[jdom-interest] Problem using Tip: Using JDOM and XSLT by Brett McLaughlin

[Ian Lea]

I tend to avoid PipedInput/Output streams wherever possible
since they have considerable scope for lockups.  Perhaps you
could use StringReaders/Writers or the ByteArray equivalents
instead.

Or look into JDOMSource and JDOMResult, or, unless you are
tied to Xalan, look at Saxon which has a DocumentWrapper
class which wraps a JDOM Document and feeds it straight into
a transformer.  I use code like this:

        import ...
        import com.icl.saxon.jdom.DocumentWrapper;

        Document jdoc = buildJdoc(xml);
        DocumentWrapper docw = new DocumentWrapper(jdoc, null);
	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	StreamResult baossr = new StreamResult(baos);
	getSaxonTransformer(xsl).transform(docw, baossr);

and then do what I want with the output.



--
Ian.
ian.lea at blackwell.co.uk


Jason Long wrote:
> 
> I am attempting to make use of "Listing 1. Using JDOM with Xalan-J 2" which
> can be found at the following url:
> http://www-106.ibm.com/developerworks/java/library/x-tipjdom.html
> 
> Here is my system configuration:
> W2K Advanced Server
> JDK 1.4 beta 2
> Tomcat 4.0 Final
> JDOM beta 7
> 
> I have been working on a servlet that compiles a list of some files on my
> server, parses their names, and generates an xml file.  For this JDOM worked
> beautifully.  I had used SAX and DOM before and had many headaches.  Due to
> JDOM's ease of use I had my application building the XML file in no time.
> Now it was time to transform the XML using XSL so that it could be displayed
> to match the rest of my site.  I simply pasted the transform method from
> "Listing 1. Using JDOM with Xalan-J 2" in the previously mentioned tip and
> added the appropriate jar files for Tomcat.  Everything compiled properly,
> but my browser just hangs and never gets a reply.  I began by commenting out
> all of the code and adding one line at a time until it began to fail.  Here
> is where my code hangs:
> 
> // Output to the I/O stream
>   xmlOutputter.output(sourceDoc, sourceOut);
> 
> Unless I comment out this line and the rest of the code that follows which
> depends on this line the servlet never responds back.  It seems that I have
> Xalan installed properly because the code previous to this point depends on
> it and the point where the servlet freezes has nothing to do with it.  I
> have yet to resolve this problem, but am very excited about JDOM.  I would
> appreciate and assistance with this matter.
> 
> Best Regards,
> 
> Jason Long
> JML Internet Enterprise - www.jmlie.com
> BS Physics, MS Chemical Engineering