[XALANJ-2361] DOM to stream conversion fails on prefix beginning like "xmlConfiguration"

• Type: Bug
• Status: Open
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 2.7
• Component/s: Serialization
• Xalan info: PatchAvailable
• Assignee: Brian Minchau
• Reporter: Guillaume Nodet
• Created: 24/Jan/07 10:55
• Updated: 06/Feb/07 16:49

Description

Here is a simple test case to reproduce the problem:

code
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
TransformerFactory tf = TransformerFactory.newInstance();

String src = "<root><xmlConfiguration:xmlConfiguration xmlns:xmlConfiguration=\"urn:configuration\" /></root>";
Document doc = dbf.newDocumentBuilder().parse(new ByteArrayInputStream(src.getBytes()));
ByteArrayOutputStream res = new ByteArrayOutputStream();
tf.newTransformer().transform(new DOMSource(doc), new StreamResult(res));
System.out.println(res);
dbf.newDocumentBuilder().parse(new ByteArrayInputStream(res.toByteArray()));
code

The last line throws an exception, because the xmlns:xmlConfiguration attribute has been lost.

While debugging, I found that the problem comes from http://svn.apache.org/repos/asf/xalan/java/trunk/src/org/apache/xml/serializer/NamespaceMappings.java,
line 228:

code
// Prefixes "xml" and "xmlns" cannot be redefined
if (prefix.startsWith(XML_PREFIX))

{ return false; }
code

It seems this test is wrong, and it should be

code
// Prefixes "xml" and "xmlns" cannot be redefined
if (prefix.equals("xml") || prefix.equals("xmlns")
{ return false; }

code