vortex_array/arrays/bool/compute/
cast.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_dtype::DType;
5use vortex_error::VortexResult;
6
7use crate::array::ArrayRef;
8use crate::arrays::{BoolArray, BoolVTable};
9use crate::compute::{CastKernel, CastKernelAdapter};
10use crate::register_kernel;
11use crate::vtable::ValidityHelper;
12
13impl CastKernel for BoolVTable {
14    fn cast(&self, array: &BoolArray, dtype: &DType) -> VortexResult<Option<ArrayRef>> {
15        if !matches!(dtype, DType::Bool(_)) {
16            return Ok(None);
17        }
18
19        let new_nullability = dtype.nullability();
20        let new_validity = array
21            .validity()
22            .clone()
23            .cast_nullability(new_nullability, array.len())?;
24        Ok(Some(
25            BoolArray::from_bool_buffer(array.boolean_buffer().clone(), new_validity).to_array(),
26        ))
27    }
28}
29
30register_kernel!(CastKernelAdapter(BoolVTable).lift());
31
32#[cfg(test)]
33mod tests {
34    use rstest::rstest;
35    use vortex_dtype::{DType, Nullability};
36
37    use crate::arrays::BoolArray;
38    use crate::compute::cast;
39    use crate::compute::conformance::cast::test_cast_conformance;
40
41    #[test]
42    fn try_cast_bool_success() {
43        let bool = BoolArray::from_iter(vec![Some(true), Some(false), Some(true)]);
44
45        let res = cast(bool.as_ref(), &DType::Bool(Nullability::NonNullable));
46        assert!(res.is_ok());
47        assert_eq!(res.unwrap().dtype(), &DType::Bool(Nullability::NonNullable));
48    }
49
50    #[test]
51    #[should_panic]
52    fn try_cast_bool_fail() {
53        let bool = BoolArray::from_iter(vec![Some(true), Some(false), None]);
54        cast(bool.as_ref(), &DType::Bool(Nullability::NonNullable)).unwrap();
55    }
56
57    #[rstest]
58    #[case(BoolArray::from_iter(vec![true, false, true, true, false]))]
59    #[case(BoolArray::from_iter(vec![Some(true), Some(false), None, Some(true), None]))]
60    #[case(BoolArray::from_iter(vec![true]))]
61    #[case(BoolArray::from_iter(vec![false, false]))]
62    fn test_cast_bool_conformance(#[case] array: BoolArray) {
63        test_cast_conformance(array.as_ref());
64    }
65}
vortex_array/arrays/bool/compute/cast.rs

vortex_array/arrays/bool/compute/
cast.rs
