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From "Andreas Veithen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AXIOM-441) Fails to parse XML with empty default namespace attribute value
Date Mon, 12 Nov 2012 18:05:12 GMT

    [ https://issues.apache.org/jira/browse/AXIOM-441?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13495460#comment-13495460
] 

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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