Struct arrow::array::GenericBinaryBuilder

pub struct GenericBinaryBuilder<OffsetSize>where
    OffsetSize: OffsetSizeTrait,{ /* private fields */ }

Array builder for GenericBinaryArray

Implementations

impl<OffsetSize> GenericBinaryBuilder<OffsetSize>where
    OffsetSize: OffsetSizeTrait,

pub fn new() -> GenericBinaryBuilder<OffsetSize>

Creates a new GenericBinaryBuilder.

pub fn with_capacity(
    item_capacity: usize,
    data_capacity: usize
) -> GenericBinaryBuilder<OffsetSize>

Creates a new GenericBinaryBuilder.

• 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.
• data_capacity is the total number of bytes of string data to pre-allocate (for all items, not per item).

pub fn append_value(&mut self, value: impl AsRef<[u8]>)

Appends a byte slice into the builder.

pub fn append_null(&mut self)

Append a null value into the builder.

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

Builds the GenericBinaryArray and reset this builder.

pub fn values_slice(&self) -> &[u8]

Returns the current values buffer as a slice

pub fn offsets_slice(&self) -> &[OffsetSize]

Returns the current offsets buffer as a slice

Trait Implementations

impl<OffsetSize> ArrayBuilder for GenericBinaryBuilder<OffsetSize>where
    OffsetSize: OffsetSizeTrait,

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<GenericBinaryBuilder<OffsetSize>, Global>
) -> Box<dyn Any + 'static, Global>

Returns the boxed builder as a box of Any.

fn len(&self) -> usize

Returns the number of binary slots in the builder

fn is_empty(&self) -> bool

Returns whether the number of binary slots is zero

fn finish(&mut self) -> Arc<dyn Array + 'static>

Builds the array and reset this builder.

impl<OffsetSize> Debug for GenericBinaryBuilder<OffsetSize>where
    OffsetSize: Debug + OffsetSizeTrait,

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

Formats the value using the given formatter.

impl<OffsetSize> Default for GenericBinaryBuilder<OffsetSize>where
    OffsetSize: OffsetSizeTrait,

fn default() -> GenericBinaryBuilder<OffsetSize>

Returns the “default value” for a type.