JAXB class returned from @RestController XML elements wonky

Question

I am porting an old application that runs on JBoss to Spring Boot/Tomcat and have most everything working except the response XML. The old code appears to be using xmlbeans for the XSD source generation. I've changed this to use JAXB. Here's my class:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "EventsResponseType1_1", propOrder = {
    "getAllEventCodesResponse",
    "saveEventCodeResponse",
    "failMessageResponse",
    "getEmailHistoryResponse"
})
public class EventsResponseType11 {

    protected GetAllEventCodesResponseType getAllEventCodesResponse;
    protected SaveEventCodeResponseType saveEventCodeResponse;
    @XmlElement(name = "FailMessageResponse")
    protected ResponseType failMessageResponse;
    protected GetEmailHistoryResponseType getEmailHistoryResponse;

    // Getters and setters
}

And one of the element classes:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "getAllEventCodesResponseType", propOrder = {
    "_return",
    "results"
})
public class GetAllEventCodesResponseType {

    @XmlElement(name = "Return", required = true)
    protected ReturnType _return;
    @XmlElement(name = "Results")
    protected GetAllEventCodesResponseType.Results results;

    // Getters and setters
}

Here's the response XML:

<com.foo.bar.EventsResponseType11>
  <getAllEventCodesResponse>
      <__return>
         <returnCode>0</returnCode>
         <returnMessage />
      </__return>
      <results>
         <eventCodes>
            <com.foo.bar.EventCodeInfoType>
               <eventCodeID>1</eventCodeID>
               <eventCode>1000</eventCode>
               <eventCodeDesc>Success</eventCodeDesc>
               <eventCodeIndicator>SUCCESS</eventCodeIndicator>
               <eventCodeContext>General</eventCodeContext>
               <createdBy>system</createdBy>
            </com.foo.bar.EventCodeInfoType>
         </eventCodes>
      </results>
   </getAllEventCodesResponse>
</com.foo.bar.EventsResponseType11>

I have configured my application:

@SpringBootApplication
@ComponentScan("com.foo.bar")
public class WsApp extends WebMvcConfigurerAdapter{

    public static void main(String[] args) {
        SpringApplication.run(WsApp.class, args);
    }

    /**
     * Configure the XML as the only return type on requests
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

        List<MediaType> mediaTypes = new ArrayList<>();
        mediaTypes.add(MediaType.TEXT_XML);

        XStreamMarshaller xmlMarshaller = new XStreamMarshaller();

        MarshallingHttpMessageConverter xmlConverter = new MarshallingHttpMessageConverter(xmlMarshaller);
        xmlConverter.setSupportedMediaTypes(mediaTypes);

        converters.add(xmlConverter);

        super.configureMessageConverters(converters);
    }
}

And my controller:

@RestController
@RequestMapping("/go")
public class EventService { 
    @RequestMapping(value = "/events", method = RequestMethod.POST)
    public ResponseEntity<EventsResponseType11> events(@RequestBody EventsRequestType11 request){

        EventsResponseType11 responseDoc = eventCodesProxy.invoke(request);

        return ResponseEntity.ok(responseDoc);
    }
}

So my first question is, how can I stop the marshaller from including the package name on those elements that have it.

And second, since the XSD defines a field as "return" JAXB added an underscore to the field name. The @XmlElement annotation on that field identifies this as "Return" which is what I want on the response (without any underscores)

I've tried using a JAXB Marshaller in place of the XStreamMarshaller with no luck. If at all possible, I would opt not to modify the schema because it's old and has a lot of inter-department dependencies.

Thanks in advance for your help!

Answer 1

So after a lot of trial and error, I stumbled upon this post:

Spring 4 mvc REST XML and JSON response

My application class:

@SpringBootApplication
@ComponentScan("com.foo.bar")
@EnableWebMvc
public class WsApp extends WebMvcConfigurerAdapter{

    public static void main(String[] args) {
        SpringApplication.run(WsApp.class, args);
    }

    /**
     * Configure the negotiator to return ONLY XML
     */
    @Override
    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
        configurer.favorPathExtension(false).
            favorParameter(true).
            parameterName("mediaType").
            ignoreAcceptHeader(true).
            useJaf(false).
            defaultContentType(MediaType.APPLICATION_XML).
            mediaType("xml", MediaType.APPLICATION_XML);
    }
}

I stated before that I wouldn't be too happy about modifying the XSDs, but I had to make a few tweaks to add the @XmlRootElement. I had tried to modify the JAXB source generation through additional libraries but that didn't work out so well.