manojkarthick commented on a change in pull request #9306:
URL: https://github.com/apache/arrow/pull/9306#discussion_r567264445
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File path: rust/parquet/src/record/api.rs
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@@ -635,6 +648,55 @@ impl Field {
_ => nyi!(descr, value),
}
}
+
+ #[cfg(feature = "json_output")]
+ pub fn to_json_value(&self) -> Value {
+ match &self {
+ Field::Null => Value::Null,
+ Field::Bool(b) => Value::Bool(*b),
+ Field::Byte(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::Short(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::Int(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::Long(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::UByte(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::UShort(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::UInt(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::ULong(n) => Value::Number(serde_json::Number::from(*n)),
+ Field::Float(n) => serde_json::Number::from_f64(*n as f64)
+ .map(Value::Number)
+ .unwrap_or(Value::Null),
+ Field::Double(n) => serde_json::Number::from_f64(*n)
+ .map(Value::Number)
+ .unwrap_or(Value::Null),
+ Field::Decimal(n) => Value::String(convert_decimal_to_string(&n)),
+ Field::Str(s) => Value::String(s.to_owned()),
+ Field::Bytes(b) => Value::String(base64::encode(b.data())),
+ Field::Date(d) => Value::String(convert_date_to_string(*d)),
+ Field::TimestampMillis(ts) => {
+ Value::String(convert_timestamp_millis_to_string(*ts))
+ }
+ Field::TimestampMicros(ts) => {
+ Value::String(convert_timestamp_micros_to_string(*ts))
+ }
+ Field::Group(row) => row.to_json_value(),
+ Field::ListInternal(fields) => {
+ Value::Array(fields.elements.iter().map(|f|
f.to_json_value()).collect())
+ }
+ Field::MapInternal(map) => Value::Object(
+ map.entries
+ .iter()
+ .map(|(key_field, value_field)| {
+ let key_val = key_field.to_json_value();
+ let key_str = key_val
+ .as_str()
+ .map(|s| s.to_owned())
+ .unwrap_or_else(|| key_val.to_string());
+ (key_str, value_field.to_json_value())
+ })
+ .collect(),
+ ),
+ }
+ }
}
Review comment:
I've also updated the PR and added the test:
[test_to_json_value](https://github.com/apache/arrow/pull/9306/files#diff-d6de2aa116b82bf7bfdf40fcbad13dc947139ce7a703990517662ae25eab0159R1676)
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