Bio
Gavin King is a Distinguished Engineer at Red Hat. He's the creator of Hibernate, a popular persistence solution for Java and of the Ceylon programming language. He contributed to the Java Community Process as JBoss and then Red Hat representative for the EJB and JPA specifications and as spec lead and author of the CDI specification. He's currently a major contributor to the design of Jakarta Data and Jakarta Persistence. He lives in Barcelona with his wife and three daughters. His active interests include theoretical physics and quantum technologies.
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Designing "query by criteria"
One of the great improvements in Hibernate 2.1 is that we finally have a mature Criteria query API. For a very long time I let this feature languish because I just wasn't sure what it should really look like. Every QBC API I've looked at is designed differently and there is certainly nothing like a standard API to learn from. I've seen everything from this:
SDO
We are taking a close look at SDO. It's an interesting spec that comes a bit out of left field. My reading is that it provides a mechanism for manipulating and especially for externalizing graphs of objects or things that look sufficiently close to objects to be meaningfully represented as a graph
. For example, XML.
