[jdom-interest] XmlOutputter - printNamespace - NO_NAMESPACE outputs xmlns="", bug?

[John Jefferson]

Actually I do something like this:

String xml = "<root> <child1> data </child1> </root>";
StringReader sr = new StringReader(xml);

XMLReader xr =
XMLReaderFactory.createXMLReader(PARSER)
xr.parse(new InputSource(fr));

then when sax says I am at the root element I do the
following:

    public void endElement (String uri, String
localName, String qName)
    throws SAXException
    {
 
if (stack.empty()) {
                atRoot = true;
            }

if (atRoot)  {
  handleRoot(Element ele);
}

handleRoot is the original code snippet. 

So I am not really adding the nodes.  They already
exist and should be in the default namespace.

Can anyone explain the logic in the orginal code
fragment?  I just recreated the xmloutputter class and
changed the logic to :

            if ( (!(ns == Namespace.NO_NAMESPACE) &&
                   (namespaces.getURI("") == null))) {
                printNamespace(ns, out, namespaces);
            }

This seems to work and is what I want.

--- Eric VERGNAUD <eric.vergnaud at wanadoo.fr> wrote:
> le 2/07/03 23:31, John Jefferson à
> surfer97301 at yahoo.com a écrit :
> 
> > 
> > Hi,
> > 
> > My problem is that when outputing xml some of the
> > children of my document are given blank
> namespaces.
> > 
> > For instance <root> <child1
> xmlns=""></child1></root>
> > 
> > The reason for this is in the method below and
> occurs
> > because the namespace is NO_NAMESPACE but
> > namespaces.getURI("") is not null.
> > 
> > This is bad because I set the default namespace of
> the
> > root element to a value - the value of
> > namespaces.getURI("") - but the children are then
> > defined to be using a different namespace the
> xmlns of
> > "".  
> > 
> 
> Since I ran into exactly the same problem a few
> weeks ago, here is the
> answer:
> 
>  - you need to set each child's namespace to your
> root namespace. This will
> end up with:
> 
> <root xmlns="root"> <child1> data </child1> </root>
> 
>  - this is because there seems to be no concept of a
> default namespace when
> creating a document, while there is one when reading
> 
>  - looks like I'm not the only one to think this is
> counter-intuitive, so
> maybe it could be discussed on this list
> 
> Eric
> 
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