Jastor is a open source Java code generator that emits Java Beans from Web Ontologies (OWL) enabling convenient, type safe access and eventing of RDF stored in a Jena Semantic Web Framework model. Jastor generates Java interfaces, implementations, factories, and listeners based on the properties and class hierarchies in the Web Ontologies. Jastor is based on several ideas from Automatic Mapping of OWL Ontologies to Java (PDF).
Developed (and apparently used heavily) at IBM, now open. More
to follow I wonder?