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From "sameeh harfoush" <sabbath_...@hotmail.com>
Subject ClassCastException when deserializing complex java objects (VOs)
Date Thu, 23 Nov 2006 07:05:51 GMT
I am building a prototype that covers Spring webservices implementation.
I have a SpringProducer web application that provide services and a 
SpringConsumer web application
that uses these services.
everything is working just fine except a ClassCastException when  
deserializing complex java objects that had been serialized by axis.
Also the same error appears when serializing any complex java objects method 
parameters.
I provided in this mail with all the details and classes used including the 
exception stack trace.
My progress is blocked with this error.
NB: i am using asis1.4 (axis release and related jars that came with 
spring-framework-2.0-m4-with-dependencies.zip)
Thank you.

[server-config.xml]
<service name="EmployeeService" provider="java:RPC" style="rpc" 
use="encoded">
  <parameter name="allowedMethods" value="*"/>
  <parameter name="scope" value="Session"/>
  <parameter name="className" 
value="com.softsolutions.springproducer.remote.emp.impl.RemoteEmployeeBOImpl"/>
  <beanMapping qname="SpringProducerServices:EmployeeVO"
   xmlns:SpringProducerServices="http://www.softsolutions.fr"
   
languageSpecificType="java:com.softsolutions.springproducer.vo.emp.EmployeeVO"/>
</service>


[Service interface]
package com.softsolutions.springproducer.bo.emp;

import com.softsolutions.springproducer.vo.emp.EmployeeVO;
import com.softsolutions.springproducer.vo.emp.*;

public interface EmployeeBO
{
EmployeeVO getEmptyEmployee();
}

[Service interface implementation]
package com.softsolutions.springproducer.bo.emp.impl;

import java.util.*;

import com.softsolutions.common.base.*;
import com.softsolutions.springproducer.bo.emp.*;
import com.softsolutions.springproducer.dao.emp.*;
import com.softsolutions.springproducer.vo.emp.*;

public class EmployeeBOImpl
extends BaseBO implements EmployeeBO
{
private EmployeeDAO employeeDAO;

public EmployeeVO getEmptyEmployee()
{
  //dummy application no DB access
  return new EmployeeVO();
}

public void setEmployeeDAO(EmployeeDAO employeeDAO)
{
  this.employeeDAO = employeeDAO;
}

public EmployeeDAO getEmployeeDAO()
{
  return employeeDAO;
}

}


[Remote interface:]
package com.softsolutions.springproducer.remote.emp;

import java.rmi.*;
import com.softsolutions.springproducer.vo.emp.EmployeeVO;

public interface RemoteEmployeeBO
extends Remote
{
EmployeeVO getEmptyEmployee()
  throws RemoteException;
}


[Remote interface implementation]
package com.softsolutions.springproducer.remote.emp.impl;

import org.springframework.remoting.jaxrpc.ServletEndpointSupport;
import com.softsolutions.springproducer.remote.emp.RemoteEmployeeBO;
import com.softsolutions.springproducer.vo.emp.EmployeeVO;
import java.rmi.RemoteException ;
import com.softsolutions.springproducer.bo.emp.EmployeeBO;
import org.springframework.context.ApplicationContext;

public class RemoteEmployeeBOImpl
extends ServletEndpointSupport implements RemoteEmployeeBO
{
private EmployeeBO employeeBO = null;
ApplicationContext appContext = null;
protected void onInit()
{
  appContext = getApplicationContext();
  employeeBO = (EmployeeBO) appContext.getBean("employeeBO");
}

public EmployeeVO getEmptyEmployee()
  throws RemoteException
{
  return employeeBO.getEmptyEmployee();
}
}


[EmployeeVO Class:]
package com.softsolutions.springproducer.vo.emp;

import java.util.*;
import java.io.Serializable;

public class EmployeeVO implements Serializable
{
private Integer id;
private String name;
private String address;
private Date applicationDate;
private String telephone;

public Integer getId()
{
  return id;
}

public String getName()
{
  return name;
}

public String getAddress()
{
  return address;
}

public Date getApplicationDate()
{
  return applicationDate;
}

public String getTelephone()
{
  return telephone;
}

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

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

public void setAddress(String address)
{
  this.address = address;
}

public void setApplicationDate(Date applicationDate)
{
  this.applicationDate = applicationDate;
}

public void setTelephone(String telephone)
{
  this.telephone = telephone;
}

}


[BO bean in client BOContext.xml]
<bean id="employeeBORPC" 
class="com.softsolutions.springconsumer.proxy.EmployeeRpcProxyFactoryBean">
  <property name="wsdlDocumentUrl">
    
<value>http://10.1.6.109:7003/SpringProducer/services/EmployeeService?wsdl</value>
  </property>
  <property name="namespaceUri">
    
