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vortex_array/arrays/varbin/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::VarBinArray;
8use crate::arrays::VarBinVTable;
9use crate::vtable::ValidityHelper;
10use crate::vtable::VisitorVTable;
11use crate::vtable::validity_nchildren;
12use crate::vtable::validity_to_child;
13
14impl VisitorVTable<VarBinVTable> for VarBinVTable {
15    fn visit_buffers(array: &VarBinArray, visitor: &mut dyn ArrayBufferVisitor) {
16        // TODO(ngates): sliced bytes?
17        visitor.visit_buffer_handle("bytes", array.bytes_handle());
18    }
19
20    fn nbuffers(_array: &VarBinArray) -> usize {
21        1
22    }
23
24    fn visit_children(array: &VarBinArray, visitor: &mut dyn ArrayChildVisitor) {
25        visitor.visit_child("offsets", array.offsets());
26        visitor.visit_validity(array.validity(), array.len());
27    }
28
29    fn nchildren(array: &VarBinArray) -> usize {
30        1 + validity_nchildren(array.validity())
31    }
32
33    fn nth_child(array: &VarBinArray, idx: usize) -> Option<ArrayRef> {
34        match idx {
35            0 => Some(array.offsets().clone()),
36            1 => validity_to_child(array.validity(), array.len()),
37            _ => None,
38        }
39    }
40}