Scala Inject类代码示例

//设置package包名称以及导入依赖的类
package llsm.algebras

import cats.free.{Free, Inject}
import llsm.InterpolationMethod
import llsm.io.LLSMImg


trait ProcessAPI[F[_]] {
  def deskewImg(img: LLSMImg, shearDim: Int, refDim: Int, shearFactor: Double, interpolation: InterpolationMethod): F[LLSMImg]
}

sealed trait ProcessF[A]

object ProcessAPI {

  case class DeskewImg[A](img: LLSMImg,
                          shearDim: Int,
                          refDim: Int,
                          shearFactor: Double,
                          interpolation: InterpolationMethod,
                          next: LLSMImg => A) extends ProcessF[A]

  implicit val process = new ProcessAPI[ProcessF] {
    def deskewImg(img: LLSMImg, shearDim: Int, refDim: Int, shearFactor: Double, interpolation: InterpolationMethod): ProcessF[LLSMImg] =
      DeskewImg(img, shearDim, refDim, shearFactor, interpolation, identity)
  }

  implicit def processInject[F[_], G[_]](implicit F: ProcessAPI[F], I: Inject[F, G]): ProcessAPI[Free[G, ?]] =
    new ProcessAPI[Free[G, ?]] {
      def deskewImg(img: LLSMImg, shearDim: Int, refDim: Int, shearFactor: Double, interpolation: InterpolationMethod): Free[G, LLSMImg] =
        Free.inject[F, G](F.deskewImg(img, shearDim, refDim, shearFactor, interpolation))
    }
} 

//设置package包名称以及导入依赖的类
package llsm.algebras

import cats.free.{Free, Inject}

trait ConfigAPI[F[_]] {
  def get[A](key: String): F[Option[A]]
  def put[A](key: String, value: A): F[Unit]
  def delete(key: String): F[Unit]
  def update[A](key: String, f: A => A): F[Unit]
}

sealed trait ConfigF[A]
case class Get[A, T](key: String, next: Option[T] => A) extends ConfigF[A]
case class Put[A, T](key: String, value: T, next: Unit => A) extends ConfigF[A]
case class Delete[A](key: String, next: Unit => A) extends ConfigF[A]

object ConfigAPI {
  def apply[F[_]](implicit ev: ConfigAPI[Free[F, ?]]): ConfigAPI[Free[F, ?]] = ev

  implicit val config = new ConfigAPI[ConfigF] {
    def get[A](key: String): ConfigF[Option[A]] = Get[Option[A], A](key, identity)
    def put[A](key: String, value: A): ConfigF[Unit] = Put(key, value, identity)
    def delete(key: String): ConfigF[Unit] = Delete(key, identity)
    def update[A](key: String, f: A => A): ConfigF[Unit] =
      Get(key, (a: Option[A]) => a match {
        case Some(a) => { put[A](key, f(a)); ()}
        case None => ()
      })
  }

  implicit def configInject[F[_], G[_]](implicit F: ConfigAPI[F], I: Inject[F, G]): ConfigAPI[Free[G, ?]] =
    new ConfigAPI[Free[G, ?]] {
      def get[A](key: String): Free[G, Option[A]] = Free.inject[F, G](F.get[A](key))
      def put[A](key: String, value: A): Free[G, Unit] = Free.inject[F, G](F.put[A](key, value))
      def delete(key: String): Free[G, Unit] = Free.inject[F, G](F.delete(key))
      def update[A](key: String, f: A => A): Free[G, Unit] = Free.inject[F, G](F.update(key, f))
    }
} 

//设置package包名称以及导入依赖的类
package llsm.algebras

import cats.free.{Free, Inject}

trait ProgressAPI[F[_]] {
  def progress(value: Int, max: Int): F[Unit]
  def status(message: String): F[Unit]
}

sealed trait ProgressF[A]

object ProgressAPI {

  case class Progress(value: Int, max: Int) extends ProgressF[Unit]
  case class Status(message: String) extends ProgressF[Unit]

  implicit val progress = new ProgressAPI[ProgressF] {
    def progress(value: Int, max: Int): ProgressF[Unit] =
      Progress(value, max)
    def status(message: String): ProgressF[Unit] =
      Status(message)
  }

  implicit def progressInject[F[_], G[_]](
    implicit
    F: ProgressAPI[F],
    I: Inject[F, G]
  ): ProgressAPI[Free[G, ?]] =
    new ProgressAPI[Free[G, ?]] {
      def progress(value: Int, max: Int): Free[G, Unit] =
        Free.inject[F, G](F.progress(value, max))
      def status(message: String): Free[G, Unit] =
        Free.inject[F, G](F.status(message))
    }
} 

