ClassCastException using Dataobjects

Question

Hello,
at first, I am not sure if I am in the right forum.
We have developed an application which is using a Stateless SessionBean for getting data (countries) out of the database (using eclipselink).
On filling a list of select items we are getting a ClassCastException although the classes are identical (same package, same class name)
My first Taskflow just checks some conditions and if everything is right it calles Tasklow A or Taskflow B.
Taskflow A now shows some screens and on one screen, the controller (my managed bean) reads the countries out of the database using the Stateless SessionBean.
The interface of this SessionBean method is java.util.List<ICountry) bean.getListOfCountries().
The managed bean now tries to convert this list of Country objects into a list of SelectItems for displaying a selectOneChoice component.
List<SelectItem> countries = new ArrayList<SelectItem>();
List<ICountry> listOfCountries = statelessSessionBean.getListOfCountries();
for (int i=0;i<listOfCountries.size();i++) {
ICountry country = listOfCountries.get(i); <----- the ClassCastException occurs
SelectItem item = new SelectItem();
item.setLabel(country.getIsoCode());
item.setValue(country.getIsoCode());
item.setDescription(resourceBundle.getString("country." + country.getIsoCode()));
countries.add(item);
The data is read from the database and passed to the managed bean correctly. I have a List of ICountry objects in my managed bean.
When I now try to cast one of these objects to the Interface ICountry, the system throws a ClassCastException my.data.ICountry cannot be cast to my.data.ICountry
As far as I found out, the classes are loaded by different classloaders.
GenericClassLoader
ChangeAwareClassLoader
I have no idea, how to change the project settings to overcome this problem.
My Application is divided into several projects
Application: TestApp (ear)
Project: TestApp (contains a single JSF with a region for the outer Taskflow) (war)
Controller1 (contains the outer Taskflow) (ADF Shared Library)
Controller2 (contains the inner Taskflows which does the work) (ADF Shared Library)
DataObjects(contains my interfaces and data objects ICountry, Country) (jar)
SB_Environment (contains the stateless session bean) (ejb-jar)
Can anyone give me a hint?
Environment: Standard JDeveloper 11.1.1.4.0
Regards
Edmund

Answer 1

This release notes for XSQL Servlet 1.0.1 contain the following NOTE:
At this time, the <xsql:insert-param> and <xsql:insert-request> action elements depend on the Oracle JDBC Driver because they depend on the Oracle XML SQL Utility for Java which at present exhibits this restriction. A future release of Oracle XML SQL will remove this current restriction.
The same holds for the <xsql:update-request> and <xsql:delete-request>. The underlying problem is with the XML SQL Utility which currently works fine with any driver for reading data, but fails to insert, update, or delete with drivers other than Oracle. This restriction has already been fixed in-house and will be available as part of the next release of the XML SQL Utility put onto OTN. If the XSQL Servlet is used with that upcoming fixed version of the xsu12.jar for the XML SQL Utility, you will no longer hit this problem.