Struct re_components::FixedSizeArrayField

pub struct FixedSizeArrayField<T, const SIZE: usize>(_);

arrow2_convert helper for fields of type [T; SIZE]

This allows us to use fields of type [T; SIZE] in arrow2_convert. Since this is a helper, it must be specified as the type of the field using the #[arrow_field(type = "FixedSizeArrayField<T,SIZE>")] attribute.

Example:

use arrow2_convert::{ArrowField, ArrowSerialize, ArrowDeserialize};
use re_components::FixedSizeArrayField;

#[derive(ArrowField, ArrowSerialize, ArrowDeserialize)]
pub struct ConvertibleType {
    #[arrow_field(type = "FixedSizeArrayField<u32,2>")]
    data: [u32; 2],
}

Trait Implementations

impl<T, const SIZE: usize> ArrowDeserialize for FixedSizeArrayField<T, SIZE>where T: NativeType + ArrowDeserialize + ArrowEnableVecForType + ArrowField<Type = T> + 'static, <T as ArrowDeserialize>::ArrayType: 'static, for<'b> &'b <T as ArrowDeserialize>::ArrayType: IntoIterator,

type ArrayType = FastFixedSizeListArray<T, SIZE>

The arrow2::Array type corresponding to this field

fn arrow_deserialize( v: <&Self::ArrayType as IntoIterator>::Item ) -> Option<<Self as ArrowField>::Type>

Deserialize this field from arrow

impl<T, const SIZE: usize> ArrowField for FixedSizeArrayField<T, SIZE>where T: ArrowField + ArrowEnableVecForType,

type Type = [T; SIZE]

This should be Self except when implementing large offset and fixed placeholder types. For the later, it should refer to the actual type. For example when the placeholder type is LargeString, this should be String.

fn data_type() -> DataType

The DataType

impl<T, const SIZE: usize> ArrowSerialize for FixedSizeArrayField<T, SIZE>where T: ArrowSerialize + ArrowEnableVecForType + ArrowField<Type = T> + 'static, <T as ArrowSerialize>::MutableArrayType: Default,

type MutableArrayType = MutableFixedSizeListArray<<T as ArrowSerialize>::MutableArrayType>

The arrow2::array::MutableArray that holds this value

fn new_array() -> Self::MutableArrayType

Create a new mutable array

fn arrow_serialize( v: &<Self as ArrowField>::Type, array: &mut Self::MutableArrayType ) -> Result<()>

Serialize this field to arrow