Namespaces in TransformerHandler?

Question

Are SAX namespace events correctly handled by javax.transformer.sax.TransformerHandler? Given the following class:
import javax.xml.transform.sax.TransformerHandler;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.stream.StreamResult;
import org.xml.sax.helpers.AttributesImpl;
public class NameSpaceTest {
    public static void main(String[] args) throws Exception {
        SAXTransformerFactory factory = ( SAXTransformerFactory )SAXTransformerFactory.newInstance();
        TransformerHandler handler = factory.newTransformerHandler();
        handler.setResult( new StreamResult( System.out ));
        handler.startDocument();
        handler.startPrefixMapping( "", "http://one.namespace.com" );
        handler.startPrefixMapping( "two", "http://two.namespace.com" );
        handler.startElement( "http://one.namespace.com", null, "foo", new AttributesImpl() );
        handler.startElement( "http://two.namespace.com", "bar", "two:bar", new AttributesImpl() );
        handler.endElement( "http://two.namespace.com", "bar", "two:bar" );
        handler.endElement( "http://one.namespace.com", null, "foo" );
        handler.endPrefixMapping( "two" );
        handler.endPrefixMapping( "" );
        handler.endDocument();
}One would expect the output to be
  <foo xmlns="http://one.namespace.com" xmnls:two="http://two.namespace.com">
    <two:bar/>
  </foo>But, alas, the following is output:
  <foo>
    <two:bar/>
  </foo>The above, alas, is well-formed but it isn't valid.

Answer 1

I tried this in Java 1.3 with Saxon as my transformer, and it threw a NullPointerException. When I modified your code to replace null by "foo" like this:handler.startElement( "http://one.namespace.com", null, "foo", new AttributesImpl() );and ditto for endElement, it worked the way you expected it to work, with the correct namespace declarations output. Didn't try it in 1.4 with whatever transformer they have in there.