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

[John Jefferson]

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
"".  

When I proceed to validate against a schema I find
that it fails b/c it doesn't find the children
belonging to the default namespace.

Am I doing something wrong or is there a bug?

Thanks,

MG

Here is a code snippet

        Namespace default =
Namespace.getNamespace("http://locahost/root");
        Namespace xsi = Namespace.getNamespace("xsi",
"http://www.w3.org/2001/XMLSchema-instance");
        Namespace custom =
Namespace.getNamespace("custom",
"http://www.custom.com/CUSTOM");
        
        String value = 
            "http://locahost/root "+
            SCHEMA_LOCATION + "root.xsd " +
            "http://www.custom.com/CUSTOM "+ 
            SCHEMA_LOCATION + "custom.xsd";
            
        Attribute schemalocation = new
Attribute("schemaLocation", value);         
        schemalocation.setNamespace(xsi);
        
        //add the following namespaces declarations
        ele.addNamespaceDeclaration(xsi);
        ele.addNamespaceDeclaration(custom);
        //set the namespace
        ele.setNamespace(default);
        ele.setAttribute(schemalocation);

            StringWriter sw = new StringWriter();
            XMLOutputter xmlOutputter = new
XMLOutputter("\t", true);
            xmlOutputter.setOmitDeclaration(true);
            xmlOutputter.setLineSeparator("\n");
            xmlOutputter.setTextNormalize(false);
            xmlOutputter.setTextTrim(false);
            String output =
xmlOutputter.outputString(ele);
            
            sw.write(output);
            sw.write("\n");

What I end up with is then:

<root xmlns="http://localhost/root"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:custom="http://www.custom.com/CUSTOM"
xsi:schemaLocation="http://localhost/root root.xsd
http://www.custom.com/CUSTOM custom.xsd">
	<child1 xmlns="">
	</child1>
</root>

where the child1 element above is the problem.  

<xmloutputter method jdom 9>

    private void printElementNamespace(Element
element, Writer out,  NamespaceStack namespaces)
                             throws IOException {
        // Add namespace decl only if it's not the XML
namespace and it's
        // not the NO_NAMESPACE with the prefix "" not
yet mapped
        // (we do output xmlns="" if the "" prefix was
already used and we
        // need to reclaim it for the NO_NAMESPACE)
        Namespace ns = element.getNamespace();
        if (ns == Namespace.XML_NAMESPACE) {
            return;
        }
        if ( !((ns == Namespace.NO_NAMESPACE) &&
               (namespaces.getURI("") == null))) {
            printNamespace(ns, out, namespaces);
        }
    }

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