[xsl] TransformerException / NullPointerException in portlet

[David Q Levitt <dqlevitt@xxxxxxxxxx>]

I'm trying to do an Xalan XSLT Transformation inside a portlet in order to
transform an XML DOM Element (which I've received from a web service) into
html to display.  When the last line in the following code gets executed -
which doesn't do the transform but merely creates the transformer - I'm
getting this Exception:

javax.xml.transform.TransformerConfigurationException:
javax.xml.transform.TransformerException:
java.lang.NullPointerException at
org.apache.xalan.processor.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:816)
 at com.mycompany.portlets.dql.HelloWorld.service

here's the code:

 InputStream xsltStream =
context.getResourceAsStream("/WEB-INF/hardcode.xsl");
 xsltStreamSource = new StreamSource(xsltStream);
 TransformerFactory tFactory = TransformerFactory.newInstance();
 try {
      Transformer transformer = tFactory.newTransformer(xsltStreamSource);
      outputString = "transformer created";
 }
catch (TransformerConfigurationException tce) {
       PrintWriter writer = response.getWriter();
       tce.printStackTrace(writer);
}

I verified that the XSL file is being read properly and converted into an
InputStream.  I even went so far as to hardcode the XSL into my portlet and
read it in from a StringReader - same result.

Many thanks for any help offered.

- Dave Levitt


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