- From: Henry Story <henry.story@bblfish.net>
- Date: Wed, 10 May 2006 00:02:51 +0200
- To: Semantic Web <semantic-web@w3.org>
Hi, I just started an open source project called Sommer at https:// sommer.dev.java.net under a BSD licence. The code is just being forged right now, but feedback and ideas are welcome on the users mailing list. The idea is simply to use java annotations with simple Aspect Oriented Programing to map java object graphs to and from an RDF Graph. All a java programmer will need to do is annotate his classes and its fields like this: @RDF(Person.foaf+"Person") class Person { static final String foaf = "http://xmlns.com/foaf/0.1/"; @RDF(foaf+"knows") @Multiple Collection<Person> knows; @RDF(foaf+"name") String name; //assuming we only have 1 name @RDF(foaf+"mbox") @Multiple Collection<URI> mboxes; ... boolean knows(Person p) { if (knows == null) knows = new ArrayList<Person>(); return knows.contains(p); } ... } The rest will be taken care of by AOP. Currently I am developing this using Sesame. Though it should of course be possible to map this to Jena or any other Semantic Web library. I am developing this with the Javassist [1] AOP framework, though others could and should be able to use any other framework as well (I just had to start with something!). Hopefully I will have something solid enough for me to develop a new version of BlogEd [2] in a couple of weeks. I'll report back here as soon as I get there. The more I work on this the more surprised I am at how well Java OO programming and RDF fit together. Henry Story I have written a little more about it here: http://blogs.sun.com/roller/page/ bblfish#sommer_semantic_object_metadata_mapper [1] http://www-128.ibm.com/developerworks/java/library/j-dyn0610/ [2] https://bloged.dev.java.net/
Received on Tuesday, 9 May 2006 22:03:02 UTC