add mirror context

src/main/scala/minisql/context/MirrorContext.scala

@@ -0,0 +1,15 @@
+package minisql
+
+import minisql.context.mirror.*
+
+class MirrorContext[Idiom <: idiom.Idiom, Naming <: NamingStrategy](
+  val idiom: Idiom,
+  val naming: Naming
+) extends context.Context[Idiom, Naming] {
+
+  type DBRow = Row
+
+  type DBResultSet = Iterable[DBRow]
+
+  type DBStatement = IArray[Any]
+}

src/main/scala/minisql/context/mirror.scala

@@ -0,0 +1,35 @@
+package minisql.context.mirror
+
+import minisql.{MirrorContext, NamingStrategy}
+import minisql.idiom.Idiom
+import minisql.util.Messages.fail
+import scala.reflect.ClassTag
+
+/**
+* No extra class defined
+*/
+opaque type Row = IArray[Any] *: EmptyTuple
+
+extension (r: Row) {
+
+  def data: IArray[Any] = r._1
+
+  def add(value: Any): Row = (r.data :+ value) *: EmptyTuple
+
+  def apply[T](idx: Int)(using t: ClassTag[T]): T = {
+    r.data(idx) match {
+      case v: T => v
+      case other =>
+        fail(
+          s"Invalid column type. Expected '${t.runtimeClass}', but got '$other'"
+        )
+    }
+  }
+}
+
+trait MirrorCodecs[I <: Idiom, N <: NamingStrategy] {
+  this: MirrorContext[I, N] =>
+
+  given byteEncoder: Encoder[Byte]
+
+}