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api-jpa

javax.persistence.OptimisticLockException

Thrown by the persistence provider when an optimistic locking conflict occurs.(Exception of JPA)

 
manual

General Settings and Logging

Describes general configuration and logging of the ObjectDB Java object database for JPA and JDO. the ObjectDB General configuration section.... the client side. The default configuration file contains the following <general> element: <general > ...

 
api-jdo

values()

Returns an array containing the constants of this enum type.(Static Method of javax.jdo.annotations.NullValue)

 
forum_thread

Missing Data on Retrieval (0, null values)

I try  to export all Objects in an Flatfile-Hiearchy (.csv). But only the first exported Table contains all necessary Data. Most of the others  contains all  Object-Rows', but most Values of the Columns are missing. With a  em.clear() inside the Loop, all tables are exported correctly but the Enity-Keys do not match. I can't get the point - what am i doing wrong?   emf = Persistence.createEntityManagerFactory(dbFile); em = emf.createEntityManager(); ... (.csv). But only the first exported Table contains all necessary Data. Most of the others  contains all  Object-Rows', but most Values of the Columns are ...

 
forum_thread

How do I achieve a Deep Fetch using JOIN FETCH?

I have an Entity type which is contains a collection of Embeddable objects, which in turn themselves contain a collection of Embeddable objects: @Embeddable class A { String val; }; @Embeddable class B { List<A> aList; }; @Entity class C { @Id long id; List<B> bList; };   Usually I'm content to have the B's and A's be lazily loaded, but I have a circumstance where I need to be able to work with the whole C object, with all its parts, as a detached object. ... I have an Entity type which is contains a collection of Embeddable objects, which in turn themselves contain a ...

 
api-jpa

values()

Returns an array containing the constants of this enum type.(Static Method of javax.persistence.metamodel.PluralAttribute.CollectionType)

 
forum_thread

Persist error @ManyToMany how to define correct entities relationships

I have Product entities containing a list of Category enties. Each product can have multiple Category but all sue the same limited set of Category entities. There is not changes made to Category from Product. The category ID is taken from the webservice Object ID (unique too). #1 2017-01-29 18:06 I have Product entities containing a list of Category enties. Each product can have multiple Category but they ar ...

 
api-jdo

javax.jdo.JDOFatalException

This class represents exceptions that are fatal; that is, the condition that caused it cannot be bypassed even if the operation is retried.(Exception of JDO)

 
api-jdo

javax.jdo.JDOUserException

This class represents user errors that can possibly be retried.(Exception of JDO)

 
api-jdo

javax.jdo.JDONullIdentityException

An instance of this class is thrown when attempting to create an object id when the object id constructor parameter is null.(Exception of JDO)