Java version of sqlxml

[Tom Purl]

There's a great article in the May edition of Dr. Dodd's Journal about creating XML "views" of relational data. Basically, you created an xsd file as a map to your rdbms and query your data using the XPath query language.
The problem is that the examples in the magazine used C# and other MS proprietary technologies, like sqlxml and ADO.net. Does anyone know of any Java libraries that would allow me to treat relational data like xml if I put an xsd bridge in the middle?
Thanks!