Struct arrow_array::array::FixedSizeBinaryArray

pub struct FixedSizeBinaryArray { /* private fields */ }

An array where each element is a fixed-size sequence of bytes.

Examples

Create an array from an iterable argument of byte slices.

   use arrow_array::{Array, FixedSizeBinaryArray};
   let input_arg = vec![ vec![1, 2], vec![3, 4], vec![5, 6] ];
   let arr = FixedSizeBinaryArray::try_from_iter(input_arg.into_iter()).unwrap();

   assert_eq!(3, arr.len());

Create an array from an iterable argument of sparse byte slices. Sparsity means that the input argument can contain None items.

   use arrow_array::{Array, FixedSizeBinaryArray};
   let input_arg = vec![ None, Some(vec![7, 8]), Some(vec![9, 10]), None, Some(vec![13, 14]) ];
   let arr = FixedSizeBinaryArray::try_from_sparse_iter(input_arg.into_iter()).unwrap();
   assert_eq!(5, arr.len())

Implementations

impl FixedSizeBinaryArray

pub fn value(&self, i: usize) -> &[u8]

Returns the element at index i as a byte slice.

Panics

Panics if index i is out of bounds.

pub unsafe fn value_unchecked(&self, i: usize) -> &[u8]

Returns the element at index i as a byte slice.

Safety

Caller is responsible for ensuring that the index is within the bounds of the array

pub fn value_offset(&self, i: usize) -> i32

Returns the offset for the element at index i.

Note this doesn’t do any bound checking, for performance reason.

pub fn value_length(&self) -> i32

Returns the length for an element.

All elements have the same length as the array is a fixed size.

pub fn value_data(&self) -> Buffer

Returns a clone of the value data buffer

pub fn try_from_sparse_iter<T, U>(iter: T) -> Result<Self, ArrowError>where
    T: Iterator<Item = Option<U>>,
    U: AsRef<[u8]>,

👎Deprecated: This function will fail if the iterator produces only None values; prefer try_from_sparse_iter_with_size

Create an array from an iterable argument of sparse byte slices. Sparsity means that items returned by the iterator are optional, i.e input argument can contain None items.

Examples

use arrow_array::FixedSizeBinaryArray;
let input_arg = vec![
    None,
    Some(vec![7, 8]),
    Some(vec![9, 10]),
    None,
    Some(vec![13, 14]),
    None,
];
let array = FixedSizeBinaryArray::try_from_sparse_iter(input_arg.into_iter()).unwrap();

Errors

Returns error if argument has length zero, or sizes of nested slices don’t match.

pub fn try_from_sparse_iter_with_size<T, U>(
    iter: T,
    size: i32
) -> Result<Self, ArrowError>where
    T: Iterator<Item = Option<U>>,
    U: AsRef<[u8]>,

Create an array from an iterable argument of sparse byte slices. Sparsity means that items returned by the iterator are optional, i.e input argument can contain None items. In cases where the iterator returns only None values, this also takes a size parameter to ensure that the a valid FixedSizeBinaryArray is still created.

Examples

use arrow_array::FixedSizeBinaryArray;
let input_arg = vec![
    None,
    Some(vec![7, 8]),
    Some(vec![9, 10]),
    None,
    Some(vec![13, 14]),
    None,
];
let array = FixedSizeBinaryArray::try_from_sparse_iter_with_size(input_arg.into_iter(), 2).unwrap();

Errors

Returns error if argument has length zero, or sizes of nested slices don’t match.

pub fn try_from_iter<T, U>(iter: T) -> Result<Self, ArrowError>where
    T: Iterator<Item = U>,
    U: AsRef<[u8]>,

Create an array from an iterable argument of byte slices.

Examples

use arrow_array::FixedSizeBinaryArray;
let input_arg = vec![
    vec![1, 2],
    vec![3, 4],
    vec![5, 6],
];
let array = FixedSizeBinaryArray::try_from_iter(input_arg.into_iter()).unwrap();

Errors

Returns error if argument has length zero, or sizes of nested slices don’t match.

pub fn iter(&self) -> FixedSizeBinaryIter<'_>

constructs a new iterator

Trait Implementations

impl Array for FixedSizeBinaryArray

fn as_any(&self) -> &dyn Any

Returns the array as Any so that it can be downcasted to a specific implementation.

fn data(&self) -> &ArrayData

Returns a reference to the underlying data of this array.

fn into_data(self) -> ArrayData

Returns the underlying data of this array.

fn data_ref(&self) -> &ArrayData

Returns a reference-counted pointer to the underlying data of this array.

fn data_type(&self) -> &DataType

Returns a reference to the DataType of this array.

fn slice(&self, offset: usize, length: usize) -> ArrayRef

Returns a zero-copy slice of this array with the indicated offset and length.

fn len(&self) -> usize

Returns the length (i.e., number of elements) of this array.

fn is_empty(&self) -> bool

Returns whether this array is empty.

fn offset(&self) -> usize

Returns the offset into the underlying data used by this array(-slice). Note that the underlying data can be shared by many arrays. This defaults to 0.

fn is_null(&self, index: usize) -> bool

Returns whether the element at index is null. When using this function on a slice, the index is relative to the slice.

fn is_valid(&self, index: usize) -> bool

Returns whether the element at index is not null. When using this function on a slice, the index is relative to the slice.

fn null_count(&self) -> usize

Returns the total number of null values in this array.

fn get_buffer_memory_size(&self) -> usize

Returns the total number of bytes of memory pointed to by this array. The buffers store bytes in the Arrow memory format, and include the data as well as the validity map.

fn get_array_memory_size(&self) -> usize

Returns the total number of bytes of memory occupied physically by this array. This value will always be greater than returned by get_buffer_memory_size() and includes the overhead of the data structures that contain the pointers to the various buffers.

impl<'a> ArrayAccessor for &'a FixedSizeBinaryArray

type Item = &'a [u8]

The Arrow type of the element being accessed.

fn value(&self, index: usize) -> Self::Item

Returns the element at index i

unsafe fn value_unchecked(&self, index: usize) -> Self::Item

Returns the element at index i

impl Clone for FixedSizeBinaryArray

fn clone(&self) -> FixedSizeBinaryArray

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FixedSizeBinaryArray

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<ArrayData> for FixedSizeBinaryArray

fn from(data: ArrayData) -> Self

Converts to this type from the input type.

impl From<FixedSizeBinaryArray> for ArrayData

fn from(array: FixedSizeBinaryArray) -> Self

Converts to this type from the input type.

impl From<FixedSizeListArray> for FixedSizeBinaryArray

Creates a FixedSizeBinaryArray from FixedSizeList<u8> array

fn from(v: FixedSizeListArray) -> Self

Converts to this type from the input type.

impl From<Vec<&[u8], Global>> for FixedSizeBinaryArray

fn from(v: Vec<&[u8]>) -> Self

Converts to this type from the input type.

impl From<Vec<Option<&[u8]>, Global>> for FixedSizeBinaryArray

fn from(v: Vec<Option<&[u8]>>) -> Self

Converts to this type from the input type.

impl<'a> IntoIterator for &'a FixedSizeBinaryArray

type Item = Option<&'a [u8]>

The type of the elements being iterated over.

type IntoIter = ArrayIter<&'a FixedSizeBinaryArray>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq<FixedSizeBinaryArray> for FixedSizeBinaryArray

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.