On Mar 9, 5:13 pm, Robert Kluin <[email protected]> wrote:
> Matt,
> db.get(key_list) does return entities in the same order as key_list.
>
Perhaps in Python, but not in Java. The following test asserts the
order is independent of the input order, and prints:
[Kind(1), Kind(2)]
[Kind(1), Kind(2)]
class java.util.HashMap
class java.util.HashMap
It is not surprising that the return order is different from the input
order, since the implementation is a HashMap.
public void testBulkGetKeyOrder() throws Exception {
DatastoreService ds = DatastoreServiceFactory.getDatastoreService();
Key k1 = ds.put(new Entity("Kind"));
Key k2 = ds.put(new Entity("Kind"));
Map<Key,Entity> map_a = ds.get(Arrays.asList(k1, k2));
List<Key> keys_a = new ArrayList<Key>(map_a.keySet());
Map<Key,Entity> map_b = ds.get(Arrays.asList(k2, k1));
List<Key> keys_b = new ArrayList<Key>(map_b.keySet());
// expect key order to be the same, no matter what order we requested
it
assertEquals(keys_a, keys_b);
System.out.println(keys_a);
System.out.println(keys_b);
System.out.println(map_a.getClass());
System.out.println(map_b.getClass());
}
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