@WebServiceProvider()
public class SOAPConverterService implements Provider<Source> {
    @Resource
    WebServiceContext wsContext;
    @Override
     public Source invoke(Source source) {
            try {

DOMResult dom=ServiceUtility.transformDom(source);//want to replace here with STAX


// remain logic goes here
       }catch(ServiceNotFoundException e){
            throw new RuntimeException(e.getMessage());
        }
    }