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io.doolse.simpledba.BuiltQueries.scala Maven / Gradle / Ivy
package io.doolse.simpledba
import cats.Eval
import shapeless.Poly1
import shapeless.tag.@@
/**
* Created by jolz on 8/06/16.
*/
trait BuiltQueries[Q] {
type DDL
def queries: Q
def ddl: Iterable[DDL]
}
object BuiltQueries {
type Aux[Q, DDL0] = BuiltQueries[Q] {type DDL = DDL0}
def apply[Q, DDL0](q: Q, _ddl: Eval[Iterable[DDL0]]) : Aux[Q, DDL0] = new BuiltQueries[Q] {
type DDL = DDL0
def queries = q
def ddl = _ddl.value
}
}
trait queriesAsLP extends Poly1 {
implicit def sq[F[_], FA, FB, T, A, B]
(implicit ev: FA <:< UniqueQuery[F, T, A], ev2: FB <:< UniqueQuery[F, T, B],
conv: ValueConvert[B, A]) = at[FA @@ FB] {
ev(_).as[B]
}
implicit def rq[F[_], FA, FB, T, SA, SB, A, B]
(implicit ev: FA <:< RangeQuery[F, T, A, SA], ev2: FB <:< RangeQuery[F, T, B, SB],
cv: ValueConvert[B, A], cv2: ValueConvert[SB, SA]) = at[FA @@ FB] {
ev(_).as[B, SB]
}
implicit def mq[F[_], FA, FB, T, A, B, SA]
(implicit ev: FA <:< RangeQuery[F, T, A, SA], ev2: FB <:< SortableQuery[F, T, B],
conv: ValueConvert[B, A]) = at[FA @@ FB] { fa =>
val rq = ev(fa)
SortableQuery[F, T, B](None, (b, ascO) => rq._q(conv(b), NoRange, NoRange, ascO))
}
}
object queriesAs extends queriesAsLP {
implicit def same[A, B](implicit ev: A <:< B) = at[A @@ B](a => a: B)
}
