I am having a lot of difficulty getting the combination of JiBX 1.1.6a/1.2.1,
Woodstox Stax 3.2.1, Spring WS 1.5.6 and Spring Batch 2 to parse attributes
in an xml file which has no namespace. Whatever I do I get the execption
org.jibx.runtime.JiBXException: Missing required attribute "testAttribute"
Through debugging I think I have tracked down the problem, and it revolves
around the fact that the JiBX generated code is looking for the attribute
with a namespace of null but trying to match against a QName returned by
Woodstox which contains the empty string "":
- When I set a breakpoint in the concrete implementation of:
XMLStreamReader.getAttributeValue(String namespaceURI, String localName) I
see that the generated binding code is calling this function with
namespaceURI = null.
- The concrete implementation comes from spring-xml 1.5.6 - its
org.springframework.xml.stream.XmlEventStreamReader which is used to turn an
event reader into a stream reader (necessary because Spring Batch takes a
nifty fragment based approach to reading XML). This compares the incoming
namespareURI argument to the namespace in the QName:
public String getAttributeValue(String namespaceURI, String localName) {
for (int i = 0; i < getAttributeCount(); i++) {
QName name = getAttributeName(i);
if (name.getNamespaceURI().equals(namespaceURI) &&
name.getLocalPart().equals(localName)) {
return getAttributeValue(i);
}
}
return null;
}
- Working through the StAX implementation it seems that the w3c
recommendation is that QName will contain the empty string when no namespace
is declared so what Woodstox does is correct:
/**
*
Prefix to use to represent the default XML Namespace.
*
*
Defined by the XML specification to be "".
*
* @see http://www.w3.org/TR/REC-xml-names/#ns-qualnames
* Namespaces in XML, 3. Qualified Names
*/
public static final String DEFAULT_NS_PREFIX = "";
So my question is, having tracked down the problem, can anyone suggest an
easy option for working around this mismatch?
I saw it was discussed http://markmail.org/message/hblgqudv65tgc3lm here .
However since I am operating in Spring Batch (so am several steps removed) I
will have to rewrite quite a lot of classes in order to replace the Spring
implementation with a version which matches both null and "".
I saw some mention that there was some work being done on Spring
compatibility in JiBX 2.0 so I am hoping someone has already picked up on
this issue (hoping a lot since I am a big fan of both JiBX and Spring).
Hopefully I have identified the root cause of the issue in detail. But here
are the sources, starting with the XML file
http://www.nabble.com/file/p23349737/example.xml example.xml
This is my binding file
http://www.nabble.com/file/p23349737/test.jibx.xml test.jibx.xml
This is my java:
http://www.nabble.com/file/p23349737/SingleTest.java SingleTest.java
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