Struct arrow::array::GenericStringBuilder

pub struct GenericStringBuilder<OffsetSize: OffsetSizeTrait> { /* fields omitted */ }

Implementations

impl<OffsetSize: StringOffsetSizeTrait> GenericStringBuilder<OffsetSize>

pub fn new(capacity: usize) -> Self

Creates a new StringBuilder, capacity is the number of bytes of string data to pre-allocate space for in this builder

pub fn with_capacity(item_capacity: usize, data_capacity: usize) -> Self

Creates a new StringBuilder, data_capacity is the number of bytes of string data to pre-allocate space for in this builder item_capacity is the number of items to pre-allocate space for in this builder

pub fn append_value(&mut self, value: impl AsRef<str>) -> Result<()>

Appends a string into the builder.

Automatically calls the append method to delimit the string appended in as a distinct array element.

pub fn append(&mut self, is_valid: bool) -> Result<()>

Finish the current variable-length list array slot.

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

Append a null value to the array.

pub fn finish(&mut self) -> GenericStringArray<OffsetSize>

Builds the StringArray and reset this builder.

Trait Implementations

impl<OffsetSize: StringOffsetSizeTrait> ArrayBuilder for GenericStringBuilder<OffsetSize>

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<OffsetSize: Debug + OffsetSizeTrait> Debug for GenericStringBuilder<OffsetSize>

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

Formats the value using the given formatter.