Re: Serializing a (composed) XSL

[keshlam]

Why not use a stylesheet to style your stylesheet and bring the includes 
into a single document, rather than trying to work with Xalan's low-level 
data structures (which weren't really designed to be written back out as 
XSL)?

I admit I may be biased -- I wrote the "styling stylesheets" article on 
IBM's XML Developerworks page (http://www.ibm.com/xml) -- but this really 
does strike me as being both much easier and more portable.

______________________________________
"... Three things see no end: A loop with exit code done wrong,
A semaphore untested, And the change that comes along. ..."
  -- "Threes" Rev 1.1 - Duane Elms / Leslie Fish (
http://www.ovff.org/pegasus/songs/threes-rev-11.html)



From:
Arnaud Diederen <arnaud.diede...@erdas.com>
To:
xalan-j-users@xml.apache.org
Date:
08/03/2010 08:47 AM
Subject:
Serializing a (composed) XSL




Gentlemen,

I have a web application that uses, on the browser-side, XSL transforms.
Alas, because of a little issue in WebKit (affecting Google Chrome, 
Safari, ...), I cannot use composed XSLTs (i.e., XSLs that <xsl:include>s 
other bits of XSL) in Chrome.

I thought I'd give xalan-java a try at solving my problem, by "composing" 
the XSLT bits into one big XSL, on the server-side. 
That composed XSL could then be used by all browsers.

Here's what I had in mind: 
* get xalan-java to load the XSL.
* get xalan-java to load its children.
* dump the composed XSL as String, or byte [].

And here's my first attempt at this task:


            TransformerFactory tFactory = 
TransformerFactory.newInstance();
            Transformer transformer = tFactory.newTransformer
                (new StreamSource("/path/to/xslt/common.xslt"));

            TransformerImpl transformerImpl = (TransformerImpl) 
transformer;
            StylesheetRoot stylesheetRoot = 
transformerImpl.getStylesheet();
            stylesheetRoot.recompose();
            Document stylesheetDoc = stylesheetRoot.getOwnerDocument();
            W3CNodeHelper nodeHelper = new W3CNodeHelper(); 
            String out = 
nodeHelper.dumpAsString(stylesheetDoc.getChildNodes().item(0));



(Where the "W3CNodeHelper" thingy is just one of our tools I use to dump 
the document.)

Unfortunately this fails, as:
java.lang.RuntimeException: ElemTemplateElement error: Function not 
supported!
at 
org.apache.xalan.templates.ElemTemplateElement.error(ElemTemplateElement.java:223)
at 
org.apache.xalan.templates.ElemTemplateElement.error(ElemTemplateElement.java:236)
at org.apache.xml.utils.UnImplNode.getAttributes(UnImplNode.java:641)
at com.ionicsoft.xml.dom.W3CNodeHelper.dumpElement(W3CNodeHelper.java:992)
at com.ionicsoft.xml.dom.W3CNodeHelper.dump(W3CNodeHelper.java:851)
at com.ionicsoft.xml.dom.W3CNodeHelper.dump(W3CNodeHelper.java:825)
at 
com.ionicsoft.xml.dom.W3CNodeHelper.dumpAsString(W3CNodeHelper.java:802)
at com.Test.main(Test.java:43)


I guess this method is far from ideal. Would anyone have any information 
on how I could achieve what I'm trying to?

Thanks a bunch for any info/pointer!

Regards,
        A.