结构体 Maker 

struct Maker<'a> {
    resolver: Resolver<'a>,
    use_utf8view: bool,
    strict_mode: bool,
}

将 Avro 类型名称解析为 AvroDataType

参阅 https://avro.apache.org/docs/1.11.1/specification/#names

字段

resolver: Resolver<'a>

use_utf8view: bool

strict_mode: bool

实现

impl<'a> Maker<'a>

fn new(use_utf8view: bool, strict_mode: bool) -> Self

fn propagate_nullability_into_ree(dt: &mut AvroDataType, nb: Nullability)

fn make_data_type<'s>( &mut self, writer_schema: &'s Schema<'a>, reader_schema: Option<&'s Schema<'a>>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn parse_type<'s>( &mut self, schema: &'s Schema<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

从提供的 Schema 和给定的 name 及 namespace 解析 AvroDataType

name: 用于在其父 namespace 中引用 schema 的名称：作为类型层次结构一部分的可选限定符。如果数据类型是字符串，则在请求时转换为使用 Utf8View

此函数在模式转换过程中用于确定字符串数据应表示为 StringArray（默认）还是 StringViewArray。

use_utf8view: 如果为 true，则字符串类型使用 Utf8View 而不是 Utf8

有关更多信息，请参阅 Resolver

fn resolve_type<'s>( &mut self, writer_schema: &'s Schema<'a>, reader_schema: &'s Schema<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn coercion_from(dt: &AvroDataType) -> Promotion

fn find_best_promotion( &mut self, writer: &Schema<'a>, reader_variants: &[Schema<'a>], namespace: Option<&'a str>, ) -> Option<(usize, Promotion)>

fn resolve_unions<'s>( &mut self, writer_variants: &'s [Schema<'a>], reader_variants: &'s [Schema<'a>], namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn resolve_array( &mut self, writer_array: &Array<'a>, reader_array: &Array<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn resolve_map( &mut self, writer_map: &Map<'a>, reader_map: &Map<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn resolve_fixed<'s>( &mut self, writer_fixed: &Fixed<'a>, reader_fixed: &Fixed<'a>, reader_schema: &'s Schema<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn resolve_primitives( &mut self, write_primitive: PrimitiveType, read_primitive: PrimitiveType, reader_schema: &Schema<'a>, ) -> Result<AvroDataType, ArrowError>

fn resolve_enums( &mut self, writer_enum: &Enum<'a>, reader_enum: &Enum<'a>, reader_schema: &Schema<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>

fn build_writer_lookup( writer_record: &Record<'a>, ) -> (HashMap<&'a str, usize>, HashSet<&'a str>)

fn resolve_records( &mut self, writer_record: &Record<'a>, reader_record: &Record<'a>, namespace: Option<&'a str>, ) -> Result<AvroDataType, ArrowError>