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https://issues.apache.org/jira/browse/AXIOM-441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495460#comment-13495460
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Andreas Veithen commented on AXIOM-441:
---------------------------------------
That case is definitely supported by Axiom. The only reason that could explain
that failure would be an incompatibility between Axiom and the underlying
parser. What StAX implementation are you using?
> Fails to parse XML with empty default namespace attribute value
> ---------------------------------------------------------------
>
> Key: AXIOM-441
> URL: https://issues.apache.org/jira/browse/AXIOM-441
> Project: Axiom
> Issue Type: Bug
> Components: LLOM
> Affects Versions: 1.2.13
> Reporter: Paul Millar
> Priority: Critical
>
> From:
> http://www.w3.org/TR/2009/REC-xml-names-20091208/
> "The attribute value in a default namespace declaration MAY be empty. This
> has the same effect, within the scope of the declaration, of there being no
> default namespace."
> Here is a document that demonstrates this:
> <?xml version='1.0' encoding='UTF-8'?>
> <foo xmlns='http://example.org/'>
> <bar xmlns=''>value</bar>
> </foo>
> The following code snippet (slightly modified from Axiom documentation) uses
> Axiom to parse a String variable xmlData:
> InputStream in =
> new
> ByteArrayInputStream(xmlData.getBytes(Charset.forName("UTF-8")));
> OMXMLParserWrapper builder = OMXMLBuilderFactory.createOMBuilder(in);
> OMElement documentElement = builder.getDocumentElement();
> documentElement.serialize(System.out);
> System.out.println();
> When given the above XML example, an IllegalArgumentException is thrown:
> Exception in thread "main" java.lang.IllegalArgumentException: Namespace URI
> may not be null
> at
> org.apache.axiom.om.impl.llom.OMNamespaceImpl.<init>(OMNamespaceImpl.java:38)
> at
> org.apache.axiom.om.impl.llom.OMElementImpl.addNamespaceDeclaration(OMElementImpl.java:430)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.processNamespaceData(StAXOMBuilder.java:608)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.populateOMElement(StAXOMBuilder.java:430)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.createOMElement(StAXOMBuilder.java:461)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.createNextOMElement(StAXOMBuilder.java:318)
> at
> org.apache.axiom.om.impl.builder.StAXOMBuilder.next(StAXOMBuilder.java:249)
> at
> org.apache.axiom.om.impl.llom.OMElementImpl.buildNext(OMElementImpl.java:709)
> at
> org.apache.axiom.om.impl.llom.OMNodeImpl.getNextOMSibling(OMNodeImpl.java:121)
> at
> org.apache.axiom.om.impl.traverse.OMChildrenIterator.getNextNode(OMChildrenIterator.java:36)
> at
> org.apache.axiom.om.impl.traverse.OMAbstractIterator.hasNext(OMAbstractIterator.java:69)
> at
> org.apache.axiom.om.impl.util.OMSerializerUtil.serializeChildren(OMSerializerUtil.java:555)
> at
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:846)
> at
> org.apache.axiom.om.impl.llom.OMSerializableImpl.serialize(OMSerializableImpl.java:120)
> at
> org.apache.axiom.om.impl.llom.OMSerializableImpl.serialize(OMSerializableImpl.java:108)
> at
> org.apache.axiom.om.impl.llom.OMSerializableImpl.serialize(OMSerializableImpl.java:127)
> This looks like a bug.
> Cheers,
> Paul.
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