Struct arrow::array::FixedSizeListBuilder

pub struct FixedSizeListBuilder<T: ArrayBuilder> { /* fields omitted */ }

Array builder for ListArray

Implementations

impl<T: ArrayBuilder> FixedSizeListBuilder<T>

pub fn new(values_builder: T, length: i32) -> Self

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

pub fn with_capacity(values_builder: T, length: i32, capacity: usize) -> Self

Creates a new FixedSizeListBuilder from a given values array builder 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: ArrayBuilder> FixedSizeListBuilder<T> where
    T: '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) -> Result<()>

Finish the current variable-length list array slot

pub fn finish(&mut self) -> FixedSizeListArray

Builds the FixedSizeListBuilder and reset this builder.

Trait Implementations

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

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<T: Debug + ArrayBuilder> Debug for FixedSizeListBuilder<T>

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

Formats the value using the given formatter.