ClassCastException com.sun.org.apache.xerces.internal.dom.ElementNSImpl

Question

我得到一個ClassCastException。我想知道我在這裏做錯了什麼。做(RegistrationRequest)(element.getValue())應該已經工作了。我知道(RegistrationRequest)element.getValue()可能沒有。

SEVERE: Servlet.service() for servlet [Jersey REST Service] in context with path [/mCruiseOnCarPool4All] threw exception 
java.lang.ClassCastException: com.sun.org.apache.xerces.internal.dom.ElementNSImpl cannot be cast to com.mcruiseon.common.message.request.RegistrationRequest 

服務器發佈方法，請注意方法簽名中的JAXBElement。我在類型化clientSession.waitAndGetResponse((RegistrationRequest)(element.getValue())) ;。這是我得到例外的行號。

@POST 
@Path ("Request") 
@Consumes({ MediaType.APPLICATION_JSON }) 
public Response post(JAXBElement<Object> element) { 
    AMessageStrategy response ; 
    try { 
     clientSession = new ClientSession(God.mCruiseOnServer) ; 
    } catch (InvalidServerDNSorIPException e) { 
     e.printStackTrace(); 
     return Response.serverError().build() ; 
    } 
    sessionKey = sessionManager.setClientSession(clientSession) ; 
    clientSession.setSessionKey(sessionKey) ; 

    clientSession.getSendQueue().sendRequest((RegistrationRequest)(element.getValue()));     
    try { 
     response = clientSession.waitAndGetResponse((RegistrationRequest)(element.getValue())) ; 
    } catch (WaitedLongEnoughException e) { 
     return Response.serverError().build() ; 
    } catch (UnableToResolveResponseException e) { 
     return Response.serverError().build() ; 
    } 
    return Response.ok(response).build(); 
} 

的客戶端是一個JUnit測試的情況下，相關的代碼部分是

ClientIdentityConcrete clientIdentity = new ClientIdentityConcrete("username", "password", "secretkey") ; 
RegistrationRequest register = new RegistrationRequest(clientIdentity); 
String jsonStr = mapper.writeValueAsString(clientIdentity); 
HttpPost request = new HttpPost("http://localhost:8081/mCruiseOnCarPool4All/carpool4all/Registration/Request"); 
StringEntity se = new StringEntity(jsonStr); 
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); 
request.setEntity(se); 
HttpResponse response = client.execute(request); 

Answer 1

的問題是在客戶端，JUnit測試案例。我沒有爲註冊創建Json對象，而是使用clientIdentity創建對象。請注意0​​。我還修改了我的整個客戶端，以實際使用JSON客戶端API，而不是傳統的http。目前還沒有工作，我收到了另一個例外。但這是一個不同的問題。

ClientConfig config = new DefaultClientConfig(); 
     Client client = Client.create(config); 
     WebResource service = client.resource(UriBuilder.fromUri(
       "http://localhost:8081/mCruiseOnCarPool4All").build()); 

     ClientIdentityConcrete clientIdentity = new ClientIdentityConcrete("username", "password", "secretkey"); 
     RegistrationRequest register = new RegistrationRequest(clientIdentity); 
     AMessageStrategy response = service.path("carpool4all").path("Registration").path("Request") 
       .type(MediaType.APPLICATION_JSON).post(RegistrationRequest.class, register); 
     assertNotNull(response) ; 
     assertNotNull(((RegistrationResponse)response).getIdentityHash()) ;