[ARROW-10396] [Rust] [Parquet] Expose SliceableCursor and FileSource

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Component/s: Rust
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26379
• Assignee: Andrew Lamb
• Reporter: Andrew Lamb
• Created: 26/Oct/20 22:56
• Updated: 11/Jan/23 11:13
• Resolved: 31/Oct/20 22:50

Description

https://github.com/apache/arrow/commit/7155cd5488310c15d864428252ca71dd9ebd3b48 Reworked how the parquet reader traits were implemented to be interms of a `ChunkReader` trait (for the better, in my opinion).

That commit includes two helper classes, `SliceableCursor` and `FileSource`, which implement `ChunkReader` for a `Cursor` like thing and `File`s, respectively

My project uses the parquet SerializedFileWriter with things that look like `File` and `Cursor` and thus I would like to re-use the logic in `SliceableCursor` and `FileSource` without having to copy/paste them.

Issue Links

• links to: GitHub Pull Request #8534