DOMSources from Nodes

[john <jo...@blueyonder.co.uk>]

Can anyone help me with this:

I send a document to a server using SOAP. The SOAP envelope contains some
XML data and an XSL stylesheet. I locate the Element <xsl:stylesheet ...>
and construct a DOMSource with it - xslSource.

I remove that Element from the envelope. Then find the root element of my
data <records> and construct a DOMSourse with that - xmlSource.

I construct another object with the sources which transforms the xml in the
usual way

Transformer transformer = transformerFactory.newTransformer( xslSource ) ;
transformer.transform( xmlSource, domResult ) ;


I get :
javax.xml.transform.TransformerException: java.lang.NullPointerException
at org.apache.xalan.transformer.TransformerImpl.transformNode
at org.apache.xalan.transformer.TransformerImpl.transform
....
.... 

The strange part is that if I serialize the DOMSources and write them to a
file, then read them in again as separate Documents and create DOMSources
with them, everything works as intended. So I'm reasonably confident my XSL
is OK. I thought it might be something to do with the transformer not being
able to find the Root of the document. But I have tried  the first line in my stylesheet as
is:
<xsl:template select="//records" />
&
<xsl:template select="records" />

and the result is the same.

I am using xalan 2.2 and xerces 1.4.4 with JDK 1.3.1 on Linux at home and
Solaris in college.

Where am I going wrong?

Thanks in advance

John
j.ollier@cs.ucl.ac.uk