About change

release

2.2.2

Release date: 2011-04-22 Download (5.07 MB) Binary:  objectdb-2.2.2.zip You should start by following a  tutorial or reading the manual ...

 
api-jdo

javax.jdo.spi.PersistenceCapable

A class that can be managed by a binary-compatible JDO implementation must implement this interface.(Interface of JDO)

 
release

2.3.0

... criteria queries. Fixed a bug in collection change tracking in a new entity object. Fixed merging entity ...

 
release

2.2.8

... criteria queries. Fixed a bug in collection change tracking in a new entity object. Fixed merging entity ...

 
forum_thread

Compare old and new schema

Hello, I have an old database file with important data. Over time, I have modified some of the entity classes but did not keep track of the changes. Some fields may have been renamed or removed, some classes may have been renamed or changed package. Is there a way for me to check what "format" the entity classes have in the old database file and compare that with the new classes definitions?   Thanks, farid #1 2015-02-13 13:10 Hello, I have an old database file with important data. Over time, I have modified some of the entity cla ...

 
forum_thread

Merge on detached entities

Hello, it is possible to merge detached entities? There are some attached entities which load from the database. The transaction is finished and the entities become detached. In a new transaction the fields of the detached entities will be changed and a merge by em.merge(entity) will be saved the entities. Can this works correctly? How are the rules of the merge process? Do the changed fields of the detached entity overwrite the fields in the database? Also changed fields which are set to null? #1 2017-09-19 09:54 Hello, it is possible to merge detached entities? There are some attached entities which load fro ...

 
api-jpa

refresh(entity, lockMode)

Refresh the state of the instance from the database, overwriting changes made to the entity, if any, and lock it with respect to given lock mode type.(Method of javax.persistence.EntityManager)

 
manual

[ODB1] Chapter 6 - Persistent Objects

Shows how to store, retrieve, update and delete database objects. ... used to manipulate the garbage collector thread (i.e. to change priority, to wait until it finishes, and so on). Even if you do not ... Changing Object States An object's state can change either implicitly or explicitly. Implicit changes occur when its fields ...

 
release

2.2.3

Release date: 2011-04-29 Download (5.07 MB) Binary:  objectdb-2.2.3.zip You should start by following a  tutorial or reading the manual ...

 
release

2.3.1

... criteria queries. Fixed a bug in collection change tracking in a new entity object. Fixed merging entity ...