Struct DictionaryBuilder 

pub struct DictionaryBuilder { /* private fields */ }

Builder for creating dictionary encodings.

Implementations

impl DictionaryBuilder

pub fn new() -> Self

Creates a new dictionary builder.

pub fn with_capacity(value_capacity: usize, dictionary_capacity: usize) -> Self

Creates a new dictionary builder with estimated capacity.

pub fn add(&mut self, value: &str) -> u32

Adds a string value to the encoding.

Returns the code assigned to this value.

pub fn add_null(&mut self)

Adds a null value.

pub fn add_optional(&mut self, value: Option<&str>) -> Option<u32>

Adds an optional value.

pub fn len(&self) -> usize

Returns the current number of values.

pub fn is_empty(&self) -> bool

Returns whether the builder is empty.

pub fn dictionary_size(&self) -> usize

Returns the current dictionary size.

pub fn build(self) -> DictionaryEncoding

Builds the dictionary encoding.

pub fn clear(&mut self)

Clears the builder for reuse.

Trait Implementations

impl Debug for DictionaryBuilder

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

Formats the value using the given formatter.

impl Default for DictionaryBuilder

fn default() -> Self

Returns the “default value” for a type.