Return the Java type of the parameter. Values bound to the
parameter must be assignable to this type.
This method is required to be supported for criteria queries
only. Applications that use this method for Java
Persistence query language queries and native queries will
not be portable.
the Java type of the parameter
java.lang.IllegalStateException - if invoked on a parameter
obtained from a query language
query or native query when the implementation does
not support this use