Module custom 

Custom data: registration and dynamic decoding.

• Registration: Call ensure_custom_data_registered::<T>() once (e.g. before using the catalog) for each custom data type T produced by the #[custom_data] macro. For Python bindings, also call [nautilus_model::data::register_rust_extractor::<T>()].
• Decoder: CustomDataDecoder provides ArrowSchemaProvider and DecodeDataFromRecordBatch for Parquet-backed custom data decoded at runtime by type name. Types must be registered via ensure_custom_data_registered::<T>() before use.

Structs

CustomDataDecoder

Decoder for custom data types that are identified at runtime by metadata (e.g. type_name).

Traits

CustomDataSerialize

Trait for custom data types that support Arrow schema and record batch encoding. Used as a type bound by the #[custom_data] macro; catalog encoding goes through the registry, not this trait directly.

Functions

ensure_custom_data_registered

Registers a custom data type in the JSON and Arrow registries. Call once per type (e.g. at catalog decode or before querying custom data).