//设置package包名称以及导入依赖的类
package llsm.algebras

import cats.free.{Free, Inject}

trait LoggingAPI[F[_]] {
  def info(msg: String): F[Unit]
  def infoCause(msg: String, cause: Throwable): F[Unit]
  def warn(msg: String): F[Unit]
  def warnCause(msg: String, cause: Throwable): F[Unit]
  def debug(msg: String): F[Unit]
  def debugCause(msg: String, cause: Throwable): F[Unit]
  def error(msg: String): F[Unit]
  def errorCause(msg: String, cause: Throwable): F[Unit]
  def trace(msg: String): F[Unit]
  def traceCause(msg: String, cause: Throwable): F[Unit]
}

sealed trait LoggingF[A]

object LoggingAPI {
  def apply[F[_]](implicit ev: LoggingAPI[F]): LoggingAPI[F] = ev

  case class Info(msg: String) extends LoggingF[Unit]
  case class InfoCause(msg: String, cause: Throwable) extends LoggingF[Unit]
  case class Warn(msg: String) extends LoggingF[Unit]
  case class WarnCause(msg: String, cause: Throwable) extends LoggingF[Unit]
  case class Debug(msg: String) extends LoggingF[Unit]
  case class DebugCause(msg: String, cause: Throwable) extends LoggingF[Unit]
  case class Error(msg: String) extends LoggingF[Unit]
  case class ErrorCause(msg: String, cause: Throwable) extends LoggingF[Unit]
  case class Trace(msg: String) extends LoggingF[Unit]
  case class TraceCause(msg: String, cause: Throwable) extends LoggingF[Unit]


  implicit val logging = new LoggingAPI[LoggingF] {
    def info(msg: String): LoggingF[Unit] = LoggingAPI.Info(msg)
    def infoCause(msg: String, cause: Throwable): LoggingF[Unit] = LoggingAPI.InfoCause(msg, cause)
    def warn(msg: String): LoggingF[Unit] = LoggingAPI.Warn(msg)
    def warnCause(msg: String, cause: Throwable): LoggingF[Unit] = LoggingAPI.WarnCause(msg, cause)
    def debug(msg: String): LoggingF[Unit] = LoggingAPI.Debug(msg)
    def debugCause(msg: String, cause: Throwable): LoggingF[Unit] = LoggingAPI.DebugCause(msg, cause)
    def error(msg: String): LoggingF[Unit] = LoggingAPI.Error(msg)
    def errorCause(msg: String, cause: Throwable): LoggingF[Unit] = LoggingAPI.ErrorCause(msg, cause)
    def trace(msg: String): LoggingF[Unit] = LoggingAPI.Trace(msg)
    def traceCause(msg: String, cause: Throwable): LoggingF[Unit] = LoggingAPI.TraceCause(msg, cause)
  }

  implicit def loggingInject[F[_], G[_]](implicit F: LoggingAPI[F], I: Inject[F, G]): LoggingAPI[Free[G, ?]] =
    new LoggingAPI[Free[G, ?]] {
      def info(msg: String): Free[G, Unit] = Free.inject[F, G](F.info(msg))
      def infoCause(msg: String, cause: Throwable): Free[G, Unit] = Free.inject[F, G](F.infoCause(msg, cause))
      def warn(msg: String): Free[G, Unit] = Free.inject[F, G](F.warn(msg))
      def warnCause(msg: String, cause: Throwable): Free[G, Unit] = Free.inject[F, G](F.warnCause(msg, cause))
      def debug(msg: String): Free[G, Unit] = Free.inject[F, G](F.debug(msg))
      def debugCause(msg: String, cause: Throwable): Free[G, Unit] = Free.inject[F, G](F.debugCause(msg, cause))
      def error(msg: String): Free[G, Unit] = Free.inject[F, G](F.error(msg))
      def errorCause(msg: String, cause: Throwable): Free[G, Unit] = Free.inject[F, G](F.errorCause(msg, cause))
      def trace(msg: String): Free[G, Unit] = Free.inject[F, G](F.trace(msg))
      def traceCause(msg: String, cause: Throwable): Free[G, Unit] = Free.inject[F, G](F.traceCause(msg, cause))
    }
} 

