Re: Using XT via a Java Servlet?

[Paul Tchistopolskii <paul@xxxxxxx>]

Writing my answer  to the XSL-list  scares me a bit, but 
I hope I will not say something extremely stupid from 
James Clark's point of view ;-)

If there are some serious mistakes in the text below
( I'm taking about XT interlans as I see them ;-) , I hope 
James would correct me.

> Has anyone taken the DOMDemo.java example included in the demo directory of 
> XT and made it work as a Java servlet?  If so, mind sharing your code?  I'm 
> able to use LotusXSL in this manner, but haven't had any luck yet with 
> XT.  TIA,

The DOMDemo utilizes XSLTransformEngine.

I think it could be fair to say that at the moment there is kind 
of *two* transform engines in the latest version of XT.jar.

The 'basic'  and 'well-known' engine ( XSLProcessorImpl ) 
takes some 'input', builds the 'XT-specific' DOM and then allows 
you to transform that 'XT-specific' DOM into diferent 'output media'. 

You are specifying the desired 'output media' attaching 
the desired destination to OutputMethodHandlerImpl and 
then attaching the OutputMethodHandlerImpl to  
XSLProcessorImpl .

OutputMethodHandlerImpl outputMethodHandler = 
    new OutputMethodHandlerImpl(xsl);

 xsl.setOutputMethodHandler(outputMethodHandler);

 outputMethodHandler.setDestination 
  ( new ServletDestination(response) );

This pattern *does*not* work with XSLTransformEngine.
I mean that XSLTransformEngine assumes that one is 
utilizing this class for XML-DOM -> XML-DOM only transformations.

However, with semi-trivial subclassing *and* some cut&paste
I forced XSLTransformEngine to take into account  OutputMethodHandlerImpl

main[]

MySunXMLProcessorImpl reader = new MySunXMLProcessorImpl();
  
org.w3c.dom.Node Sheet = reader.load
   ( new InputSource( new URL("file", "", args[1]).toString() ) );

org.w3c.dom.Node Content = reader.load
   ( new InputSource( new URL("file", "", args[0]).toString() ) );

com.sun.xml.tree.XmlDocument doc = new com.sun.xml.tree.XmlDocument ();

OutputMethodHandlerImpl outputMethodHandler = new OutputMethodHandlerImpl( null );

//  This is important. For a servlet one should use:
//  outputMethodHandler.setDestination ( new ServletDestination(response) );

outputMethodHandler.setDestination ( new FileDescriptorDestination(FileDescriptor.out) );

reader.createTransform(Sheet).My_transform( Content, outputMethodHandler );

Rgds.Paul.

PS. If you realy need that hack very-very-much I may send it to you, but I suggest 
to wait until (if) James will come with the 'common'  design of XSLTransformEngine
and XSLProcessorImpl .




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