OPERATING SYSTEM
----------------
Windows

FULL JDK VERSION
----------------
StAX in JDK 1.6.0_11

DESCRIPTION
-----------
It appears the StAX XMLOutputFactory createXMLStreamWriter(javax.xml.transform.Result) only supports Stream Results.

However, this is neither documented nor enforced. I've attached BadResultTest.java which creates an XMLStreamWriter from a SAXResult. As documented in the test case, writing to thisnew XMLStreamWriter will result in a NullPointerException.

TESTCASE SOURCE
---------------
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLStreamWriter;
import javax.xml.transform.sax.SAXResult;

public class BadResultTest extends org.xml.sax.ext.DefaultHandler2 {
    public static void main (String[] args) throws Exception {
        javax.xml.stream.XMLOutputFactory factory = javax.xml.stream.XMLOutputFactory.newInstance ();

        SAXResult saxResult= new SAXResult(new BadResultTest());

        //I believe this should either store away the SAXResult
        //Or throw an UnsupportedOperationException
        //Clearly, it's expecting an Outputstream, which doesn't exist in the SAXResult
        XMLStreamWriter writer = factory.createXMLStreamWriter (saxResult);

        //tries to write to non-existant stream and throws NullPointerException
        writer.writeStartDocument ();

        System.out.println("Success");
    }
}