Struct Utf8ArrayBuilder

pub struct Utf8ArrayBuilder {
    bytes: BytesArrayBuilder,
}

Utf8ArrayBuilder use &str to build an Utf8Array.

Fields

bytes: BytesArrayBuilder

Implementations

impl Utf8ArrayBuilder

pub fn writer(&mut self) -> StringWriter<'_>

pub fn append_display(&mut self, value: Option<impl Display>)

Append an element as the Display format to the array.

Trait Implementations

impl ArrayBuilder for Utf8ArrayBuilder

fn new(item_capacity: usize) -> Self

Creates a new Utf8ArrayBuilder.

item_capacity is the number of items to pre-allocate. The size of the preallocated buffer of offsets is the number of items plus one. No additional memory is pre-allocated for the data buffer.

type ArrayType = Utf8Array

Corresponding Array of this builder, which is reciprocal to ArrayBuilder.

fn with_type(item_capacity: usize, ty: DataType) -> Self

Panics

fn append_n<'a>(&'a mut self, n: usize, value: Option<&'a str>)

Append a value multiple times.

fn append_array(&mut self, other: &Utf8Array)

Append an array to builder.

fn pop(&mut self) -> Option<()>

Pop an element from the builder.

fn len(&self) -> usize

Return the number of elements in the builder.

fn finish(self) -> Utf8Array

Finish build and return a new array.

fn append(&mut self, value: Option<<Self::ArrayType as Array>::RefItem<'_>>)

Append a value to builder.

fn append_owned(&mut self, value: Option<<Self::ArrayType as Array>::OwnedItem>)

Append an owned value to builder.

fn append_null(&mut self)

fn append_array_element(&mut self, other: &Self::ArrayType, idx: usize)

Append an element in another array into builder.

fn is_empty(&self) -> bool

Return true if the array has a length of 0.

impl Clone for Utf8ArrayBuilder

fn clone(&self) -> Utf8ArrayBuilder

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Utf8ArrayBuilder

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

Formats the value using the given formatter.

impl EstimateSize for Utf8ArrayBuilder

fn estimated_heap_size(&self) -> usize

The estimated heap size of the current struct in bytes.

fn estimated_size(&self) -> usize

where Self: Sized,

The estimated total size of the current struct in bytes, including the estimated_heap_size and the size of Self.

impl From<Utf8ArrayBuilder> for ArrayBuilderImpl

fn from(builder: Utf8ArrayBuilder) -> Self

Converts to this type from the input type.