Spring3, JAXB2, Java6, NamespacePrefixMapper questions

I built a simple Spring3, Hibernate3/(JPA2), RESTful service, hosted on Tomcat6, that uses JAXB2 to marshal the results. (It uses annotated pojos.) I needed to use specific namespace prefixes, so I wrote a custom com.sun.xml.bind.marshaller.NamespacePrefixMapper. I included the JAXB2 RI jars with my application and everything worked fine.

Then someone said that's great, we need to host it under WebLogic 11g (10.3.3) too. No problem, I created the special weblogic deployment descriptors to prefer the application jars, renamed my persistence.xml, and wrapped the WAR in an EAR with the JPA2 jars. It worked great, almost.

Unfortunately, our WebLogic server runs a custom security realm that also uses JAXB and causes conflicts with my application. So I dropped the JAXB jars from the app and it runs fine in WebLogic. Of course it no longer runs under Tomcat unless I add the JAXB jars to Tomcat. I'd like to avoid that.

So my questions... I've read quite a few posts on stackoverflow that contain a lot of opinions/disagreements regarding the use of the sun "internal" JAXB2 implementation vs. packaging the RI with you开发者_运维技巧r app. Is there not yet a clean solution to this problem? Does my stack support another way to custom map my namespace prefixes without including the JAXB2 RI? Can I safely use the Java6 "internal" JAXB NamespacePrefixMapper, or will that come and go with various Java releases? Does Spring3 offer another solution? What's the true story on the Java6 JAXB2 implementation? Is it only there for Sun's (Oracle's) internal use?

Thanks.

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As mentioned in the comments, I'll summarise what is mentioned in http://www.func.nl/community/knowledgebase/customize-namespace-prefix-when-marshalling-jaxb.

Note: I haven't tried this myself, so it may not work.

Essentially, you configure the JAXB marshaller to use an XMLStreamWriter when marshalling, and you configure that to map prefixes, e.g.

XMLStreamWriter xmlStreamWriter = XMLOutputFactory.newInstance().createXMLStreamWriter(writer);
xmlStreamWriter.setPrefix("func", "http://www.func.nl");

JAXBContext context = JAXBContext.newInstance(object.getClass());
Marshaller marshaller = context.createMarshaller();

marshaller.marshal(object, xmlStreamWriter);

The idea is that if JAXB hasn't been given a prefix mapper, then it'll leave it up to the XMLStreamWriter to handle the prefixes, and by doing the above, you're telling it how to do it.

Again: I'm just repeating the content from the website that's blocked from your network, so I take no credit for it being right, and no blame for it being wrong.

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The EclipseLink JAXB (MOXy) will use the namespace prefixes as declared in the @XmlSchema annotation.

For more information see:

• How to customize namespace prefixes on Jersey(JAX-WS)
• Define Spring JAXB namespaces without using NamespacePrefixMapper