Subject OpenJPA supports Firebird and JayBird.
Author KIMURA, Meiji
Hi All,

OpenJPA Passes Sun JPA TCK 100%! : OpenJPA is now officially compliant with the Java Persistence API
http://incubator.apache.org/openjpa/2007/04/30/openjpa-passes-sun-jpa-tck-100.html

It supports Firebird 1.5 and JayBird JCA/JDBC driver 1.0.1.
http://incubator.apache.org/openjpa/docs/latest/manual/manual.html#dbsupport_firebird_issues

regards,
KIMURA, Meiji(FAMILY, Given)
Tokyo, JAPAN.