|Developer(s)||Apache Software Foundation|
|Stable release||1.0.55 / December 31, 2005|
|License||Apache License 2.0|
As of January 16, 2011 Apache ObJectRelationalBridge has been retired.
OJB is an open source project. It is lightweight and easy to use requiring simply configure two files to implement a persistence layer. It is easy to integrate into an existing application because it does not generate code. It allows the use of different patterns of persistence: owner (PersistenceBroker API), JDO and Object Data Management Group (ODMG).
OJB uses an XML based Object/Relational mapping. The mapping resides in a dynamic MetaData layer, which can be manipulated at runtime through a simple Meta-Object-Protocol (MOP) to change the behaviour of the persistence kernel.
At least two files are required to configure OJB: OJB.properties and repository.xml
For mapping a 1-1 relationship, for example, you have two tables: person and account. In this case, a person has an account and vice versa.
- - Linux Today - Internetnews.com: Apache releases Object Relational Bridge
- Apache ObJectRelationalBridge (OJB), Apache Software Foundation.