//设置package包名称以及导入依赖的类
package llsm.algebras

import java.nio.file.Path
import cats.free.{Free, Inject}

import llsm.io.LLSMImg
import llsm.io.metadata.FileMetadata

trait ImgWriterAPI[F[_]] {
  def writeImg(path: Path, img: LLSMImg): F[FileMetadata]
}

sealed trait ImgWriterF[A]

object ImgWriterAPI {
  def apply[F[_]](implicit ev: ImgWriterAPI[F]): ImgWriterAPI[F] = ev

  case class WriteImg[A](path: Path, img: LLSMImg, next: FileMetadata => A) extends ImgWriterF[A]

  implicit val imgWriter = new ImgWriterAPI[ImgWriterF] {
    def writeImg(path: Path, img: LLSMImg): ImgWriterF[FileMetadata] = WriteImg(path, img, identity)
  }

  implicit def imgWriterInject[F[_], G[_]](implicit F: ImgWriterAPI[F], I: Inject[F, G]): ImgWriterAPI[Free[G, ?]] =
    new ImgWriterAPI[Free[G, ?]] {
      def writeImg(path: Path, img: LLSMImg): Free[G, FileMetadata] =
        Free.inject[F, G](F.writeImg(path, img))
    }
}

sealed trait LowWriterF[A]
case class WriteOMETIFF(path: Path, img: LLSMImg) extends LowWriterF[FileMetadata]
case class WriteHDF5(path: Path, img: LLSMImg) extends LowWriterF[FileMetadata]

object LowWriterAPI {
  def writeOMETIFF(path: Path, img: LLSMImg): Free[LowWriterF, FileMetadata] =
    Free.liftF[LowWriterF, FileMetadata](WriteOMETIFF(path, img))
  def writeHDF5(path: Path, img: LLSMImg): Free[LowWriterF, FileMetadata] =
    Free.liftF[LowWriterF, FileMetadata](WriteHDF5(path, img))
} 

//设置package包名称以及导入依赖的类
import cats._
import cats.free.{Free, Inject}
import sio.core._
import sio.teletype
import sio.core.instances.all._
import sio.core.syntax.st._

object free {
  sealed abstract class Interact[A] extends Product with Serializable
  object Interact {
    final case class Ask(message: String) extends Interact[String]
    final case class Tell(message: String) extends Interact[Unit]
  }

  class Interacts[F[_]](implicit F: Inject[Interact, F]) {
    def ask(message: String): Free[F, String] = Free.inject(Interact.Ask(message))
    def tell(message: String): Free[F, Unit] = Free.inject(Interact.Tell(message))
  }
  object Interacts {
    implicit def interacts[F[_]](implicit I: Inject[Interact, F]): Interacts[F] = new Interacts[F]
  }

  type App[A] = Interact[A]

  def program(implicit I: Interacts[App]): Free[App, Unit] = {
    import I._

    for {
      name <- ask("Hello, what's your name?")
      _    <- tell(s"Hey, $name")
    } yield ()
  }

  object InteractIOInterpreter extends (Interact ~> ST[RW, ?]) {
    def apply[A](i: Interact[A]) = i match {
      case Interact.Ask(x) => teletype.putStrLn(x) >> teletype.getLine
      case Interact.Tell(x) => teletype.putStrLn(x)
    }
  }

  def main: IO[Unit] = program.foldMap(InteractIOInterpreter)
} 

//设置package包名称以及导入依赖的类
package me.panavtec.tictactoe

import cats.free.{Free, Inject}
import cats.{Id, ~>}
import me.panavtec.tictactoe.Domain._

import scala.io.StdIn

sealed trait Console[A]
case object ReadLine extends Console[Coordinate]
case class PrintLine(line: String) extends Console[Unit]

