Sudheesh Katkam created ARROW-1162:
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Summary: Transferring Empty List Should Not Invoke Callback
Key: ARROW-1162
URL: https://issues.apache.org/jira/browse/ARROW-1162
Project: Apache Arrow
Issue Type: Bug
Components: Java - Vectors
Affects Versions: 0.4.1
Reporter: Sudheesh Katkam
Fix For: 0.5.0
Here's the test that fails:
{code}
public class TestBufferOwnershipTransfer {
//...
private static class Pointer<T> {
T value;
}
private static CallBack newTriggerCallback(final Pointer<Boolean> trigger) {
trigger.value = false;
return new CallBack() {
@Override
public void doWork() {
trigger.value = true;
}
};
}
@Test
public void emptyListTransferShouldNotTriggerSchemaChange() {
final BufferAllocator allocator = new RootAllocator(Integer.MAX_VALUE);
final Pointer<Boolean> trigger1 = new Pointer<>();
final Pointer<Boolean> trigger2 = new Pointer<>();
final ListVector v1 = new ListVector("v1", allocator,
FieldType.nullable(ArrowType.Null.INSTANCE),
newTriggerCallback(trigger1));
final ListVector v2 = new ListVector("v2", allocator,
FieldType.nullable(ArrowType.Null.INSTANCE),
newTriggerCallback(trigger2));
v1.makeTransferPair(v2).transfer();
assertFalse(trigger1.value);
assertFalse(trigger2.value); // fails
}
}
{code}
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