Struct VariantArrayVariantBuilder 

pub struct VariantArrayVariantBuilder<'a> {
    parent_state: ParentState<'a>,
    metadata_offsets: &'a mut Vec<usize>,
    value_offsets: &'a mut Vec<usize>,
    nulls: &'a mut NullBufferBuilder,
}

A VariantBuilderExt that writes directly to the buffers of a VariantArrayBuilder.

If Self::finish is not called, any changes will be rolled back

See VariantArrayBuilder::variant_builder for an example

Fields

parent_state: ParentState<'a>

metadata_offsets: &'a mut Vec<usize>

value_offsets: &'a mut Vec<usize>

nulls: &'a mut NullBufferBuilder

Implementations

impl<'a> VariantArrayVariantBuilder<'a>

fn new(builder: &'a mut VariantArrayBuilder) -> Self

Constructs a new VariantArrayVariantBuilder

Note this is not public as this is a structure that is logically part of the VariantArrayBuilder and relies on its internal structure

pub fn finish(self)

Called to finish the in progress variant and write it to the underlying buffers

Note if you do not call finish, on drop any changes made to the underlying buffers will be rolled back.

fn parent_state(&mut self) -> ParentState<'_>

Trait Implementations

impl Drop for VariantArrayVariantBuilder<'_>

fn drop(&mut self)

Executes the destructor for this type.

impl VariantBuilderExt for VariantArrayVariantBuilder<'_>

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<'_>, 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<'_>, 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<'_>

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<'_>

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].