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use crate::error::Error;
use parquet_format_async_temp::ConvertedType;
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum PrimitiveConvertedType {
Utf8,
Enum,
Decimal(usize, usize),
Date,
TimeMillis,
TimeMicros,
TimestampMillis,
TimestampMicros,
Uint8,
Uint16,
Uint32,
Uint64,
Int8,
Int16,
Int32,
Int64,
Json,
Bson,
Interval,
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
pub enum GroupConvertedType {
Map,
MapKeyValue,
List,
}
impl TryFrom<(ConvertedType, Option<(i32, i32)>)> for PrimitiveConvertedType {
type Error = Error;
fn try_from(
(ty, maybe_decimal): (ConvertedType, Option<(i32, i32)>),
) -> Result<Self, Self::Error> {
use PrimitiveConvertedType::*;
Ok(match ty {
ConvertedType::UTF8 => Utf8,
ConvertedType::ENUM => Enum,
ConvertedType::DECIMAL => {
if let Some((precision, scale)) = maybe_decimal {
Decimal(precision.try_into()?, scale.try_into()?)
} else {
return Err(general_err!("Decimal requires a precision and scale"));
}
}
ConvertedType::DATE => Date,
ConvertedType::TIME_MILLIS => TimeMillis,
ConvertedType::TIME_MICROS => TimeMicros,
ConvertedType::TIMESTAMP_MILLIS => TimestampMillis,
ConvertedType::TIMESTAMP_MICROS => TimestampMicros,
ConvertedType::UINT_8 => Uint8,
ConvertedType::UINT_16 => Uint16,
ConvertedType::UINT_32 => Uint32,
ConvertedType::UINT_64 => Uint64,
ConvertedType::INT_8 => Int8,
ConvertedType::INT_16 => Int16,
ConvertedType::INT_32 => Int32,
ConvertedType::INT_64 => Int64,
ConvertedType::JSON => Json,
ConvertedType::BSON => Bson,
ConvertedType::INTERVAL => Interval,
_ => {
return Err(general_err!(
"Converted type \"{:?}\" cannot be applied to a primitive type",
ty
))
}
})
}
}
impl TryFrom<ConvertedType> for GroupConvertedType {
type Error = Error;
fn try_from(type_: ConvertedType) -> Result<Self, Self::Error> {
Ok(match type_ {
ConvertedType::LIST => GroupConvertedType::List,
ConvertedType::MAP => GroupConvertedType::Map,
ConvertedType::MAP_KEY_VALUE => GroupConvertedType::MapKeyValue,
_ => {
return Err(Error::OutOfSpec(
"LogicalType value out of range".to_string(),
))
}
})
}
}
impl From<GroupConvertedType> for ConvertedType {
fn from(type_: GroupConvertedType) -> Self {
match type_ {
GroupConvertedType::Map => ConvertedType::MAP,
GroupConvertedType::List => ConvertedType::LIST,
GroupConvertedType::MapKeyValue => ConvertedType::MAP_KEY_VALUE,
}
}
}
impl From<PrimitiveConvertedType> for (ConvertedType, Option<(i32, i32)>) {
fn from(ty: PrimitiveConvertedType) -> Self {
use PrimitiveConvertedType::*;
match ty {
Utf8 => (ConvertedType::UTF8, None),
Enum => (ConvertedType::ENUM, None),
Decimal(precision, scale) => (
ConvertedType::DECIMAL,
Some((precision as i32, scale as i32)),
),
Date => (ConvertedType::DATE, None),
TimeMillis => (ConvertedType::TIME_MILLIS, None),
TimeMicros => (ConvertedType::TIME_MICROS, None),
TimestampMillis => (ConvertedType::TIMESTAMP_MILLIS, None),
TimestampMicros => (ConvertedType::TIMESTAMP_MICROS, None),
Uint8 => (ConvertedType::UINT_8, None),
Uint16 => (ConvertedType::UINT_16, None),
Uint32 => (ConvertedType::UINT_32, None),
Uint64 => (ConvertedType::UINT_64, None),
Int8 => (ConvertedType::INT_8, None),
Int16 => (ConvertedType::INT_16, None),
Int32 => (ConvertedType::INT_32, None),
Int64 => (ConvertedType::INT_64, None),
Json => (ConvertedType::JSON, None),
Bson => (ConvertedType::BSON, None),
Interval => (ConvertedType::INTERVAL, None),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn round_trip() -> Result<(), Error> {
use PrimitiveConvertedType::*;
let a = vec![
Utf8,
Enum,
Decimal(3, 1),
Date,
TimeMillis,
TimeMicros,
TimestampMillis,
TimestampMicros,
Uint8,
Uint16,
Uint32,
Uint64,
Int8,
Int16,
Int32,
Int64,
Json,
Bson,
Interval,
];
for a in a {
let (c, d): (ConvertedType, Option<(i32, i32)>) = a.into();
let e: PrimitiveConvertedType = (c, d).try_into()?;
assert_eq!(e, a);
}
Ok(())
}
}