About identity
Auto Generated Values
Explains the different strategies for generating auto values (mainly for primary key fields) in JPA.... The Auto Strategy The Identity Strategy The Sequence Strategy The Table ... as explained in the previous section . The Identity Strategy The IDENTITY GenerationType.IDENTITY ...
GenerationType.IDENTITY
Indicates that the persistence provider must assign primary keys for the entity using a database identity column.(Enum Constant of javax.persistence.GenerationType)
javax.jdo.PersistenceManager
PersistenceManager is the primary interface for JDO-aware application components.(Interface of JDO)
javax.jdo.spi.PersistenceCapable
A class that can be managed by a binary-compatible JDO implementation must implement this interface.(Interface of JDO)
javax.jdo.annotations.DatastoreIdentity
Annotation for the datastore identity of the class.(Annotation of JDO)
getObjectId(pc)
The ObjectId returned by this method represents the JDO identity of the instance.(Method of javax.jdo.PersistenceManager)
Is there a function of "drop table" or "delete from table"?
Besides the em.remove() one by one, is there a function of "drop table" or "delete from table"? TIA ... automatic global sequence . The name of an identity sequence (specific per entity class) is entityName + "$identity" . User defined generators ( sequence and table ) have ...
javax.jdo.spi.StateManager
This interface is the point of contact between managed instances of PersistenceCapable classes and the JDO implementation.(Interface of JDO)
javax.jdo.JDOHelper
This class can be used by a JDO-aware application to call the JDO behavior of PersistenceCapable instances without declaring them to be PersistenceCapable.(Class of JDO)
