db4o Developer Community

Java enterprise development with db4o Java™ developers can get a lot of mileage out of storing objects directly in an object-oriented database like db4o. Without support for transactions or the ability to use data in a distributed environment (and keep it secure), however, you probably won't have much use for the OODBMS. In this final installment ...

Inheritance and polymorphism in db4o Object-oriented applications make considerable use of inheritance, and they frequently want to use that inheritance (or ''is-a'') relationship to categorize and organize objects within a given system. This can prove difficult in a relational storage scheme, which has no intrinsic concept of inheritance, ...