Reflection-based protobuf parser only returns single component#11459
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Reflection-based protobuf parser only returns single component#11459
protobuf parser only returns single component#11459Conversation
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Pull Request Overview
This PR refactors the protobuf reflection parser to consolidate protobuf messages into a single component instead of splitting them into multiple field-based components. This simplifies data extraction from lenses and ensures each protobuf message remains self-contained.
- Changed from field-based component structure to single message component
- Modified parser to use a single StructBuilder wrapped in a FixedSizeListBuilder
- Updated component naming from individual fields to a unified "message" component
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| crates/utils/re_mcap/src/layers/protobuf.rs | Core refactoring of protobuf parser from field-based to message-based structure |
| crates/utils/re_mcap/src/layers/snapshots/re_mcap__layers__protobuf__test__two_simple_rows.snap | Updated test snapshot reflecting new single-component output format |
Comments suppressed due to low confidence (1)
crates/utils/re_mcap/src/layers/protobuf.rs:1
- [nitpick] This function uses a long chain of if-else statements that could be simplified using a match-based approach or a trait-based solution. Consider extracting this logic into a trait implementation for ArrayBuilder types or using a macro to reduce code duplication.
use arrow::{
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grtlr
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protobuf parser only returns single component
oxkitsune
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Oct 8, 2025
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| fn append_null_to_builder(builder: &mut dyn ArrayBuilder) -> Result<(), ProtobufError> { |
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would be nice if ArrayBuilder implemented append_null 🥲
Wumpf
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) ### Related * Closes RR-2552. * Related to RR-2553. * Related to #11394. * [x] Requires #11458. ### What This changes our `protobuf` reflection code to put the entire message behind a single component to make it easier to extract it from lenses. This also guarantees that each protobuf message is always self-contained.
grtlr
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Oct 10, 2025
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Related
Lensas a concept for semantic mapping of arbitrary data #11394.protobufmessages asStructArray#11458.What
This changes our
protobufreflection code to put the entire message behind a single component to make it easier to extract it from lenses. This also guarantees that each protobuf message is always self-contained.