Java Universal Binding: Storing Java Objects in Relational and Object-Oriented Databases

We introduce JUB (Java Universal Binding), a software tool that stores Java objects in relational and object-oriented databases. JUB supports the object-oriented DBMS O2, the relational DBMS Oracle and Sybase, and all the relational databases which can be accessed via JDBC. In the context of O2, Java objects stored in the database are first-class database objects: they can be accessed by all the clients of O2 (O2 supports application programs written in C, C++, Smalltalk, and O2C). We describe JUB from the application programmer’s point of view. We discuss the architecture of JUB, and the way in which Java classes and objects are translated into O2 types and objects. We describe the current status and the performance of the product.