object Console {
  val interpreter: Console ~> Id = new (Console ~> Id) {
    override def apply[A](fa: Console[A]): Id[A] = {
      fa match {
        case ReadLine => Coordinate.fromString(StdIn.readLine).get
        case PrintLine(line) => println(line)
      }
    }
  }
}

class ConsoleOps[F[_]](implicit I: Inject[Console, F]) {
  def readLine: Free[F, Coordinate] = Free.inject(ReadLine)

  def printLine(line: String): Free[F, Unit] = Free.inject(PrintLine(line))
}

object ConsoleOps {
  implicit def console[F[_]](implicit I: Inject[Console, F]): ConsoleOps[F] = new ConsoleOps[F]
} 

//设置package包名称以及导入依赖的类
package me.panavtec.tictactoe

import cats.free.{Free, Inject}
import cats.{Id, ~>}
import me.panavtec.tictactoe.Domain.{Board, Mark, O_, X_}
import me.panavtec.tictactoe.GameEngine.{GameState, PlayerInput}

sealed trait Game[A]
case object Start extends Game[GameState]
case class PlayAt(board: Board, playerInput: PlayerInput) extends Game[GameState]

object Game {
  val interpreter: Game ~> Id = new (Game ~> Id) {
    override def apply[A](fa: Game[A]): Id[A] = {
      fa match {
        case Start => (X_, Board.emptyBoard)
        case PlayAt(board, (coordinate, X_)) => (O_, Board.playAt(board, coordinate, X_))
        case PlayAt(board, (coordinate, O_)) => (X_, Board.playAt(board, coordinate, O_))
      }
    }
  }

  def hasFinished(gs: GameState): Boolean = gs match {
    case (_ , b) => Board.hasPlayerWon(b) || Board.isBoardFull(b)
  }
}

class GameOps[F[_]](implicit I: Inject[Game, F]) {
  def startGame: Free[F, GameState] = Free.inject(Start)

  def playNext(board: Board, playerInput: PlayerInput): Free[F, GameState] = Free.inject(PlayAt(board, playerInput))
}

object GameOps {
  implicit def turn[F[_]](implicit I: Inject[Game, F]): GameOps[F] = new GameOps[F]
} 

//设置package包名称以及导入依赖的类
package org.scalaexercises.evaluator.free.algebra

import cats.free.{Free, Inject}
import org.scalaexercises.evaluator.EvaluatorResponses.EvaluationResponse
import org.scalaexercises.evaluator.{Dependency, EvalResponse}

sealed trait EvaluatorOp[A]
final case class Evaluates(
    url: String,
    authKey: String,
    resolvers: List[String] = Nil,
    dependencies: List[Dependency] = Nil,
    code: String)
    extends EvaluatorOp[EvaluationResponse[EvalResponse]]

class EvaluatorOps[F[_]](implicit I: Inject[EvaluatorOp, F]) {

  def evaluates(
      url: String,
      authKey: String,
      resolvers: List[String] = Nil,
      dependencies: List[Dependency] = Nil,
      code: String
  ): Free[F, EvaluationResponse[EvalResponse]] =
    Free.inject[EvaluatorOp, F](Evaluates(url, authKey, resolvers, dependencies, code))

}

object EvaluatorOps {

  implicit def instance[F[_]](implicit I: Inject[EvaluatorOp, F]): EvaluatorOps[F] =
    new EvaluatorOps[F]

} 

//设置package包名称以及导入依赖的类
package com.gilesc

import java.time.ZonedDateTime

import cats.free.{Inject, Free}
import cats.free.Free.liftF
import cats.{Id, ~>}

case class User(id: Long, username: String, email: String, password: String, createdAt: ZonedDateTime)

sealed trait RegistrationAction[A]

case class RegistrationContext(username: String, email: String, password: String, confirmation: String)
case class Register(cxt: RegistrationContext) extends RegistrationAction[Option[User]]

class RegistrationActions[F[_]](implicit I: Inject[RegistrationAction, F]) {
  def register(cxt: RegistrationContext) = Free.inject[RegistrationAction, F](Register(cxt))
}

object RegistrationActions {
  implicit def actions[F[_]](implicit I: Inject[RegistrationAction, F]): RegistrationActions[F] = new RegistrationActions[F]
}

object TestRegistrationInterpreter extends (RegistrationAction ~> Id) {
  val users = List.empty[User]
  override def apply[A](fa: RegistrationAction[A]): Id[A] = fa match {
    case Register(cxt) =>
      val time = ZonedDateTimeInterpreter.apply(GetCurrentTime)
      Some(User(users.size, cxt.username, cxt.email, cxt.password, time))
  }
} 

