alamb commented on code in PR #9715:
URL: https://github.com/apache/arrow-rs/pull/9715#discussion_r3118248850
##########
arrow-json/src/reader/list_array.rs:
##########
@@ -134,3 +136,86 @@ impl<O: OffsetSizeTrait, const IS_VIEW: bool> ArrayDecoder
for ListLikeArrayDeco
}
}
}
+
+pub struct FixedSizeListArrayDecoder {
+ field: FieldRef,
+ size: i32,
+ decoder: Box<dyn ArrayDecoder>,
+ ignore_type_conflicts: bool,
+ is_nullable: bool,
+}
+
+impl FixedSizeListArrayDecoder {
+ pub fn new(
+ ctx: &DecoderContext,
+ data_type: &DataType,
+ is_nullable: bool,
+ ) -> Result<Self, ArrowError> {
+ let (field, size) = match data_type {
+ DataType::FixedSizeList(f, s) => (f, *s),
+ _ => unreachable!(),
+ };
+ let decoder = ctx.make_decoder(field.data_type(),
field.is_nullable())?;
+
+ Ok(Self {
+ field: field.clone(),
+ size,
+ decoder,
+ ignore_type_conflicts: ctx.ignore_type_conflicts(),
+ is_nullable,
+ })
+ }
+}
+
+impl ArrayDecoder for FixedSizeListArrayDecoder {
+ fn decode(&mut self, tape: &Tape<'_>, pos: &[u32]) -> Result<ArrayRef,
ArrowError> {
+ let expected = self.size as usize;
+ let mut child_pos = Vec::with_capacity(pos.len() * expected);
+
+ let mut nulls = self
+ .is_nullable
+ .then(|| BooleanBufferBuilder::new(pos.len()));
Review Comment:
Filed a ticket to track
- https://github.com/apache/arrow-rs/issues/9781
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