Struct MetadataSchemaBuilder 

pub struct MetadataSchemaBuilder { /* private fields */ }

Builder for MetadataSchema.

Implementations

impl MetadataSchemaBuilder

pub fn required(self, key: &str, data_type: DataType) -> Self

Adds a required field definition.

pub fn optional(self, key: &str, data_type: DataType) -> Self

Adds an optional field definition.

pub fn unknown_field_policy(self, policy: UnknownFieldPolicy) -> Self

Sets the policy for metadata keys not declared by the schema.

pub fn build(self) -> MetadataSchema

Builds the schema.

Trait Implementations

impl Clone for MetadataSchemaBuilder

fn clone(&self) -> MetadataSchemaBuilder

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MetadataSchemaBuilder

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

Formats the value using the given formatter.

impl Default for MetadataSchemaBuilder

fn default() -> MetadataSchemaBuilder

Returns the “default value” for a type.

impl PartialEq for MetadataSchemaBuilder

fn eq(&self, other: &MetadataSchemaBuilder) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for MetadataSchemaBuilder

impl StructuralPartialEq for MetadataSchemaBuilder