fn map()

in crates/iceberg/src/spec/schema/prune_columns.rs [196:230]

• 35 lines of code
• 7 McCabe index (conditional complexity)

    fn map(
        &mut self,
        map: &MapType,
        _key_value: Option<Type>,
        value: Option<Type>,
    ) -> Result<Option<Type>> {
        if self.selected.contains(&map.value_field.id) {
            if self.select_full_types {
                Ok(Some(Type::Map(map.clone())))
            } else if map.value_field.field_type.is_struct() {
                let projected_struct =
                    PruneColumn::project_selected_struct(Some(value.unwrap())).unwrap();
                return Ok(Some(Type::Map(PruneColumn::project_map(
                    map,
                    Type::Struct(projected_struct),
                )?)));
            } else if map.value_field.field_type.is_primitive() {
                return Ok(Some(Type::Map(map.clone())));
            } else {
                return Err(Error::new(
                        ErrorKind::DataInvalid,
                        format!("Cannot explicitly project List or Map types, Map value {} of type {} was selected", map.value_field.id, map.value_field.field_type),
                    ));
            }
        } else if let Some(value_result) = value {
            return Ok(Some(Type::Map(PruneColumn::project_map(
                map,
                value_result,
            )?)));
        } else if self.selected.contains(&map.key_field.id) {
            Ok(Some(Type::Map(map.clone())))
        } else {
            Ok(None)
        }
    }