I am also facing the same problem. I have deployed Rest services using
JBoss5.1 and I am calling this rest service using a HTTP client.
Here is my client code.
        HttpClient client = new HttpClient();
 
        BufferedReader br = null;
        PostMethod method = new
PostMethod("
http://localhost:8080/ResultService/rest/resultservice/toc");
        method.addRequestHeader("Content-type", "application/json");
        
       
com.altair.hwe.publish.resultservice.schema.resultcommonschema.ObjectFactory
ob1
        = new
com.altair.hwe.publish.resultservice.schema.resultcommonschema.ObjectFactory();
       
com.altair.hwe.publish.resultservice.schema.tocrequestschema.ObjectFactory
ob2
        = new
com.altair.hwe.publish.resultservice.schema.tocrequestschema.ObjectFactory();
        TOCRequest tocRequest = ob2.createTOCRequest();
// Assume that I have populated tocRequest  with proper values.
        JAXBContext jc =                  
JAXBContext.newInstance("com.altair.hwe.publish.resultservice.schema.tocrequestschema");
        BaseJSONMarshaller b = new BaseJSONMarshaller(jc,
JSONConfiguration.mapped().build());
        
        StringWriter w = new StringWriter();
        b.marshallToJSON(tocRequest, w);
        
        StringRequestEntity ent = new StringRequestEntity(w.toString());
        method.setRequestEntity(ent);
        
        try{
          int returnCode = client.executeMethod(method);
          System.out.println("ret: " + returnCode);
          System.out.println(method.getResponseBodyAsString());
        } 
        catch (Exception e) {
          System.err.println(e);
        } finally {
          method.releaseConnection();
          if(br != null) try { br.close(); } catch (Exception e) {}
        }
Client is generating the correct format. but on server side, all the fields
are set to null.
Here is my POST method under the rest service:-
    @POST
    @Path("/toc")
    @Consumes({"application/json","application/xml"})
    @Produces({"application/json","application/xml"})
    public TOCOfResult getTOCForResultSource(TOCRequest tocRequest) throws
ResultServiceException
    {
        try
        {
            DefaultUserCredentials userCredentials = null;
            try
            {
                userCredentials = new DefaultUserCredentials("user", "");
            }
            catch ( Exception e )
            {
                e.printStackTrace();
            }
            return m_resultService.getTOC(tocRequest, userCredentials);
        }
        catch ( ResultServiceException e )
        {
            LOGGER.error("Internal error occured. Could not retrieve the
TOC", e);
            throw e;
        }
How I can register my JAXBContextResolver class in this case. 
Any sort of help would be great.
Thanks in advance.
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