JAXB Bindings File Sets @XmlElement type to String instead of XMLGregorianCalendar

I'm trying to create an XmlAdapter that takes in an XMLGregorianCalendar and outputs an XMLGregorianCalendar. The purpose is simlply to remove timezone data from the element when unmarshalling data.

It looks like this:

public class TimezoneRemoverAdapter extends XmlAdapter<XMLGregorianCalendar, XMLGregorianCalendar> {
    public XMLGregorianCalendar unmarshal(XMLGregorianCalendar xgc) {
        if(xgc == null) {
            return null;
        }
        xgc.setTimezone(DatatypeConstants.FIELD_UNDEFINED);
        return xgc;
    }

    public XMLGregorianCalendar marshal(XMLGregorianCalendar xgc) {
        return xgc;
    }
}

This works fine for the following code:

public class FooElement {
    @XmlElement(name="bar-date")
    @XmlJavaTypeAdapter(TimezoneRemoverAdapter.class)
    @XmlSchemaType(name = "date")
    protected XMLGregorianCalendar barDate;
}

Unfortunately, when I generate the code using a jaxb-bindings.xml file, the above code looks like this:

public class FooElement {
    @XmlElement(name="bar-date", type=java.lang.String.class)
    @XmlJavaTypeAdapter(TimezoneRemoverAdapter.class)
    @XmlSchemaType(name = "date")
    protected XMLGregorianCalendar barDate;
}

It sets the type to String, so my above method doesn't work. The type String setting is overriding the XMLGregorianCalendar type that it should be. I can manually change it, but I'd rather not have to remember to update it every time the jaxb files are regenerated. Does anyone know if there's an option to manually set the @XmlElement type or have it ignored?

Here is the relevant portion of the jaxb-bindings.xml file:

<jxb:b