RF, ServiceLayerDecorator : The domain type com.test.persistance.entites.base.BaseTest cannot be sent to the client

Hi there,

Sorry about this long question.

I do experience some difficulties playing with GWT RF. ( keywords: Gwt ,Hibernate, Valueproxy, Locator, ServiceLayerDecorator)
i am beginner level.
Will try to be as accurate as possible but i probably may have misunderstood a couple of things and some typo errors can appear because code is simplified.

In brief, when RF is trying to send datas back to the client, i 've got an error.

com.google.web.bindery.requestfactory.server.UnexpectedException: The domain type com.test.persistance.entites.base.BaseTest cannot be sent to the client
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.die(ServiceLayerDecorator.java:216)
    at com.google.web.bindery.requestfactory.server.ResolverServiceLayer.resolveClientType(ResolverServiceLayer.java:91)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveClientType(ServiceLayerDecorator.java:142)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveClientType(ServiceLayerDecorator.java:142)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveClientType(ServiceLayerDecorator.java:142)
    at com.google.web.bindery.requestfactory.server.ServiceLayerDecorator.resolveClientType(ServiceLayerDecorator.java:142)
    at com.test.server.MyDecorator.resolveClientType(MyDecorator.java:22

Call is made by

                requestFactory.createMvtRequest()
                    .findAllMvts()
                    .fire(rec);

 

Receiver used  ( extract )

Receiver<List<MvtProxy>> rec = new Receiver<List<MvtProxy>>()
                {  public void onSuccess (List<MvtProxy> mvts) ....

In details :
    Client Side

•  Widget
•  Factory  @Service(value = MvtService.class, locator = MvtServiceLocator.class)
•  MvtProxy as ValueProxy( @ProxyFor(value = Test.class, locator = MvtLocator.class)
  

    Persistance Side

•  Test ( public class Test extends BaseTest )
•  BaseTest ( public class BaseTest  implements Serializable )
  

    Server Side

• MvtService (public class MvtService)
• MvtServiceLocator (public class MvtServiceLocator implements ServiceLocator)
• CEMMvt (public class CEMMvt)
• MyDecorator (public class MyDecorator extends ServiceLayerDecorator)
• MyRequestFactoryServlet (public class MyRequestFactoryServlet extends RequestFactoryServlet)  Replacing RFServlet in web.xml
  

Others infos    

CEMMvt list() method is using a DAO to get the datas from a database and returning a List<Test>. It is well populated.

I previously had the same error "com.google.web.bindery.requestfactory.server.UnexpectedException: The domain type com.test.persistance.entites.Test cannot be sent to the client"
Seems to be resolved by using MyDecorator but whats am i doing wrong in this particular case ?

Many thanks for pointing me in the right direction.

Regards,

pierre
       
MyRequestFactoryServlet :

import com.google.web.bindery.requestfactory.server.DefaultExceptionHandler;
import com.google.web.bindery.requestfactory.server.RequestFactoryServlet;

public class MyRequestFactoryServlet extends RequestFactoryServlet
{
    public MyRequestFactoryServlet() {
        super(new DefaultExceptionHandler(), new MyDecorator());
}
}

        MyDecorator

import com.google.web.bindery.requestfactory.server.ServiceLayerDecorator;
import com.google.web.bindery.requestfactory.shared.Locator;

public class MyDecorator extends ServiceLayerDecorator {

    @Override
    public Class<? extends Locator<?, ?>> resolveLocator(Class<?>
domainType) {
            if(domainType.getName().contains("Test"))
                    return super.resolveLocator(domainType.getSuperclass());
            return super.resolveLocator(domainType);
    }

    @Override
    public <T> Class<? extends T> resolveClientType(Class<?> domainClass,
Class<T> clientType, boolean required) {
            if(domainClass.getName().contains("Test"))
                    return super.resolveClientType(domainClass.getSuperclass(),clientType, required);

            return super.resolveClientType(domainClass, clientType,required);
    }

}

CEMMvt

  public static List<Test> list () {
            if (mvtsDAO == null) {
                HttpServletRequest request = RequestFactoryServlet.getThreadLocalRequest();
                ApplicationContext context = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());
                mvtsDAO =context.getBean(IMvtEnteteDAO.class);

               
            }
            try {
                List<?> tempList = new ArrayList<Test>();
                Map<String, Object> map = new HashMap<String, Object>();
                map.put(Test.PROP_REF_RECEP, "EXAMPLE");
       
                List<Test>  liste = mvtsDAO.loadAllTest(map);
               
                        return liste;
               
            } catch (PersistanceException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return null;
   
      }

Test

public class Test extends BaseTest {
    private static final long serialVersionUID = 1L;

    public Test () {
        super();
    }

    public Test (Long id) {
        super(id);
    }
}

BaseTest

import java.io.Serializable;

public class BaseTest  implements Serializable {
    public static String PROP_ID = "id";
    public static String PROP_REF_RECEP = "ref_recep";

    // Fields   

     private Long id;
     private String refRecep;
 


    // Constructors

    /** default constructor */
    public BaseTest() {
    }

    /** minimal constructor */
    public BaseTest(Long id) {
        this.id = id;
    }
   
    /** full constructor */
    public BaseTest(Long id, String refRecep) {
        this.id = id;
        this.refRecep = refRecep;
 
    }

  
    // Property accessors

    public Long getId() {
        return this.id;
    }
   
    public void setId(Long id) {
        this.id = id;
    }

    public String getRefRecep() {
        return this.refRecep;
    }
   
    public void setRefRecep(String refRecep) {
        this.refRecep = refRecep;
    }
}

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