D.1 Optional Features

The JDO specification includes a number of optional features that a JDO implementation may or may not implement. The supportedOptions() method on PersistenceManagerFactory can be used to determine the set of optional features that a JDO implementation supports. It returns a collection of strings, one for each supported feature.

Table D-1 provides a list of these strings.

Table D-1. Optional Features

Optional Feature Name

javax.jdo.option.TransientTransactional

javax.jdo.option.NontransactionalRead

javax.jdo.option.NontransactionalWrite

javax.jdo.option.RetainValues

javax.jdo.option.Optimistic

javax.jdo.option.ApplicationIdentity

javax.jdo.option.DatastoreIdentity

javax.jdo.option.NonDurableIdentity

javax.jdo.option.ArrayList

javax.jdo.option.Hashtable

javax.jdo.option.HashMap

javax.jdo.option.LinkedList

javax.jdo.option.TreeMap

javax.jdo.option.TreeSet

javax.jdo.option.Vector

javax.jdo.option.Map

javax.jdo.option.List

javax.jdo.option.Array

javax.jdo.option.NullCollection

javax.jdo.option.ChangeApplicationIdentity

javax.jdo.query.JDOQL