Struct arrow::array::BooleanBuilder

pub struct BooleanBuilder { /* fields omitted */ }

Array builder for fixed-width primitive types

Example

Create a BooleanArray from a BooleanBuilder

    use arrow::array::{Array, BooleanArray, BooleanBuilder};

    let mut b = BooleanBuilder::new(4);
    b.append_value(true);
    b.append_null();
    b.append_value(false);
    b.append_value(true);
    let arr = b.finish();

    assert_eq!(4, arr.len());
    assert_eq!(1, arr.null_count());
    assert_eq!(true, arr.value(0));
    assert!(arr.is_valid(0));
    assert!(!arr.is_null(0));
    assert!(!arr.is_valid(1));
    assert!(arr.is_null(1));
    assert_eq!(false, arr.value(2));
    assert!(arr.is_valid(2));
    assert!(!arr.is_null(2));
    assert_eq!(true, arr.value(3));
    assert!(arr.is_valid(3));
    assert!(!arr.is_null(3));

Implementations

impl BooleanBuilder

pub fn new(capacity: usize) -> Self

Creates a new primitive array builder

pub fn capacity(&self) -> usize

Returns the capacity of this builder measured in slots of type T

pub fn append_value(&mut self, v: bool) -> Result<()>

Appends a value of type T into the builder

pub fn append_null(&mut self) -> Result<()>

Appends a null slot into the builder

pub fn append_option(&mut self, v: Option<bool>) -> Result<()>

Appends an Option<T> into the builder

pub fn append_slice(&mut self, v: &[bool]) -> Result<()>

Appends a slice of type T into the builder

pub fn append_values(
    &mut self,
    values: &[bool],
    is_valid: &[bool]
) -> Result<()>

Appends values from a slice of type T and a validity boolean slice

pub fn finish(&mut self) -> BooleanArray

Builds the BooleanArray and reset this builder.

Trait Implementations

impl ArrayBuilder for BooleanBuilder

fn as_any(&self) -> &dyn Any

Returns the builder as a non-mutable Any reference.

fn as_any_mut(&mut self) -> &mut dyn Any

Returns the builder as a mutable Any reference.

fn into_box_any(self: Box<Self>) -> Box<dyn Any>

Returns the boxed builder as a box of Any.

fn len(&self) -> usize

Returns the number of array slots in the builder

fn is_empty(&self) -> bool

Returns whether the number of array slots is zero

fn finish(&mut self) -> ArrayRef

Builds the array and reset this builder.

impl Debug for BooleanBuilder

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

Formats the value using the given formatter.