@SuppressWarnings("unchecked")
@Override
public Set<Person> getTopAncestors() {
Set<Person> topAncestors = new HashSet<Person>();
// Find all the parents
// If a person is in the childrenmap as a key,
// then they are registered as a parent to somebody
em.getTransaction().begin();
TypedQuery q = em.createQuery("select p.parents from Birth p", Person.class);
List<Person> people = (List<Person>) q.getResultList();
em.getTransaction().commit();
for (Person person : people) {
// If a person doesn't have a birth record,
// then there's no record of a parent
System.out.println("Found " + person);
Birth birthRecord = findBirthRecord(person);
if (birthRecord == null || birthRecord.getParents().isEmpty()) {
System.out.println("Adding " + person + " to top ancestors list");
topAncestors.add(person);
}
}
return topAncestors;
}
@Override
public void updateBirth(Birth b) {
em.getTransaction().begin();
Birth target = em.find(Birth.class, b.getId());
target.setCountry(b.getCountry());
target.setEventDate(b.getEventDate());
target.setPerson(b.getPerson());
target.setState_province(b.getState_province());
target.setTown(b.getTown());
target.setParents(b.getParents());
em.merge(target);
em.getTransaction().commit();
}
