jax rs - Problem with JAXB marshalling an object: javax.xml.bind.JAXBException: class ... or any of its super class is known to this context -

in jax-rs project (jersey) i'm having problem getting 1 of jaxb-annotated objects marshalled json. here error message see in logs:

severe: internal server error javax.ws.rs.webapplicationexception: javax.xml.bind.jaxbexception: class com.dnb.applications.webservice.mobile.view.companiesandlocations nor of super class known context.

does point specific problem? resource has method this:

@path("/name/{companyname}/location/{location}") @produces("application/json; charset=utf-8;") @consumes("application/json") @post public viewable findcompanybycompanynameandlocationasjson(@pathparam("companyname") string companyname,         @pathparam("location") string location, criteriaview criteria) {     criteria = criteria != null ? criteria : new criteriaview();     criteria.getkeywords().setcompanyname(companyname);     return getcompanylistshandler().listsbycompanynameandlocation(criteria, location); } 

viewable empty interface. above method returns object of type companiesandlocations, defined follows:

@xmlrootelement @xmlaccessortype(xmlaccesstype.field) @xmltype(name = "companiesandlocations", proporder = { "count", "normalizedlocations", "companylist", "companymap", "modifiers",         "modifiersmap", "companycount", "navigators" }) public class companiesandlocations extends basecompanies implements viewable {      @xmlelement(name = "normalizedlocations", required = false)     protected list<normalizedlocation> normalizedlocations;      public list<normalizedlocation> getnormalizedlocations() {         if (normalizedlocations == null) {             normalizedlocations = new arraylist<normalizedlocation>();         }         return normalizedlocations;     }  } 

basecompanies defines number of other fields:

@xmltransient public abstract class basecompanies {      @xmlelement(name = "modifiers", required = false)     private list<modifiers> modifiers; .... 

i should add i'm deviating approach used other working code in app. other resource methods objects objectfactory annotated @xmlregistry. don't think necessary, though. have seen other code directly instantiates jaxb-annotated pojo'swithout using objectfactory factory.

any ideas?

jax-rs can bootstrap jaxbcontext, can't reach classes needs know about. reason can implement contextresolver. gives full control on how jaxbcontext created. below example of how might look:

package org.example.order;  import javax.ws.rs.produces; import javax.ws.rs.ext.contextresolver; import javax.ws.rs.ext.provider; import javax.xml.bind.jaxbcontext; import javax.xml.transform.source; import javax.xml.transform.stream.streamsource;  import org.eclipse.persistence.jaxb.jaxbcontextfactory;  @provider @produces({"application/xml", "application/json"}) public class purchaseordercontextresolver implements contextresolver<jaxbcontext> {      private jaxbcontext jaxbcontext;      public purchaseordercontextresolver() {         try {             // bootstrap jaxbcontext necessary classes             jaxbcontext = jaxbcontext.newinstance(purchaseorder.class);         } catch(exception e) {             throw new runtimeexception(e);         }     }      public jaxbcontext getcontext(class<?> clazz) {         if(purchaseorder.class == clazz) {             return jaxbcontext;         }         return null;     }  }