[−][src]Struct arrow::array::BufferBuilder
Builder for creating a Buffer
object.
This builder is implemented for primitive types and creates a
buffer with a zero-copy build()
method.
See trait BufferBuilderTrait
for further documentation and examples.
A Buffer
is the underlying data
structure of Arrow's Arrays
.
For all supported types, there are type definitions for the
generic version of BufferBuilder<T>
, e.g. UInt8BufferBuilder
.
Example:
use arrow::array::{UInt8BufferBuilder, BufferBuilderTrait}; let mut builder = UInt8BufferBuilder::new(100); builder.append_slice(&[42, 43, 44]); builder.append(45); let buffer = builder.finish(); assert_eq!(unsafe { buffer.typed_data::<u8>() }, &[42, 43, 44, 45]);
Trait Implementations
impl BufferBuilderTrait<BooleanType> for BufferBuilder<BooleanType>
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fn new(capacity: usize) -> Self
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fn advance(&mut self, i: usize) -> Result<()>
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fn append(&mut self, v: bool) -> Result<()>
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fn append_n(&mut self, n: usize, v: bool) -> Result<()>
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fn append_slice(&mut self, slice: &[bool]) -> Result<()>
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fn reserve(&mut self, n: usize) -> Result<()>
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fn finish(&mut self) -> Buffer
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fn len(&self) -> usize
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fn is_empty(&self) -> bool
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fn capacity(&self) -> usize
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impl<T: ArrowPrimitiveType> BufferBuilderTrait<T> for BufferBuilder<T>
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default fn new(capacity: usize) -> Self
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fn len(&self) -> usize
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fn is_empty(&self) -> bool
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fn capacity(&self) -> usize
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default fn advance(&mut self, i: usize) -> Result<()>
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default fn reserve(&mut self, n: usize) -> Result<()>
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default fn append(&mut self, v: T::Native) -> Result<()>
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default fn append_n(&mut self, n: usize, v: T::Native) -> Result<()>
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default fn append_slice(&mut self, slice: &[T::Native]) -> Result<()>
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default fn finish(&mut self) -> Buffer
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impl<T: Debug + ArrowPrimitiveType> Debug for BufferBuilder<T>
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Auto Trait Implementations
impl<T> RefUnwindSafe for BufferBuilder<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for BufferBuilder<T> where
T: Send,
T: Send,
impl<T> Sync for BufferBuilder<T> where
T: Sync,
T: Sync,
impl<T> Unpin for BufferBuilder<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for BufferBuilder<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,