With vectors of EJBObjects you cannot use the regular contains() method
since this will use the .equals() method for comparing EJBObjects which is not
valid - isIdentical should be used instead.
Although Vectors are Serializable, their Enumerations
(obtained by the .elements() method)
are not.When a finder query returns an Enumeration it cannot simply return a regular
VectorEnumerator since this class will not marshal properly.
When dealing with collections of EJBObjects, it is wrong to
use standard Vector methods such as indexOf() because
these use .equals insead of the ejb method .isIdentical().
With vectors of EJBObjects you cannot use the regular contains() method
since this will use the .equals() method for comparing EJBObjects which is not
valid - isIdentical should be used instead.