Failed to return Java object !

[ericmacau]

Hello,

Can JBossWS return a Java object(Java Bean) ? When I try to return a bean, it just raised the following exception. But those primitive types and String are no problem at all. The following are my codes:

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.xml.rpc.Service;

import eric.ws.reales.CategoryInterface;
import eric.ws.reales.ProductCategory;


/**
 * Client.java
 *
 * @author Chao Hoi Ka, Eric
 *
 */
public class Client {
 private static CategoryInterface port;

 /**
 * @param args
 */
 public static void main(String[] args) {
 try {
 InitialContext iniCtx = getInitialContext();
 Service service = (Service) iniCtx
 .lookup("java:comp/env/service/CategoryService");
 port = (CategoryInterface) service.getPort(CategoryInterface.class);

 port.addCategory(1, "testing", "tesing again");
 port.addCategory(1, "testingx", "tesing againx");

 System.out.println("<<<<"+port.echo("welcome"));


 ProductCategory cat = port.findById(1);
 System.out.println(">>>>" + cat.getName());

 } catch (Exception e) {
 e.printStackTrace();
 }

 }

 protected static InitialContext getInitialContext(String clientName)
 throws NamingException {
 InitialContext iniCtx = new InitialContext();
 Hashtable env = iniCtx.getEnvironment();
 env.put(Context.URL_PKG_PREFIXES, "org.jboss.naming.client");
 env.put("j2ee.clientName", clientName);
 return new InitialContext(env);
 }

 /**
 * Get the client's env context
 */
 protected static InitialContext getInitialContext() throws NamingException {
 return getInitialContext("jbossws-client");
 }

}

....

@WebMethod
public ProductCategory findById(long id) {
 Object obj = em.find(ProductCategory.class, id);

 if (obj != null) {
 return (ProductCategory)obj;
 } else {
 return null;
 }
}

...

The following are the generated codes by wstools.

/*
 * JBossWS WS-Tools Generated Source
 *
 * Generation Date: Fri May 12 15:50:00 GMT+08:00 2006
 *
 * This generated source code represents a derivative work of the input to
 * the generator that produced it. Consult the input for the copyright and
 * terms of use that apply to this source code.
 */

package eric.ws.reales;


public class ProductCategory
{

protected java.lang.String description;

protected long id;

protected java.lang.String name;

protected eric.ws.reales.Collection products;
public ProductCategory(){}

public ProductCategory(java.lang.String description, long id, java.lang.String name, eric.ws.reales.Collection products){
this.description=description;
this.id=id;
this.name=name;
this.products=products;
}
public java.lang.String getDescription() { return description ;}

public void setDescription(java.lang.String description){ this.description=description; }

public long getId() { return id ;}

public void setId(long id){ this.id=id; }

public java.lang.String getName() { return name ;}

public void setName(java.lang.String name){ this.name=name; }

public eric.ws.reales.Collection getProducts() { return products ;}

public void setProducts(eric.ws.reales.Collection products){ this.products=products; }

}

/*
* JBoss, the OpenSource EJB server
* Distributable under LGPL license. See terms of license at gnu.org.
*/

//Auto Generated by jbossws - Please do not edit!!!

package eric.ws.reales;


import javax.xml.rpc.*;


public interface CategoryService extends javax.xml.rpc.Service
{

 public eric.ws.reales.CategoryInterface getCategoryInterfacePort() throws ServiceException;

}

/*
 * JBossWS WS-Tools Generated Source
 *
 * Generation Date: Fri May 12 15:50:00 GMT+08:00 2006
 *
 * This generated source code represents a derivative work of the input to
 * the generator that produced it. Consult the input for the copyright and
 * terms of use that apply to this source code.
 */
package eric.ws.reales;
public interface CategoryInterface extends java.rmi.Remote
{

 public void addCategory(long long_1,java.lang.String string_1,java.lang.String string_2) throws java.rmi.RemoteException;
 public void deleteCategory(long long_1) throws java.rmi.RemoteException;
 public java.lang.String echo(java.lang.String string_1) throws java.rmi.RemoteException;
 public eric.ws.reales.ProductCategory findById(long long_1) throws java.rmi.RemoteException;
 public eric.ws.reales.ProductCategory findByName(java.lang.String string_1) throws java.rmi.RemoteException;
 public void updateCategory(long long_1,java.lang.String string_1,java.lang.String string_2) throws java.rmi.RemoteException;
}

java.rmi.RemoteException: Call invocation failed with code [Client] because of: javax.xml.rpc.JAXRPCException: Cannot create or send response message; nested exception is:
 javax.xml.rpc.soap.SOAPFaultException: javax.xml.rpc.JAXRPCException: Cannot create or send response message
 at org.jboss.ws.jaxrpc.CallImpl.invokeInternal(CallImpl.java:715)
 at org.jboss.ws.jaxrpc.CallImpl.invoke(CallImpl.java:398)
 at org.jboss.ws.jaxrpc.CallProxy.invoke(CallProxy.java:164)
 at $Proxy2.findById(Unknown Source)
 at test.Client.main(Client.java:46)
Caused by: javax.xml.rpc.soap.SOAPFaultException: javax.xml.rpc.JAXRPCException: Cannot create or send response message
 at org.jboss.ws.jaxrpc.SOAPFaultExceptionHelper.getSOAPFaultException(SOAPFaultExceptionHelper.java:100)
 at org.jboss.ws.binding.soap.SOAPBindingProvider.unbindResponseMessage(SOAPBindingProvider.java:505)
 at org.jboss.ws.jaxrpc.CallImpl.invokeInternal(CallImpl.java:704)
 ... 4 more

[ericmacau]

The above exception happened when calling "ProductCategory cat = port.findById(1);"