.

You can notice a improvement in term of performance when compared to the 
current XalanFilter simply because Xalanfilter doesn't yet cache the 
StyleSheet, thus reparsing the whole XSL file at every hit.

All the best,

Sebastien