About empty

api-jpa

javax.persistence.criteria.Join

A join to an entity, embeddable, or basic type.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.From

Represents a bound type, usually an entity that appears in the from clause, but may also be an embeddable belonging to an entity in the from clause.(Interface of JPA)

 
forum_thread

Removing an entity throws exception

Hi all, I'm testing ObjectDB for my project, but I have troubles with it. At this time I'm not able to remove customer entity, when it's read by a query (it's attached), it throws this exception: Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: com.objectdb.o._RollbackException: Failed to commit transaction: 51 ... ... Only address is filled, itemList and otherItemList are empty. The query: em. createQuery ( "select c from ... create new project as a test case for this bug, with new empty db it works correctly. The objectdb doctor analysis has not found an ...

 
issue

spuriously objectdb objects have null references

from time to time we have in a multi threaded environment objects where all the references are null (i.e. references actions, childNodes), even after a subsequent refresh. we are using a separate entityManager per thread and have a central point where we encapsulated all the needed entitymanager methods and protected them with synchronized like:   ... ... (after detachment) between a collection that is really empty and a collection that was just not loaded. You may avoid this by ... command line JVM argument. If you just prefer an empty collection instead of null it wouldn't be difficult to enable such an ...

 
api-jpa

javax.persistence.criteria.PluralJoin

The PluralJoin interface defines functionality that is common to joins to all collection types.(Interface of JPA)

 
release

2.3.1

... Fixed a NullPointerException in querying an empty database . Fixed a online backup file lock problem . ...

 
api-jpa

javax.persistence.criteria.ListJoin

The ListJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a java.util.List.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.MapJoin

The MapJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a java.util.Map.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.Root

A root type in the from clause.(Interface of JPA)

 
api-jpa

javax.persistence.criteria.SetJoin

The SetJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a java.util.Set.(Interface of JPA)