<value>http://10.1.6.109:7003/SpringProducer/services/EmployeeService</value>
  </property>
  <property name="serviceName">
    <value>RemoteEmployeeBOImplService</value>
  </property>
  <property name="portName">
    <value>EmployeeService</value>
  </property>
  <property name="serviceInterface">
    <value>com.softsolutions.springproducer.bo.emp.EmployeeBO</value>
  </property>
  <property name="portInterface">
    <value>com.softsolutions.springproducer.remote.emp.RemoteEmployeeBO 
</value>
  </property>
</bean>


[Registering complex types]
package com.softsolutions.springconsumer.proxy;

import org.springframework.remoting.jaxrpc.*;
import javax.xml.rpc.Service;
import javax.xml.namespace.QName;
import org.apache.axis.encoding.ser.BeanSerializerFactory;
import org.apache.axis.encoding.ser.BeanDeserializerFactory ;
import javax.xml.rpc.encoding.TypeMapping;
import javax.xml.rpc.encoding.TypeMappingRegistry;
import com.softsolutions.springproducer.vo.emp.EmployeeVO;

public class EmployeeRpcProxyFactoryBean
extends JaxRpcPortProxyFactoryBean
{
protected void postProcessJaxRpcService(Service service)
{
  TypeMappingRegistry registry = service.getTypeMappingRegistry ();
  TypeMapping mapping = registry.createTypeMapping();
  registerBeanMapping(mapping, EmployeeVO.class, "EmployeeVO");
  registry.register("http://schemas.xmlsoap.org/soap/encoding/ ", mapping);
}

protected void registerBeanMapping(TypeMapping mapping, Class type, String 
name)
{
  QName qName = new QName("http://www.softsolutions.fr", name);
  mapping.register (type, qName,
                   new BeanSerializerFactory(type, qName),
                   new BeanDeserializerFactory(type, qName));
}
}


I am injecting the employeeBORPC bean as 
com.softsolutions.springproducer.bo.emp.EmployeeBO
and when calling the getEmptyEmployee() method the following error is 
generated

java.lang.ClassCastException
        at 
weblogic.xml.schema.binding.RuntimeUtils.getDeserializer(RuntimeUtils.java:363)
        at 
weblogic.xml.schema.binding.RuntimeUtils.invoke_deserializer(RuntimeUtils.java:425)
        at 
weblogic.xml.schema.binding.RuntimeUtils.invoke_deserializer(RuntimeUtils.java:328)
        at weblogic.webservice.core.DefaultPart.toJava(DefaultPart.java:384)
        at weblogic.webservice.core.DefaultMessage.toJava 
(DefaultMessage.java:484)
        at 
weblogic.webservice.core.ClientDispatcher.receive(ClientDispatcher.java:325)
        at 
weblogic.webservice.core.ClientDispatcher.dispatch(ClientDispatcher.java:144)
        at 
weblogic.webservice.core.DefaultOperation.invoke(DefaultOperation.java:457)
        at 
weblogic.webservice.core.DefaultOperation.invoke(DefaultOperation.java:443)
        at weblogic.webservice.core.rpc.StubImpl._invoke (StubImpl.java:303)
        at weblogic.webservice.core.rpc.StubImpl.invoke(StubImpl.java:247)
        at $Proxy10.getEmptyEmployee(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke (Method.java:324)
        at 
org.springframework.remoting.rmi.RmiClientInterceptorUtils.doInvoke(RmiClientInterceptorUtils.java:103)
        at 
org.springframework.remoting.rmi.RmiClientInterceptorUtils.invoke(RmiClientInterceptorUtils.java

:71)
        at 
org.springframework.remoting.jaxrpc.JaxRpcPortClientInterceptor.invoke(JaxRpcPortClientInterceptor.java:530)
        at 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java

:170)
        at 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)
        at $Proxy11.getEmptyEmployee(Unknown Source)
        at 
com.softsolutions.springconsumer.web.struts.emp.action.EmployeeGridAction.loadEmpList 
(EmployeeGridAction.java:27)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke 
(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at 
org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:274)
        at com.softsolutions.common.base.BaseAction.dispatchMethod 
(BaseAction.java:533)
        at 
org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:194)
        at 
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
        at 
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
        at 
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
        at org.apache.struts.action.ActionServlet.doPost 
(ActionServlet.java:432)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at 
weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run 
(ServletStubImpl.java:1006)
        at 
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419)
        at 
weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315)
        at 
weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6718)
        at 
weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at 
weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
        at 
weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3764)
        at weblogic.servlet.internal.ServletRequestImpl.execute 
(ServletRequestImpl.java:2644)
        at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
        at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)



Deployment order under BEA8.1 SP4:
....
axis.jar
jaxrpc.jar
wsdl4j-1.5.1.jar
webservices.jar
.....
Note that this order is set in class path of startWebLogic.cmd

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