I am using generated JAXB generated classes in GWT by including the
JAXB source to the GWT compiler as you described. I needed to remove
a number of JAXB classes, e.g. XmlGregorianCalendar. I include the
Adapter classes in the source path and gwt complains when compiling
them with errors like "No source code is available for type
javax.xml.bind.annotation.adapters.XmlAdapter<ValueType,BoundType>;
did you forget to inherit a required module?...Removing invalidated
units" but it still works.