About oid
JPA Primary Key
Explains how to define and use primary keys in JPA, including composite and embedded primary keys. Every entity object that is stored in the database has a primary key. Once assigned, the primary key cannot be modified. It represents the entity object as long as it exists in the database. As an object database, ObjectDB supports implicit o ...
javax.jdo.datastore.DataStoreCache.EmptyDataStoreCache
This class is an empty implementation of the DataStoreCache interface.(Class of JDO)
getObjectById(oid, validate)
This method locates a persistent instance in the cache of instances managed by this PersistenceManager.(Method of javax.jdo.PersistenceManager)
jdoNewInstance(sm, oid)
Return a new instance of this class, with the jdoStateManager set to the parameter, key fields initialized to the values in the oid, and jdoFlags set to LOAD_REQUIRED.(Method of javax.jdo.spi.PersistenceCapable)
javax.jdo.PersistenceManager
PersistenceManager is the primary interface for JDO-aware application components.(Interface of JDO)
javax.jdo.datastore.DataStoreCache
Many JDO implementations allow instances to be cached in a second-level cache, and allow direct management of the cache by knowledgeable applications.(Interface of JDO)
newInstance(pcClass, sm, oid)
Create a new instance of the class and assign its jdoStateManager and key values from the ObjectId.(Method of javax.jdo.spi.JDOImplHelper)
getObjectsById(oids, validate)
Return the objects with the given oids.(Method of javax.jdo.PersistenceManager)
