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use std::convert::TryFrom;
use crate::{
error::{ArrowError, Result},
ffi,
ffi::ArrowArrayRef,
};
use super::ArrayData;
impl TryFrom<ffi::ArrowArray> for ArrayData {
type Error = ArrowError;
fn try_from(value: ffi::ArrowArray) -> Result<Self> {
value.to_data()
}
}
impl TryFrom<ArrayData> for ffi::ArrowArray {
type Error = ArrowError;
fn try_from(value: ArrayData) -> Result<Self> {
unsafe { ffi::ArrowArray::try_new(value) }
}
}
#[cfg(test)]
mod tests {
use crate::error::Result;
use crate::{
array::{
Array, ArrayData, BooleanArray, Int64Array, StructArray, UInt32Array,
UInt64Array,
},
datatypes::{DataType, Field},
ffi::ArrowArray,
};
use std::convert::TryFrom;
use std::sync::Arc;
fn test_round_trip(expected: &ArrayData) -> Result<()> {
let d1 = ArrowArray::try_from(expected.clone())?;
let (array, schema) = ArrowArray::into_raw(d1);
let d1 = unsafe { ArrowArray::try_from_raw(array, schema) }?;
let result = &ArrayData::try_from(d1)?;
assert_eq!(result, expected);
Ok(())
}
#[test]
fn test_u32() -> Result<()> {
let array = UInt32Array::from(vec![Some(2), None, Some(1), None]);
let data = array.data();
test_round_trip(data)
}
#[test]
fn test_u64() -> Result<()> {
let array = UInt64Array::from(vec![Some(2), None, Some(1), None]);
let data = array.data();
test_round_trip(data)
}
#[test]
fn test_i64() -> Result<()> {
let array = Int64Array::from(vec![Some(2), None, Some(1), None]);
let data = array.data();
test_round_trip(data)
}
#[test]
fn test_struct() -> Result<()> {
let inner = StructArray::from(vec![
(
Field::new("a1", DataType::Boolean, false),
Arc::new(BooleanArray::from(vec![true, true, false, false]))
as Arc<dyn Array>,
),
(
Field::new("a2", DataType::UInt32, false),
Arc::new(UInt32Array::from(vec![1, 2, 3, 4])),
),
]);
let array = StructArray::from(vec![
(
Field::new("a", inner.data_type().clone(), false),
Arc::new(inner) as Arc<dyn Array>,
),
(
Field::new("b", DataType::Boolean, false),
Arc::new(BooleanArray::from(vec![false, false, true, true]))
as Arc<dyn Array>,
),
(
Field::new("c", DataType::UInt32, false),
Arc::new(UInt32Array::from(vec![42, 28, 19, 31])),
),
]);
let data = array.data();
test_round_trip(data)
}
}