I tried the OrientDB Object Database API, which allows to use register Java POJOs to the database with entityManager.registerEntityClasses(packagename)
and then read write them with minimal extra effort.
However, what I would like to achieve is to register my Java POJOs as Vertices in a graph. Is there some mapping available for registering Java POJOs as Vertices?
Sorry, GraphAPI can't be bound to Object Database API. You could use TinkerPop Frames for this purpose.