public int hashCode() {
        int hash = 7;
        hash = 31 * hash + (int) personNum;
        hash = 31 * hash + (null == globalNum ? 0 : globalNum.hashCode());
        return hash;
    }
Used for the querying of static fields.
querydsl-jdo/src/test/java/com/querydsl/jdo/models/company/Person.java