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/// Associate physical representations to a typesystem.
///
/// # Example Usage
/// ```ignore
/// pub enum ArrowTypeSystem {
/// Int32(bool),
/// Int64(bool),
/// UInt32(bool),
/// UInt64(bool),
/// Float32(bool),
/// Float64(bool),
/// Boolean(bool),
/// LargeUtf8(bool),
/// LargeBinary(bool),
/// Date32(bool),
/// Date64(bool),
/// Time64(bool),
/// DateTimeTz(bool),
/// }
///
/// impl_typesystem! {
/// system = ArrowTypeSystem,
/// mappings = {
/// { Int32 => i32 }
/// { Int64 => i64 }
/// { UInt32 => u32 }
/// { UInt64 => u64 }
/// { Float64 => f64 }
/// { Float32 => f32 }
/// { Boolean => bool }
/// { LargeUtf8 => String }
/// { LargeBinary => Vec<u8> }
/// { Date32 => NaiveDate }
/// { Date64 => NaiveDateTime }
/// { Time64 => NaiveTime }
/// { DateTimeTz => DateTime<Utc> }
/// }
/// }
/// ```
/// This means for the type system `ArrowTypeSystem`, it's variant `ArrowTypeSystem::Int32(false)` is corresponding to the physical type `i32` and
/// `ArrowTypeSystem::Int32(true)` is corresponding to the physical type `Option<i32>`.
#[macro_export]
macro_rules! impl_typesystem {
(
system = $TS:tt,
mappings = {
$(
{ $($V:tt)|+ => $NT:ty }
)*
}
) => {
impl $crate::typesystem::TypeSystem for $TS {}
$(
impl_typesystem!(@typeassoc $TS [$($V)+], $NT);
)+
impl_typesystem!(@realize $TS $([ [$($V)+] => $NT ])+ );
};
(@typeassoc $TS:tt [$($V:tt)+], $NT:ty) => {
impl<'r> $crate::typesystem::TypeAssoc<$TS> for $NT {
fn check(ts: $TS) -> $crate::errors::Result<()> {
match ts {
$(
$TS::$V(false) => Ok(()),
)+
_ => fehler::throw!($crate::errors::ConnectorXError::TypeCheckFailed(format!("{:?}", ts), std::any::type_name::<$NT>()))
}
}
}
impl<'r> $crate::typesystem::TypeAssoc<$TS> for Option<$NT> {
fn check(ts: $TS) -> $crate::errors::Result<()> {
match ts {
$(
$TS::$V(true) => Ok(()),
)+
_ => fehler::throw!($crate::errors::ConnectorXError::TypeCheckFailed(format!("{:?}", ts), std::any::type_name::<$NT>()))
}
}
}
};
(@realize $TS:tt $([ [$($V:tt)+] => $NT:ty ])+) => {
impl<'r, F> $crate::typesystem::Realize<F> for $TS
where
F: $crate::typesystem::ParameterizedFunc,
$(F: $crate::typesystem::ParameterizedOn<$NT>,)+
$(F: $crate::typesystem::ParameterizedOn<Option<$NT>>,)+
{
fn realize(self) -> $crate::errors::Result<F::Function> {
match self {
$(
$(
$TS::$V(false) => Ok(F::realize::<$NT>()),
)+
$(
$TS::$V(true) => Ok(F::realize::<Option<$NT>>()),
)+
)+
}
}
}
};
}
/// A macro to help define a Transport.
