Struct MapItem 

pub struct MapItem<'a> { /* private fields */ }

A pre-resolved view into a single row’s map of string keys to string values. Like ListItem, the string array types are resolved once at construction.

Note: in conjunction with the allow_null_container_values attribute, materialize drops any (key, value) pairs where the underlying value was null. If preserving null values is important, use the allow_null_container_values attribute and manually materialize the map using MapItem::get.

Implementations

impl<'a> MapItem<'a>

pub fn new( keys: &'a dyn StringArrayAccessor, values: &'a dyn StringArrayAccessor, offsets: Range<usize>, ) -> MapItem<'a>

pub fn get(&self, key: &str) -> Option<&'a str>

pub fn materialize(&self) -> HashMap<String, String>

Trait Implementations

impl<'a> TypedGetData<'a, MapItem<'a>> for dyn GetData<'a> + '_

fn get_opt( &'a self, row_index: usize, field_name: &str, ) -> DeltaResult<Option<MapItem<'a>>>

fn get(&'a self, row_index: usize, field_name: &str) -> DeltaResult<T>