In addition to supplying PersistenceManagers, the PersistenceManagerFactory also supplies metadata about the current JDO implementation. The getProperties method returns a Properties instance containing, at a minimum, the following keys:
VendorName: The name of the JDO vendor.
VersionNumber: The version number string for the product.
The supportedOptions method returns a Collection of Strings enumerating the JDO options supported by the implementation. The following option names are recognized:
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.HashMap
javax.jdo.option.Hashtable
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
Vendors may include Strings for other query languages they support as well.
 | Note |
|---|---|
Kodo JDO currently supports all options except javax.jdo.option.NullCollection and javax.jdo.option.ChangeApplicationIdentity. | |