org.hibernate.id
Interfaces 
Configurable
IdentifierGenerator
PersistentIdentifierGenerator
PostInsertIdentifierGenerator
PostInsertIdentityPersister
Classes 
AbstractPostInsertGenerator
AbstractUUIDGenerator
Assigned
ForeignGenerator
GUIDGenerator
IdentifierGeneratorFactory
IdentityGenerator
IncrementGenerator
MultipleHiLoPerTableGenerator
SelectGenerator
SequenceGenerator
SequenceHiLoGenerator
TableGenerator
TableHiLoGenerator
UUIDHexGenerator
Exceptions 
IdentifierGenerationException