"Namespace URI may not be null" when parsing attributes
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Key: AXIS2-3910
URL: https://issues.apache.org/jira/browse/AXIS2-3910
Project: Axis 2.0 (Axis2)
Issue Type: Bug
Affects Versions: 1.4
Reporter: Jake Goulding
org.apache.axis2.AxisFault: Namespace URI may not be null
at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
at vivisimo.Stub.fromOM(Stub.java:46095)
at vivisimo.Stub.Simple(Stub.java:194)
at Main.main(Main.java:75)
Caused by: java.lang.IllegalArgumentException: Namespace URI may not be null
at org.apache.axiom.om.impl.dom.NamespaceImpl.<init>(NamespaceImpl.java:32)
at org.apache.axiom.om.impl.dom.NamespaceImpl.<init>(NamespaceImpl.java:38)
at vivisimo.Stub$Document_type0$Factory.parse(Stub.java:40060)
at vivisimo.Stub$List_type0$Factory.parse(Stub.java:23215)
at vivisimo.Stub$Vce$Factory.parse(Stub.java:2113)
at vivisimo.Stub.fromOM(Stub.java:46089)
Looking at the code, it comes from this section:
// now run through all any or extra attributes
// which were not reflected until now
for (int i=0; i < reader.getAttributeCount(); i++) {
if (!handledAttributes.contains(reader.getAttributeLocalName(i))) {
// this is an anyAttribute and we create
// an OMAttribute for this
org.apache.axiom.om.impl.llom.OMAttributeImpl attr =
new org.apache.axiom.om.impl.llom.OMAttributeImpl(
reader.getAttributeLocalName(i),
new org.apache.axiom.om.impl.dom.NamespaceImpl(
reader.getAttributeNamespace(i), reader.getAttributePrefix(i)),
reader.getAttributeValue(i),
org.apache.axiom.om.OMAbstractFactory.getOMFactory());
The node that is causing the failure is:
<vce xmlns="urn:/vivisimo/velocity">
<list path="" num="118" level="0" start="0" per="10">
<document url="http://blogs.usatoday.com/popcandy/2008/07/pop-forum-tal-2.html";
rank="0" source="USAToday" score="0.111111"
context="v%3astate=%28root%29%7croot&v%3aframe=tree&subquery=id%3aNdoc1.30&active%3d=root&v%3asubsearch=1&"
/>
</list>
</vce>
The problematic attribute is @context, which is not defined in my XSD.
In all, I think there are 2 problems:
1/ I don't actually have an anyAttribute in my schema, so I would have expected
to see an error similar to the "unexpected subelement" error.
2/ I don't think that this should cause my program to generate an exception in
this manner. According to the spec:
"The namespace name for an unprefixed attribute name always has no value." [1]
On further reading of the spec, I think that this sentence makes it more clear
what should happen:
"Default namespace declarations do not apply directly to attribute names; the
interpretation of unprefixed attributes is determined by the element on which
they appear"
That is, the code should be something like:
if (namespace uri of attribute == null)
use namespace uri of containing element
[1] http://www.w3.org/TR/xml-names/#defaulting
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