Struct arrow::array::FixedSizeListBuilder

pub struct FixedSizeListBuilder<T>where
    T: ArrayBuilder,{ /* private fields */ }

Array builder for FixedSizeListArray

Implementations

impl<T> FixedSizeListBuilder<T>where
    T: ArrayBuilder,

pub fn new(values_builder: T, value_length: i32) -> FixedSizeListBuilder<T>

Creates a new FixedSizeListBuilder from a given values array builder value_length is the number of values within each array

pub fn with_capacity(
    values_builder: T,
    value_length: i32,
    capacity: usize
) -> FixedSizeListBuilder<T>

Creates a new FixedSizeListBuilder from a given values array builder value_length is the number of values within each array capacity is the number of items to pre-allocate space for in this builder

impl<T> FixedSizeListBuilder<T>where
    T: ArrayBuilder + 'static,

pub fn values(&mut self) -> &mut T

Returns the child array builder as a mutable reference.

This mutable reference can be used to append values into the child array builder, but you must call append to delimit each distinct list value.

pub fn value_length(&self) -> i32

pub fn append(&mut self, is_valid: bool)

Finish the current fixed-length list array slot

pub fn finish(&mut self) -> FixedSizeListArray

Builds the FixedSizeListBuilder and reset this builder.

Trait Implementations

impl<T> ArrayBuilder for FixedSizeListBuilder<T>where
    T: ArrayBuilder + 'static,

fn as_any(&self) -> &(dyn Any + 'static)

Returns the builder as a non-mutable Any reference.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the builder as a mutable Any reference.

fn into_box_any(
    self: Box<FixedSizeListBuilder<T>, Global>
) -> Box<dyn Any + 'static, Global>

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) -> Arc<dyn Array + 'static>

Builds the array and reset this builder.

impl<T> Debug for FixedSizeListBuilder<T>where
    T: Debug + ArrayBuilder,

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

Formats the value using the given formatter.