The code I'm working on is using `jaxb2-maven-plugin` from `org.codehaus.mojo` to generate Java classes from XSD schema. I'm looking for a way to automatically implement `equals()` and `hashCode()` methods for those classes, but it seems there is not a way. I know that there are other JAXB2 Maven plugins that do that (http://confluence.highsource.org/display/J2B/Home for example), but I was wondering if anyone of you encountered this issue before and if there's a way for fixing it. I'm generating the classes using the `xjc` goal.