Trait arrow::builder::ArrayBuilder

pub trait ArrayBuilder {
    type ArrayType: Array;
    fn into_any(self) -> Box<dyn Any>;
    fn len(&self) -> usize;
    fn finish(self) -> Self::ArrayType;
}

Trait for dealing with different array builders at runtime

Associated Types

type ArrayType: Array

The type of array that this builder creates

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Required methods

fn into_any(self) -> Box<dyn Any>

Returns the builder as an owned Any type so that it can be downcast to a specific implementation before calling it's finish method

fn len(&self) -> usize

Returns the number of array slots in the builder

fn finish(self) -> Self::ArrayType

Builds the array

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Implementors

impl ArrayBuilder for BinaryArrayBuilder

type ArrayType = BinaryArray

fn into_any(self) -> Box<dyn Any>

Returns the builder as an owned Any type so that it can be downcast to a specific implementation before calling it's finish method.

fn len(&self) -> usize

Returns the number of array slots in the builder

fn finish(self) -> BinaryArray

Builds the BinaryArray

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

type ArrayType = ListArray

fn into_any(self) -> Box<dyn Any>

Returns the builder as an owned Any type so that it can be downcast to a specific implementation before calling it's finish method.

fn len(&self) -> usize

Returns the number of array slots in the builder

fn finish(self) -> ListArray

Builds the ListArray

impl<T: ArrowPrimitiveType> ArrayBuilder for PrimitiveArrayBuilder<T>

type ArrayType = PrimitiveArray<T>

fn into_any(self) -> Box<dyn Any>

Returns the builder as an owned Any type so that it can be downcast to a specific implementation before calling it's finish method

fn len(&self) -> usize

Returns the number of array slots in the builder

fn finish(self) -> PrimitiveArray<T>

Builds the PrimitiveArray

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