Struct VariantValueArrayBuilderExt 

pub struct VariantValueArrayBuilderExt<'a> {
    metadata_builder: ReadOnlyMetadataBuilder<'a>,
    value_builder: &'a mut VariantValueArrayBuilder,
}

A thin [VariantBuilderExt] wrapper that hides the short-lived (per-row) [ReadOnlyMetadataBuilder] instances that VariantValueArrayBuilder requires.

Fields

metadata_builder: ReadOnlyMetadataBuilder<'a>

value_builder: &'a mut VariantValueArrayBuilder

Implementations

impl<'a> VariantValueArrayBuilderExt<'a>

pub fn new( metadata_builder: ReadOnlyMetadataBuilder<'a>, value_builder: &'a mut VariantValueArrayBuilder, ) -> Self

Creates a new instance from a metadata builder and a reference to a variant value builder.

Trait Implementations

impl<'a> VariantBuilderExt for VariantValueArrayBuilderExt<'a>

type State<'b> = ValueArrayBuilderState<'b> where Self: 'b

The builder specific state used by nested builders

fn append_null(&mut self)

Appends a NULL value to this builder. The semantics depend on the implementation, but will often translate to appending a [Variant::Null] value.

fn append_value<'m, 'v>(&mut self, value: impl Into<Variant<'m, 'v>>)

Appends a new variant value to this builder. See e.g. [VariantBuilder::append_value].

fn try_new_list( &mut self, ) -> Result<ListBuilder<'_, Self::State<'_>>, ArrowError>

Creates a nested list builder. See e.g. [VariantBuilder::new_list]. Returns an error if the nested builder cannot be created, see e.g. [ObjectBuilder::try_new_list].

fn try_new_object( &mut self, ) -> Result<ObjectBuilder<'_, Self::State<'_>>, ArrowError>

Creates a nested object builder. See e.g. [VariantBuilder::new_object]. Returns an error if the nested builder cannot be created, see e.g. [ObjectBuilder::try_new_object].

fn new_list(&mut self) -> ListBuilder<'_, Self::State<'_>>

Creates a nested list builder. See e.g. [VariantBuilder::new_list]. Panics if the nested builder cannot be created, see e.g. [ObjectBuilder::new_list].

fn new_object(&mut self) -> ObjectBuilder<'_, Self::State<'_>>

Creates a nested object builder. See e.g. [VariantBuilder::new_object]. Panics if the nested builder cannot be created, see e.g. [ObjectBuilder::new_object].