🚀 go-pugleaf

On Tue, 03 Jul 2001 09:39:30 -0500, Lifeng wrote:

> The obj.getClass().getName() returns the right name with full
> qualified path name. However, obj instanceof NewEnrolleeOTW
> returns false.
> 
> It can't be caused by different classes with the same name --
> there is only one package contains class NewEnrolleeOTW in
> the whole project. FYI, this NewEnrolleeOTW is a serilazable
> object that passed from a calling object into an EJB. The
> exception occurred in the EJB.

In addition to the the package name and the class name, the identity of 
a class includes the ClassLoader that loaded it.  Is it possible that 
the object was instantiated using a class from a different ClassLoader 
than the code doing the testing?  In that case, the object *is* of a 
different class.  "instanceof" will return false and a cast will fail.  

I am not an expert on EJBs, but I do know that EJB containers use 
multiple ClassLoader instances to keep code separate.

Try evaluating the following expression in that context:

   obj.getClass().getClassLoader() == NewEnrolleeOTW.getClassLoader()

If this evaluates to false, then that is your problem.

-- 
Regards,

John McGrath [TeamB]

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