MOXy DynamicJAXBContext VALUE_WRAPPER and ATTRIBUTE_PREFIX

[robinroos]

[ copied to eclipselink from stackoverflow: https://stackoverflow.com/questions/79655678/moxy-dynamicjaxbcontext-value-wrapper-and-attribute-prefix ]

I am migrating a use-case from XML -> SaticJAXB -> MongoDocument to XML -> DynamicJAXB -> MongoDocument

To avoid information loss, allowing equivalent XML to be reconstituted later from the JSON/BSON in mongodb, it is necessary to customise the value wrapper (by default "value") and to customise the attribute prefix (by default there is none).

    DynamicJAXBContext dynamicContext = DynamicJAXBContextFactory.createContextFromXSD(xmlSchema, entityResolver, classLoader, properties);
    JAXBUnmarshaller unmarshaller = dynamicContext.createUnmarshaller();
    JAXBElement root = (JAXBElement) unmarshaller.unmarshal(xml);

Having obtained the JAXBElement representing the root element of the XML document I am able recursively to iterate DynamicEntityImpl.PropertyWrapper in order to build up the JSON/BSON document analogous to the original XML.

However, without disambiguation of XML value and attribute names it will not be possible to recreate the XML from JSON/BSON.

I have tried using

    unmarshaller.setProperty(UnmarshallerProperties.JSON_VALUE_WRAPPER, "#value");
    unmarshaller.setProperty(UnmarshallerProperties.JSON_ATTRIBUTE_PREFIX, "_");

but of course my code is not actually using any of MOXy's JSON abstractions, this is essentially an XML Unmarshaller, so upon reflection I am not surprised that this was unsuccessful.

Perhaps most helpful to me would be the addition of similar properties "XML_VALUE_WRAPPER" and "XML_ATTRIBUTE_PREFIX" to be recognised by the XML parser and which could be set via Map properties when constructing DynamicJAXBContext.

I will be raising several issues against eclipselink MOXy. Most will be feature requests. This one is by far the most critical to my project.

[rfelcman]

Did You try to pass these properties into DynamicJAXBContextFactory.createContextFromXSD? It should work.
Something like:

        Map<String, Object> properties = new HashMap<String, Object>(1);
        properties.put(JAXBContextProperties.JSON_VALUE_WRAPPER, "#value");
        properties.put(JAXBContextProperties.JSON_ATTRIBUTE_PREFIX, "_");

        ClassLoader classLoader = SessionEventListenerTestCases.class.getClassLoader();
        InputStream schemaStream = ClassLoader.getSystemResourceAsStream("org/eclipse/persistence/testing/jaxb/dynamic/sessioneventlistener/schema.xsd");
        JAXBContext jc = DynamicJAXBContextFactory.createContextFromXSD(schemaStream, null, classLoader, properties);
        unmarshalTest(jc);