@Override
public MorphiaIterator<T, T> fetchEmptyEntities(final FindOptions options) {
QueryImpl<T> cloned = cloneQuery();
cloned.getOptions().projection(new BasicDBObject(Mapper.ID_KEY, 1));
cloned.includeFields = true;
return cloned.fetch();
}
@Override
public MorphiaKeyIterator<T> fetchKeys(final FindOptions options) {
QueryImpl<T> cloned = cloneQuery();
cloned.getOptions().projection(new BasicDBObject(Mapper.ID_KEY, 1));
cloned.includeFields = true;
return new MorphiaKeyIterator<T>(
ds, cloned.prepareCursor(options), ds.getMapper(), clazz, dbColl.getName());
}
@Override
public QueryImpl<T> cloneQuery() {
final QueryImpl<T> n = new QueryImpl<T>(clazz, dbColl, ds);
n.cache = ds.getMapper().createEntityCache(); // fresh cache
n.includeFields = includeFields;
n.setQuery(n); // feels weird, correct?
n.validateName = validateName;
n.validateType = validateType;
n.baseQuery = copy(baseQuery);
n.options = options != null ? options.copy() : null;
// fields from superclass
n.setAttachedTo(getAttachedTo());
n.setChildren(getChildren() == null ? null : new ArrayList<Criteria>(getChildren()));
return n;
}