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JPA Doc
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javax.persistence.EntityManagerFactory

createEntityManager() Create a new application-managed EntityManager. Create a new application-managed EntityManager. This method returns a new EntityManager instance each time it is invoked. The isOpen ... createEntityManager(Map map) Create a new application-managed EntityManager with the specified Map
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Possible issue with timestamps

.createEntityManager();              Calendar cal1 = new GregorianCalendar(2012, Calendar.MARCH, 29, 0, 5); //fives after midnight         Calendar cal2 = new GregorianCalendar(2012, Calendar.MARCH, 29, 0, 10); //ten after midnight         Calendar cal3 = new GregorianCalendar(2012, Calendar.MARCH, 29, 0
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Persist error @ManyToMany how to define correct entities relationships

= new ArrayList(); } @Entity public class Category implements Serializable { @Id ... the categories of a new product? You should retrieve references to existing Category instances (possibly using em.getReference) rather than create new Category instances. You may also consider using
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Date field Index is corrupted due to time change

_64). Please report this error on http://www.objectdb.com/database/issue/new com.objectdb.o ... ) have been migrated. New database copy is ready at: db/SystemDB.odb.rpmnew     Thank you Emil ... while it is active (the new copy may be corrupted) or copying a database file after abnormal close
JDO Doc
2

javax.jdo.listener.InstanceLifecycleEvent

InstanceLifecycleEvent(Object source, int type) Creates a new event object with the specified source and type. Creates a new event object with the specified source and type. Parameters: source - the instance ... , Object target) Creates a new event object with the specified source, type, and target. Creates a new
JPA Doc
2

javax.persistence.spi.PersistenceUnitInfo

that will be called for every new class definition or class redefinition that gets loaded by the loader ... that will be called for every new class definition or class redefinition that gets loaded by ... Since: JPA 1.0 ClassLoader getNewTempClassLoader() Return a new instance of a ClassLoader
JDO Doc
2

jdoNewInstance(sm)

) Return a new instance of this class, with the jdoStateManager set to the parameter, and jdoFlags set ... reflection to construct a new instance. It is used by the JDOImplHelper class method newInstance. Parameters: sm - the StateManager that will own the new instance. Returns: a new instance of this class
JDO Doc
2

jdoNewInstance(sm, oid)

,   Object oid ) Return a new instance of this class, with the jdoStateManager set to the parameter, key ... a performance optimization as an alternative to using reflection to construct a new instance ... . Parameters: sm - the StateManager that will own the new instance. oid - an instance of the object id
JDO Doc
2

newInstance(pcClass, sm)

Method javax.jdo.spi.JDOImplHelper PersistenceCapable newInstance(   Class pcClass,   StateManager sm ) Create a new instance of the class and assign its jdoStateManager. The new instance ... - the StateManager which will own the new instance. Returns: the new instance, or null if the class is not registered
JDO Doc
2

newInstance(pcClass, sm, oid)

 sm,   Object oid ) Create a new instance of the class and assign its jdoStateManager and key values from the ObjectId. If the oid parameter is null, no key values are copied. The new instance ... - the StateManager which will own the new instance. oid - the ObjectId instance from which to copy key field