///
/// # Example Usage
/// ```ignore
/// impl_transport!(
/// name = MsSQLArrowTransport,
/// error = MsSQLArrowTransportError,
/// systems = MsSQLTypeSystem => ArrowTypeSystem,
/// route = MsSQLSource => ArrowDestination,
/// mappings = {
/// { Tinyint[u8] => Int32[i32] | conversion auto }
/// { Smallint[i16] => Int32[i32] | conversion auto }
/// { Int[i32] => Int32[i32] | conversion auto }
/// { Bigint[i64] => Int64[i64] | conversion auto }
/// { Intn[IntN] => Int64[i64] | conversion option }
/// { Float24[f32] => Float32[f32] | conversion auto }
/// { Float53[f64] => Float64[f64] | conversion auto }
/// { Floatn[FloatN] => Float64[f64] | conversion option }
/// { Bit[bool] => Boolean[bool] | conversion auto }
/// { Nvarchar[&'r str] => LargeUtf8[String] | conversion owned }
/// { Varchar[&'r str] => LargeUtf8[String] | conversion none }
/// { Nchar[&'r str] => LargeUtf8[String] | conversion none }
/// { Char[&'r str] => LargeUtf8[String] | conversion none }
/// { Text[&'r str] => LargeUtf8[String] | conversion none }
/// { Ntext[&'r str] => LargeUtf8[String] | conversion none }
/// { Binary[&'r [u8]] => LargeBinary[Vec<u8>] | conversion owned }
/// { Varbinary[&'r [u8]] => LargeBinary[Vec<u8>] | conversion none }
/// { Image[&'r [u8]] => LargeBinary[Vec<u8>] | conversion none }
/// { Numeric[Decimal] => Float64[f64] | conversion option }
/// { Decimal[Decimal] => Float64[f64] | conversion none }
/// { Datetime[NaiveDateTime] => Date64[NaiveDateTime] | conversion auto }
/// { Datetime2[NaiveDateTime] => Date64[NaiveDateTime] | conversion none }
/// { Smalldatetime[NaiveDateTime] => Date64[NaiveDateTime] | conversion none }
/// { Date[NaiveDate] => Date32[NaiveDate] | conversion auto }
/// { Datetimeoffset[DateTime<Utc>] => DateTimeTz[DateTime<Utc>] | conversion auto }
/// { Uniqueidentifier[Uuid] => LargeUtf8[String] | conversion option }
/// }
/// );
/// ```
/// This implements a `Transport` called `MsSQLArrowTransport` that can convert types from MsSQL to Arrow.
#[macro_export]
macro_rules! impl_transport {
(
name = $TP:ty,
error = $ET:ty,
systems = $TSS:tt => $TSD:tt,
route = $S:ty => $D:ty,
mappings = {
$(
{ $($TOKENS:tt)+ }
)*
}
) => {
$(
impl_transport!(@cvt $TP, $($TOKENS)+);
)*
impl_transport!(@transport $TP, $ET [$TSS, $TSD] [$S, $D] $([ $($TOKENS)+ ])*);
};
// transport
(@transport $TP:ty, $ET:ty [$TSS:tt, $TSD:tt] [$S:ty, $D:ty] $([ $($TOKENS:tt)+ ])*) => {
impl <'tp> $crate::typesystem::Transport for $TP {
type TSS = $TSS;
type TSD = $TSD;
type S = $S;
type D = $D;
type Error = $ET;
impl_transport!(@cvtts [$TSS, $TSD] $([ $($TOKENS)+ ])*);
impl_transport!(@process [$TSS, $TSD] $([ $($TOKENS)+ ])*);
impl_transport!(@processor [$TSS, $TSD] $([ $($TOKENS)+ ])*, $([ $($TOKENS)+ ])*);
}
};
(@cvtts [$TSS:tt, $TSD:tt] $( [$V1:tt [$T1:ty] => $V2:tt [$T2:ty] | conversion $HOW:ident] )*) => {
fn convert_typesystem(ts: Self::TSS) -> $crate::errors::Result<Self::TSD> {
match ts {
$(
$TSS::$V1(true) => Ok($TSD::$V2(true)),
$TSS::$V1(false) => Ok($TSD::$V2(false)),
)*
#[allow(unreachable_patterns)]
_ => fehler::throw!($crate::errors::ConnectorXError::NoConversionRule(
format!("{:?}", ts), format!("{}", std::any::type_name::<Self::TSD>())
))
}
}
};
(@process [$TSS:tt, $TSD:tt] $([ $V1:tt [$T1:ty] => $V2:tt [$T2:ty] | conversion $HOW:ident ])*) => {
fn process<'s, 'd, 'r>(
ts1: Self::TSS,
ts2: Self::TSD,
src: &'r mut <<Self::S as $crate::sources::Source>::Partition as $crate::sources::SourcePartition>::Parser<'s>,
dst: &'r mut <Self::D as $crate::destinations::Destination>::Partition<'d>,
) -> Result<(), Self::Error> where Self: 'd {
match (ts1, ts2) {
$(
($TSS::$V1(true), $TSD::$V2(true)) => {
