Transform From one JAXB object to another using XSLT template

Question

Is there a way to transform a JAXB generated object to another JAXB object using an XSLT template file. The two objects are generated by two different JAXB bindings.

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Answer 1

No, it is not possible. JAXB converts Java to XML or XML to Java. If you have XML, then use XSLT to transform the document. If you have a Java object, then use Java to transform an object. There is no intermediary format.

Answer 2

I don't think its possible without any intermediate serialization or dom tree construction, but serializing to a string would be the worst option imho. The best option would probably to marshal to a TransformerHandler which does the xsl transformation and builds a dom tree. This tree can then be unmarshalled again. Here is some (untested) sample code showing how this could work:

Source xsl = ...
SAXTransformerFactory factory = (SAXTransformerFactory) TransformerFactory.newInstance();
TransformerHandler handler = factory.newTransformerHandler(xsl);

DOMResult result = new DOMResult();

handler.setResult(result);

marshaller.marshal(inputObject, handler);

transformedObject = unmarshaller.unmarshal(result.getNode());