Excessive NullPointerException in Mapper.getId()

[xtracoder]

Would it be possible to rewrite this piece of code without throwing exception in known cases?

public Object getId(final Object entity) {
    Object unwrapped = entity;
    if (unwrapped == null) {
        return null;
    }
    unwrapped = ProxyHelper.unwrap(unwrapped);
    try {
        return getMappedClass(unwrapped.getClass()).getIdField().get(unwrapped);
    } catch (Exception e) {
        return null;
    }
}

The known case is - getIdField() may return null and that consecutively throws NPE in .get().
In IDE with enabled capture of NullPointerException's debugging of code which uses Morpha is somewhat annoying.