yordan-pavlov commented on a change in pull request #1041:
URL: https://github.com/apache/arrow-rs/pull/1041#discussion_r774811305
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File path: parquet/src/column/reader/decoder.rs
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@@ -0,0 +1,215 @@
+use std::collections::HashMap;
+use std::ops::Range;
+
+use crate::basic::Encoding;
+use crate::data_type::DataType;
+use crate::decoding::{get_decoder, Decoder, DictDecoder, PlainDecoder};
+use crate::encodings::rle::RleDecoder;
+use crate::errors::{ParquetError, Result};
+use crate::memory::ByteBufferPtr;
+use crate::schema::types::ColumnDescPtr;
+use crate::util::bit_util::BitReader;
+
+/// A type that can have level data written to it by a [`ColumnLevelDecoder`]
+pub trait LevelsWriter {
+ fn capacity(&self) -> usize;
+
+ fn get(&self, idx: usize) -> i16;
Review comment:
I would expect a level writer to have a `write` method rather than a
`get` method (it's a level writer, not a level getter)
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