JAXTHelper vs LibXSLTTransformer, which one is preferred?

[Caolán McNamara]

On Thu, 2012-08-30 at 10:10 +0900, mete0r wrote:
> Hi,
> 
> I'm developing an document import filter (which will be packaged as
> an .oxt extension) and it needs to perform XSLT transformations during
> the process of importing (I don't believe xsltfilter could cover these
> process). So I'm finding a way to use XSLT transformation services
> directly.
> 
> In libreoffice 3.5.4, which I'm working with, there seem 2 UNO service,
> i.e., com.sun.star.comp.JAXTHelper and
> com.sun.star.comp.documentconversion.LibXSLTTransformer.
> 
> Currently I'm using the later one (by specifiying its service name in
> the ServiceManager.createInstanceWithContext()), but both are just
> working fine for me. So here are my questions:
> 
> 1. Which one is preferred to be used in regard to forward/backward
> compatibility? It looks like LibXSLTTransformer is introduced later,
> then will JAXTHelper be deprecated at some point in the future?
> 
> 2. Or should I choose one of them conditionally according to the version
> of the Libreoffice installation? If this is the case, from what version
> should I use LibXSLTTransformer?
> 
> 3. Or direct instantiation and use of them like these (not through
> xsltfilter), is unsupported and discouraged way?
> 
> Any guidance or comments would be greatly appreciated.

This isn't an area I know much about, maybe Peter can give the best
suggestions. But if the question ends up being "directly use the java
backend vs directly use the libxslt-based backend" then I imagine the
answer is to use the libxslt-based one.

C.