public Person_login createPerson(Person_login p) {
DBObject doc = PersonConverter.toDBObject(p);
this.col.insert(doc);
ObjectId id = (ObjectId) doc.get("_id");
p.setId(id.toString());
return p;
}
public void updatePerson(Person_login p) {
DBObject query = BasicDBObjectBuilder.start().append("_id", new ObjectId(p.getId())).get();
this.col.update(query, PersonConverter.toDBObject(p));
}