Cast Exception from EJB returning Collection

Question

Still can't understand why I'm getting a cast exception when I call an object method when the object has been returned in a Collection from an EJB.
The object CountryModel is a serialised object, returned in a Collection from home.findAllCountries.....
I understood RMI returns the object in serialised form, why does called the CountryModel object method getCountryName() cause a ClassCast method? This object casting works ok for a non-rmi application.
Collection boris = home.findAllCountries();
      Iterator i = boris.iterator();
      System.out.println( boris.size());              //gets right results
      while( i.hasNext()) {
        Object obj = i.next();
        CountryModel leModel = (CountryModel)obj;
        System.out.println(leModel.getCountryName());  //causes ClassCastException
      }Any help appreciated. Thanks, lebo

Answer 1

Still can't understand why I'm getting a cast
exception when I call an object method when the object
has been returned in a Collection from an EJB.
The object CountryModel is a serialised object,
returned in a Collection from
home.findAllCountries.....
I understood RMI returns the object in serialised
form, why does called the CountryModel object method
getCountryName() cause a ClassCast method? This
object casting works ok for a non-rmi application.
Collection boris = home.findAllCountries();
Iterator i = boris.iterator();
System.out.println( boris.size());
e());              //gets right results
while( i.hasNext()) {
Object obj = i.next();
CountryModel leModel = (CountryModel)obj;
System.out.println(leModel.getCountryName());
ame());  //causes ClassCastException
}Any help appreciated. Thanks, lebo
Cast exceptions mostly occur when the same class is being loaded by two classloaders, and thus a conflict. I believe that the statement
CountryModel leModel = (CountryModel)obj;
is throwing the exception and not the method call.
Kindly try to check that out.
Moreover instead of using the iterator use the toArray method and then try to access the elements. This would give an indication as what is going wrong.
Kindly do the above and update the topic.
Regards
Rohit Parik
[email protected]