vortex_array/arrays/listview/vtable/
visitor.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use crate::ArrayBufferVisitor;
5use crate::ArrayChildVisitor;
6use crate::ArrayRef;
7use crate::arrays::ListViewArray;
8use crate::arrays::ListViewVTable;
9use crate::vtable::ValidityHelper;
10use crate::vtable::VisitorVTable;
11use crate::vtable::validity_nchildren;
12use crate::vtable::validity_to_child;
13
14impl VisitorVTable<ListViewVTable> for ListViewVTable {
15    fn visit_buffers(_array: &ListViewArray, _visitor: &mut dyn ArrayBufferVisitor) {
16        // ListView has no byte buffers.
17    }
18
19    fn nbuffers(_array: &ListViewArray) -> usize {
20        0
21    }
22
23    fn visit_children(array: &ListViewArray, visitor: &mut dyn ArrayChildVisitor) {
24        visitor.visit_child("elements", array.elements());
25        visitor.visit_child("offsets", array.offsets());
26        visitor.visit_child("sizes", array.sizes());
27        visitor.visit_validity(array.validity(), array.len());
28    }
29
30    fn nchildren(array: &ListViewArray) -> usize {
31        3 + validity_nchildren(array.validity())
32    }
33
34    fn nth_child(array: &ListViewArray, idx: usize) -> Option<ArrayRef> {
35        match idx {
36            0 => Some(array.elements().clone()),
37            1 => Some(array.offsets().clone()),
38            2 => Some(array.sizes().clone()),
39            3 => validity_to_child(array.validity(), array.len()),
40            _ => None,
41        }
42    }
43}
vortex_array/arrays/listview/vtable/visitor.rs

vortex_array/arrays/listview/vtable/
visitor.rs
