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vortex_array/arrays/dict/compute/
mask.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_error::VortexResult;
5
6use crate::ArrayRef;
7use crate::IntoArray;
8use crate::array::ArrayView;
9use crate::arrays::Dict;
10use crate::arrays::DictArray;
11use crate::arrays::dict::DictArraySlotsExt;
12use crate::arrays::scalar_fn::ScalarFnFactoryExt;
13use crate::scalar_fn::EmptyOptions;
14use crate::scalar_fn::fns::mask::Mask as MaskExpr;
15use crate::scalar_fn::fns::mask::MaskReduce;
16
17impl MaskReduce for Dict {
18    fn mask(array: ArrayView<'_, Dict>, mask: &ArrayRef) -> VortexResult<Option<ArrayRef>> {
19        let masked_codes = MaskExpr.try_new_array(
20            array.codes().len(),
21            EmptyOptions,
22            [array.codes().clone(), mask.clone()],
23        )?;
24        // SAFETY: masking codes doesn't change dict invariants
25        Ok(Some(unsafe {
26            DictArray::new_unchecked(masked_codes, array.values().clone()).into_array()
27        }))
28    }
29}