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use crate::array::*;
use crate::datatypes::*;
use crate::util::test_util::seedable_rng;
use rand::Rng;
use rand::SeedableRng;
use rand::{
distributions::{Alphanumeric, Distribution, Standard},
prelude::StdRng,
};
pub fn create_primitive_array<T>(size: usize, null_density: f32) -> PrimitiveArray<T>
where
T: ArrowPrimitiveType,
Standard: Distribution<T::Native>,
{
let mut rng = seedable_rng();
(0..size)
.map(|_| {
if rng.gen::<f32>() < null_density {
None
} else {
Some(rng.gen())
}
})
.collect()
}
pub fn create_primitive_array_with_seed<T>(
size: usize,
null_density: f32,
seed: u64,
) -> PrimitiveArray<T>
where
T: ArrowPrimitiveType,
Standard: Distribution<T::Native>,
{
let mut rng = StdRng::seed_from_u64(seed);
(0..size)
.map(|_| {
if rng.gen::<f32>() < null_density {
None
} else {
Some(rng.gen())
}
})
.collect()
}
pub fn create_boolean_array(
size: usize,
null_density: f32,
true_density: f32,
) -> BooleanArray
where
Standard: Distribution<bool>,
{
let mut rng = seedable_rng();
(0..size)
.map(|_| {
if rng.gen::<f32>() < null_density {
None
} else {
let value = rng.gen::<f32>() < true_density;
Some(value)
}
})
.collect()
}
pub fn create_string_array<Offset: StringOffsetSizeTrait>(
size: usize,
null_density: f32,
) -> GenericStringArray<Offset> {
let rng = &mut seedable_rng();
(0..size)
.map(|_| {
if rng.gen::<f32>() < null_density {
None
} else {
let value = rng.sample_iter(&Alphanumeric).take(4).collect();
let value = String::from_utf8(value).unwrap();
Some(value)
}
})
.collect()
}
pub fn create_binary_array<Offset: BinaryOffsetSizeTrait>(
size: usize,
null_density: f32,
) -> GenericBinaryArray<Offset> {
let rng = &mut seedable_rng();
let range_rng = &mut seedable_rng();
(0..size)
.map(|_| {
if rng.gen::<f32>() < null_density {
None
} else {
let value = rng
.sample_iter::<u8, _>(Standard)
.take(range_rng.gen_range(0..8))
.collect::<Vec<u8>>();
Some(value)
}
})
.collect()
}
pub fn create_fsb_array(
size: usize,
null_density: f32,
value_len: usize,
) -> FixedSizeBinaryArray {
let rng = &mut seedable_rng();
FixedSizeBinaryArray::try_from_sparse_iter((0..size).map(|_| {
if rng.gen::<f32>() < null_density {
None
} else {
let value = rng
.sample_iter::<u8, _>(Standard)
.take(value_len)
.collect::<Vec<u8>>();
Some(value)
}
}))
.unwrap()
}