let val: Option<$T1> = $crate::sources::PartitionParser::parse(src)?;
let val: Option<$T2> = <Self as TypeConversion<Option<$T1>, _>>::convert(val);
$crate::destinations::DestinationPartition::write(dst, val)?;
Ok(())
}
($TSS::$V1(false), $TSD::$V2(false)) => {
let val: $T1 = $crate::sources::PartitionParser::parse(src)?;
let val: $T2 = <Self as TypeConversion<$T1, _>>::convert(val);
$crate::destinations::DestinationPartition::write(dst, val)?;
Ok(())
}
)*
#[allow(unreachable_patterns)]
_ => fehler::throw!($crate::errors::ConnectorXError::NoConversionRule(
format!("{:?}", ts1), format!("{:?}", ts1))
)
}
}
};
(@processor [$TSS:tt, $TSD:tt] $([ $V1:tt [$T1:ty] => $V2:tt [$T2:ty] | conversion $HOW:ident ])*, $([ $($TOKENS:tt)+ ])*) => {
fn processor<'s, 'd>(
ts1: Self::TSS,
ts2: Self::TSD,
) -> $crate::errors::Result<
fn(
src: &mut <<Self::S as $crate::sources::Source>::Partition as $crate::sources::SourcePartition>::Parser<'s>,
dst: &mut <Self::D as $crate::destinations::Destination>::Partition<'d>,
) -> Result<(), Self::Error>
> where Self: 'd {
match (ts1, ts2) {
$(
($TSS::$V1(true), $TSD::$V2(true)) => {
impl_transport!(@process_func_branch true [ $($TOKENS)+ ])
}
($TSS::$V1(false), $TSD::$V2(false)) => {
impl_transport!(@process_func_branch false [ $($TOKENS)+ ])
}
)*
#[allow(unreachable_patterns)]
_ => fehler::throw!($crate::errors::ConnectorXError::NoConversionRule(
format!("{:?}", ts1), format!("{:?}", ts1))
)
}
}
};
(@process_func_branch $OPT:ident [ $V1:tt [&$L1:lifetime $T1:ty] => $V2:tt [&$L2:lifetime $T2:ty] | conversion $HOW:ident ]) => {
impl_transport!(@process_func_branch $OPT &$T1, &$T2)
};
(@process_func_branch $OPT:ident [ $V1:tt [$T1:ty] => $V2:tt [&$L2:lifetime $T2:ty] | conversion $HOW:ident ]) => {
impl_transport!(@process_func_branch $OPT $T1, &$T2)
};
(@process_func_branch $OPT:ident [ $V1:tt [&$L1:lifetime $T1:ty] => $V2:tt [$T2:ty] | conversion $HOW:ident ]) => {
impl_transport!(@process_func_branch $OPT &$T1, $T2)
};
(@process_func_branch $OPT:ident [ $V1:tt [$T1:ty] => $V2:tt [$T2:ty] | conversion $HOW:ident ]) => {
impl_transport!(@process_func_branch $OPT $T1, $T2)
};
(@process_func_branch true $T1:ty, $T2:ty) => {
Ok(
|s: &mut _, d: &mut _| $crate::typesystem::process::<Option<$T1>, Option<$T2>, Self, Self::S, Self::D, <Self::S as $crate::sources::Source>::Error, <Self::D as $crate::destinations::Destination>::Error, Self::Error>(s, d)
)
};
(@process_func_branch false $T1:ty, $T2:ty) => {
Ok(
|s: &mut _, d: &mut _| $crate::typesystem::process::<$T1, $T2, Self, Self::S, Self::D, <Self::S as $crate::sources::Source>::Error, <Self::D as $crate::destinations::Destination>::Error, Self::Error>(s, d)
)
};
// TypeConversion
(@cvt $TP:ty, $V1:tt [$T1:ty] => $V2:tt [$T2:ty] | conversion $HOW:ident) => {
impl_transport!(@cvt $HOW $TP, $T1, $T2);
};
(@cvt auto $TP:ty, $T1:ty, $T2:ty) => {
impl<'tp, 'r> $crate::typesystem::TypeConversion<$T1, $T2> for $TP {
fn convert(val: $T1) -> $T2 {
val as _
}
}
impl_transport!(@cvt option $TP, $T1, $T2);
};
(@cvt auto_vec $TP:ty, $T1:ty, $T2:ty) => {
impl<'tp, 'r> $crate::typesystem::TypeConversion<$T1, $T2> for $TP {
fn convert(val: $T1) -> $T2 {
val.into_iter().map(|v| v as _).collect()
}
}
impl_transport!(@cvt option $TP, $T1, $T2);
};
(@cvt owned $TP:ty, $T1:ty, $T2:ty) => {
impl<'tp, 'r> $crate::typesystem::TypeConversion<$T1, $T2> for $TP {
fn convert(val: $T1) -> $T2 {
val.to_owned()
}
}
impl_transport!(@cvt option $TP, $T1, $T2);
};
(@cvt option $TP:ty, $T1:ty, $T2:ty) => {
impl<'tp, 'r> $crate::typesystem::TypeConversion<Option<$T1>, Option<$T2>> for $TP {
fn convert(val: Option<$T1>) -> Option<$T2> {
val.map(Self::convert)
}
}
};
(@cvt none $TP:ty, $T1:ty, $T2:ty) => {};
}