polars_compute/if_then_else/
list.rs

1use arrow::array::growable::{Growable, GrowableList};
2use arrow::array::{Array, ArrayCollectIterExt, ListArray};
3use arrow::bitmap::Bitmap;
4
5use super::{if_then_else_extend, IfThenElseKernel};
6
7impl IfThenElseKernel for ListArray<i64> {
8    type Scalar<'a> = Box<dyn Array>;
9
10    fn if_then_else(mask: &Bitmap, if_true: &Self, if_false: &Self) -> Self {
11        let mut growable = GrowableList::new(vec![if_true, if_false], false, mask.len());
12        unsafe {
13            if_then_else_extend(
14                &mut growable,
15                mask,
16                |g, off, len| g.extend(0, off, len),
17                |g, off, len| g.extend(1, off, len),
18            )
19        };
20        growable.to()
21    }
22
23    fn if_then_else_broadcast_true(
24        mask: &Bitmap,
25        if_true: Self::Scalar<'_>,
26        if_false: &Self,
27    ) -> Self {
28        let if_true_list: ListArray<i64> =
29            std::iter::once(if_true).collect_arr_trusted_with_dtype(if_false.dtype().clone());
30        let mut growable = GrowableList::new(vec![&if_true_list, if_false], false, mask.len());
31        unsafe {
32            if_then_else_extend(
33                &mut growable,
34                mask,
35                |g, _, len| g.extend_copies(0, 0, 1, len),
36                |g, off, len| g.extend(1, off, len),
37            )
38        };
39        growable.to()
40    }
41
42    fn if_then_else_broadcast_false(
43        mask: &Bitmap,
44        if_true: &Self,
45        if_false: Self::Scalar<'_>,
46    ) -> Self {
47        let if_false_list: ListArray<i64> =
48            std::iter::once(if_false).collect_arr_trusted_with_dtype(if_true.dtype().clone());
49        let mut growable = GrowableList::new(vec![if_true, &if_false_list], false, mask.len());
50        unsafe {
51            if_then_else_extend(
52                &mut growable,
53                mask,
54                |g, off, len| g.extend(0, off, len),
55                |g, _, len| g.extend_copies(1, 0, 1, len),
56            )
57        };
58        growable.to()
59    }
60
61    fn if_then_else_broadcast_both(
62        dtype: arrow::datatypes::ArrowDataType,
63        mask: &Bitmap,
64        if_true: Self::Scalar<'_>,
65        if_false: Self::Scalar<'_>,
66    ) -> Self {
67        let if_true_list: ListArray<i64> =
68            std::iter::once(if_true).collect_arr_trusted_with_dtype(dtype.clone());
69        let if_false_list: ListArray<i64> =
70            std::iter::once(if_false).collect_arr_trusted_with_dtype(dtype.clone());
71        let mut growable =
72            GrowableList::new(vec![&if_true_list, &if_false_list], false, mask.len());
73        unsafe {
74            if_then_else_extend(
75                &mut growable,
76                mask,
77                |g, _, len| g.extend_copies(0, 0, 1, len),
78                |g, _, len| g.extend_copies(1, 0, 1, len),
79            )
80        };
81        growable.to()
82    }
83}
polars_compute/if_then_else/list.rs

polars_compute/if_then_else/
list.rs
