ObJectRelationalBridge (OJB) is an Object/Relational mapping tool that allows transparent persistence for Java objects against relational databases. It supports multiple persistence APIs, including JDO, ODMG, and several custom alternatives.
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OJB now supports the JTA Transaction API which allows easy integration into J2EE App Servers. This release has also added a reverse engineering tool that helps to build mapping repositories for existing database tables.
