[jdom-interest] possible bug with nested namespaces

[John Caron]

When nested elements declare the same namespace, it appears that when the
inner element is done being processed, the namespace on other elements
contained in the outer element is lost.

I tested against jdom b7, and xerces 2.0.0 beta. Some testing with xerces
without jdom appears to handle it correctly.

----------
Example xml:

<test xmlns:xlink="http://www.w3.org/1999/xlink">

<e1 xlink:href="#htn_sst_decloud"/>

<wipeout xmlns:xlink="http://www.w3.org/1999/xlink">

<server type="DODS" ID="this"
xlink:href="html://thredds.unidata.ucar.edu:8080/dodsC/"/>

</wipeout>

<e1 xlink:href="#htn_sst_decloud2"/>  <!-- NOTE xlink namespace -->

</test>

--------
Program:

package test.jdom;

import org.jdom.*;
import org.jdom.input.*;
import org.jdom.output.*;
import org.jdom.transform.*;

import java.io.*;
import java.net.*;
import java.util.*;

public class TestNamespace {

  public TestNamespace( String xmlURL) throws MalformedURLException,
IOException {

    System.out.println(" Opening XML "+xmlURL);
    URL u = new URL( xmlURL);

    Document doc = null;
    try {
      SAXBuilder builder = new SAXBuilder( false);
      doc = builder.build( u);
      System.out.println(" SAXBuilder ok");
    } catch (JDOMException e) {
      System.out.println("***SAXBuilder Parsing error= "+ e.getMessage());
      e.printStackTrace();
      return;
    }

    ByteArrayOutputStream os = new ByteArrayOutputStream(10000);
    XMLOutputter fmt = new XMLOutputter("  ", true);
    try {
      fmt.output(doc, os);
      System.out.println(os.toString());
    } catch (IOException e) {
      System.out.println("output exception = "+ e.getMessage());
    }

  }

  public static void main(String[] args) {
    try {
      new
TestNamespace("http://www.unidata.ucar.edu/projects/THREDDS/xml/testSave.xml
");
    } catch (Exception e) {
      System.out.println("Main exception = \n"+ e.getMessage());
      e.printStackTrace();
    }
  }
}

----------
Output is:

 Opening XML http://www.unidata.ucar.edu/projects/THREDDS/xml/testSave.xml
 SAXBuilder ok
<?xml version="1.0" encoding="UTF-8"?>
<test xmlns:xlink="http://www.w3.org/1999/xlink">
    <e1 xlink:href="#htn_sst_decloud" />
    <wipeout>
        <server type="DODS" ID="this"
xlink:href="html://thredds.unidata.ucar.edu:8080/dodsC/" />
  </wipeout>
    <e1 href="#htn_sst_decloud2" />  <!-- HERES THE PROBLEM - the xlink
namespace removed !! -->
</test>