alamb commented on code in PR #7997:
URL: https://github.com/apache/arrow-rs/pull/7997#discussion_r2236780726


##########
parquet/src/arrow/arrow_reader/decoder/metadata.rs:
##########
@@ -0,0 +1,299 @@
+use crate::arrow::arrow_reader::decoder::buffers::Buffers;
+use crate::arrow::arrow_reader::decoder::DecodeResult;
+use crate::errors::ParquetError;
+use crate::file::metadata::{ParquetMetaData, ParquetMetaDataReader};
+
+/// A push decoder for [`ParquetMetaData`].

Review Comment:
   I am pretty chuffed (to borrow a term I learned from @tustvold ) with how 
this API works
   
   It implements an API for for metadata decoding that is completely decoupled 
from I/O
   
   I am pretty close to the same type of API for the actual parquet decoder. 



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