codemodel was moved into jaxb in 2013  and the Java 9 issue have been
addressed upstream earlier this year .
With the move to jaxb the groupId and the version number of codemodel
com.sun.codemodel:codemodel:2.6 -> org.glassfish.jaxb:codemodel:2.2.11
src:jaxb should be upgraded to the latest release (2.3.0) and modified
to generate either libcodemodel-java with an epoch (due to the backward
change of the version number) and a pom relocation, or a new codemodel
package (libjaxb-codemodel-java or libglassfish-codemodel-java). Once
this is done src:codemodel can be removed.
This is the maintainer address of Debian's Java team
debian-j...@lists.debian.org for discussions and questions.