It looks to me as if the system property
javax.xml.transform.TransformerFactory is set to null, so the system
doesn't know what XSLT processor you want to use.

Michael Kay
Software AG
home: Michael.H.Kay@xxxxxxxxxxxx
work: Michael.Kay@xxxxxxxxxxxxxx 

> -----Original Message-----
> From: owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx 
> [mailto:owner-xsl-list@xxxxxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Carlos Barroso
> Sent: 14 March 2003 10:29
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Problem transforming a xml document
> 
> 
> PLEASE HELP!
> 
> I'm having problems transforming a XML file. Here is the 
> class source code. It's only a few lines:
> 
> //---------------------- CODE -------------------------
> 
> // ** import's **
> 
> public class GenerateHTML {
>   public String process(String xmlString, String xslFile) 
> throws TransformerConfigurationException, 
> TransformerException, DocumentException, SAXException {
> 
>     ByteArrayOutputStream result = new ByteArrayOutputStream();
> 
>     SAXReader reader = new 
> SAXReader("org.apache.xerces.parsers.SAXParser");
>     Document document = reader.read(new InputSource(new 
> StringReader(xmlString)));
> 
>     TransformerFactory factory = TransformerFactory.newInstance();
>     Transformer transformer = factory.newTransformer(new 
> StreamSource(new File(xslFile)));
> 
>     DocumentSource source = new DocumentSource(document);
>     transformer.transform(source, new StreamResult(result));
> 
>     return(result.toString());
>   }
> }
> //---------------------- END CODE -------------------------
> 
> 
> I've tested the two parameters ("xmlString" and "xslFile") 
> and they have the information that I want. I'm using this 
> class inside a bean and every time I try to transform the 
> generated XML (which is valid! I tested it with XML Spy 5) it 
> keeps giving me the following error:
> 
> --------
> javax.xml.transform.TransformerFactoryConfigurationError: 
> Provider null could not be instantiated: 
> java.lang.NullPointerException
> 	at javax.xml.transform.TransformerFactory.newInstance(Unknown
> Source)
> ( ... )
> --------
> 
> I can't figure out what the problem is!? I've never had this 
> problem before.
> 
> Can someone help me please.
> 
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
> 


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