liurenjie1024 commented on code in PR #406:
URL: https://github.com/apache/iceberg-rust/pull/406#discussion_r1641882147
##########
crates/iceberg/src/spec/values.rs:
##########
@@ -105,6 +108,115 @@ pub struct Datum {
literal: PrimitiveLiteral,
}
+impl Serialize for Datum {
+ fn serialize<S: serde::Serializer>(
+ &self,
+ serializer: S,
+ ) -> std::result::Result<S::Ok, S::Error> {
+ let mut strucet_ser = serializer
+ .serialize_struct("Datum", 2)
+ .map_err(serde::ser::Error::custom)?;
+ strucet_ser
+ .serialize_field("type", &self.r#type)
+ .map_err(serde::ser::Error::custom)?;
+ strucet_ser
+ .serialize_field(
+ "literal",
+ &RawLiteral::try_from(
+ Literal::Primitive(self.literal.clone()),
+ &Type::Primitive(self.r#type.clone()),
+ )
+ .unwrap(),
Review Comment:
We should not panic here.
##########
crates/iceberg/src/spec/values.rs:
##########
@@ -105,6 +108,115 @@ pub struct Datum {
literal: PrimitiveLiteral,
}
+impl Serialize for Datum {
+ fn serialize<S: serde::Serializer>(
+ &self,
+ serializer: S,
+ ) -> std::result::Result<S::Ok, S::Error> {
+ let mut strucet_ser = serializer
+ .serialize_struct("Datum", 2)
+ .map_err(serde::ser::Error::custom)?;
+ strucet_ser
+ .serialize_field("type", &self.r#type)
+ .map_err(serde::ser::Error::custom)?;
+ strucet_ser
+ .serialize_field(
+ "literal",
+ &RawLiteral::try_from(
Review Comment:
I think the key here is that we should implement ser/de for `Literal` using
`RawLiteral`, and then derive Ser/De of `Datum`, in this case we can avoid
boilerplate code of ser/de of `Datum`.
##########
crates/iceberg/src/expr/predicate.rs:
##########
@@ -37,6 +38,29 @@ pub struct LogicalExpression<T, const N: usize> {
inputs: [Box<T>; N],
}
+impl<T: Serialize, const N: usize> Serialize for LogicalExpression<T, N> {
+ fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok,
S::Error>
+ where
+ S: serde::Serializer,
+ {
+ self.inputs.serialize(serializer)
+ }
+}
+
+impl<'de, T: Deserialize<'de>, const N: usize> Deserialize<'de> for
LogicalExpression<T, N> {
+ fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
+ where
+ D: serde::Deserializer<'de>,
+ {
+ let inputs = Vec::<Box<T>>::deserialize(deserializer)?;
+ Ok(LogicalExpression::new(
+ array_init::from_iter(inputs.into_iter()).ok_or_else(|| {
+ serde::de::Error::custom("Failed to deserialize
LogicalExpression")
Review Comment:
In what case this may fail? If the only failure is the vec length, we should
make it explicit in error message.
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