Module arrow 

Apache Arrow bridge for crate::SpectrumRecord.

This module is gated behind the arrow Cargo feature. It exposes:

• spectrum_record_schema: the canonical Arrow Schema for a stream of SpectrumRecords.
• SpectrumBatchBuilder: a streaming builder that accumulates rows and produces a RecordBatch when finalized.

The schema is intentionally flat (one row per spectrum). Peak arrays are stored as LargeList<Float64> / LargeList<Float32> so that individual spectra can exceed i32::MAX peaks without truncation. Precursor fields are inlined as nullable scalar columns; an MS1 spectrum has all precursor columns null. This shape is friendly to Polars / DataFusion / DuckDB consumers.

The Arrow schema is part of this crate’s stable surface for the purposes of consumers that pin openproteo-core directly; any column addition is a minor-version bump, any removal or rename is breaking.

Structs

SpectrumBatchBuilder

Streaming builder that accumulates SpectrumRecords and produces a single Arrow RecordBatch when finalized.

Functions

spectrum_record_schema

Return the canonical Schema for a RecordBatch of spectra.