polars_arrow/array/growable/
boolean.rs

1use std::sync::Arc;
2
3use super::Growable;
4use crate::array::growable::utils::{extend_validity, prepare_validity};
5use crate::array::{Array, BooleanArray};
6use crate::bitmap::BitmapBuilder;
7use crate::datatypes::ArrowDataType;
8
9/// Concrete [`Growable`] for the [`BooleanArray`].
10pub struct GrowableBoolean<'a> {
11    arrays: Vec<&'a BooleanArray>,
12    dtype: ArrowDataType,
13    validity: Option<BitmapBuilder>,
14    values: BitmapBuilder,
15}
16
17impl<'a> GrowableBoolean<'a> {
18    /// Creates a new [`GrowableBoolean`] bound to `arrays` with a pre-allocated `capacity`.
19    /// # Panics
20    /// If `arrays` is empty.
21    pub fn new(arrays: Vec<&'a BooleanArray>, mut use_validity: bool, capacity: usize) -> Self {
22        let dtype = arrays[0].dtype().clone();
23
24        // if any of the arrays has nulls, insertions from any array requires setting bits
25        // as there is at least one array with nulls.
26        if !use_validity & arrays.iter().any(|array| array.null_count() > 0) {
27            use_validity = true;
28        };
29
30        Self {
31            arrays,
32            dtype,
33            values: BitmapBuilder::with_capacity(capacity),
34            validity: prepare_validity(use_validity, capacity),
35        }
36    }
37
38    fn to(&mut self) -> BooleanArray {
39        let validity = self.validity.take();
40        let values = std::mem::take(&mut self.values);
41
42        BooleanArray::new(
43            self.dtype.clone(),
44            values.freeze(),
45            validity.map(|v| v.freeze()),
46        )
47    }
48}
49
50impl<'a> Growable<'a> for GrowableBoolean<'a> {
51    unsafe fn extend(&mut self, index: usize, start: usize, len: usize) {
52        let array = *self.arrays.get_unchecked(index);
53        extend_validity(&mut self.validity, array, start, len);
54
55        let values = array.values();
56
57        let (slice, offset, _) = values.as_slice();
58        self.values.extend_from_slice(slice, start + offset, len);
59    }
60
61    fn extend_validity(&mut self, additional: usize) {
62        self.values.extend_constant(additional, false);
63        if let Some(validity) = &mut self.validity {
64            validity.extend_constant(additional, false);
65        }
66    }
67
68    #[inline]
69    fn len(&self) -> usize {
70        self.values.len()
71    }
72
73    fn as_arc(&mut self) -> Arc<dyn Array> {
74        Arc::new(self.to())
75    }
76
77    fn as_box(&mut self) -> Box<dyn Array> {
78        Box::new(self.to())
79    }
80}
81
82impl<'a> From<GrowableBoolean<'a>> for BooleanArray {
83    fn from(val: GrowableBoolean<'a>) -> Self {
84        BooleanArray::new(
85            val.dtype,
86            val.values.freeze(),
87            val.validity.map(|v| v.freeze()),
88        )
89    }
90}
polars_arrow/array/growable/boolean.rs

polars_arrow/array/growable/
boolean.rs