//设置package包名称以及导入依赖的类
package com.gilesc

import cats.free.{Free, Inject}
import cats.{Id, ~>}

trait LoggingAction[A]

sealed trait LogLevel
case object Debug extends LogLevel { override def toString = "[debug] - "}
case object Info extends LogLevel { override def toString = "[info] - "}
case object Warn extends LogLevel { override def toString = "[warn] - "}
case object Error extends LogLevel { override def toString = "[error] - "}

case class Logger(message: String, level: LogLevel) extends LoggingAction[Unit] {
  override def toString = level.toString + message
}

class LoggingActions[F[_]](implicit I: Inject[LoggingAction, F]) {
  def log(message: String, level: LogLevel) = Free.inject[LoggingAction,F](Logger(message, level))

  case object log {
    def debug(message: String) = Free.inject[LoggingAction,F](Logger(message, Debug))
    def info(message: String) = Free.inject[LoggingAction,F](Logger(message, Info))
    def warn(message: String) = Free.inject[LoggingAction,F](Logger(message, Warn))
    def error(message: String) = Free.inject[LoggingAction,F](Logger(message, Error))
  }
}

object LoggingActions {
  implicit def actions[F[_]](implicit I: Inject[LoggingAction, F]): LoggingActions[F] = new LoggingActions[F]
}

object ConsoleLoggingInterpreter extends (LoggingAction ~> Id) {
  def apply[A](fa: LoggingAction[A]): Id[A] = fa match {
    case Logger(a,b) => println(b+a)
  }
} 

//设置package包名称以及导入依赖的类
package services.free

import cats.free.{Free, Inject}
import cats.~>
import monix.eval.Task

object DataOps {
  sealed trait DSL[A]
  final case class Add(value: String) extends DSL[Option[String]]
  final case class FindAll() extends DSL[List[String]]
}

final class DataOpService[F[_]](implicit I: Inject[DataOps.DSL, F]) {
  import DataOps._
  def add(value: String): Free[F, Option[String]] = Free.inject[DSL, F](Add(value))
  def findAll: Free[F, List[String]] = Free.inject[DSL, F](FindAll())
}
object DataOpService {
  implicit def dataOps[F[_]](implicit I: Inject[DataOps.DSL, F]): DataOpService[F] = new DataOpService[F]
}


final class InMemoryDataOpInterpreter extends (DataOps.DSL ~> Task) {
  import DataOps._

  private[this] val storage = new scala.collection.mutable.HashSet[String]

  def apply[A](d: DSL[A]) = d match {
    case Add(a) => Task { if (storage.add(a)) Some(a) else None }
    case FindAll() => Task { storage.toList.sorted }
  }
} 

//设置package包名称以及导入依赖的类
package services.free

import cats.free.{Free, Inject}
import cats.~>
import monix.eval.Task

object Logs {
  sealed trait DSL[A]
  final case class Add(a: String) extends DSL[Unit]
  final case class Show() extends DSL[List[String]]
}

final class LogService[F[_]](implicit I: Inject[Logs.DSL, F]) {
  import Logs._
  def add(a: String): Free[F, Unit] = Free.inject[DSL, F](Add(a))
  def show: Free[F, List[String]] = Free.inject[DSL, F](Show())
}
object LogService {
  implicit def logs[F[_]](implicit I: Inject[Logs.DSL, F]): LogService[F] = new LogService[F]
}


final class LogInterpreter extends (Logs.DSL ~> Task) {
  import Logs._

  private[this] val storage = new scala.collection.mutable.ListBuffer[String]

  def apply[A](l: DSL[A]) = l match {
    case Add(a) => Task { storage.append(a) }
    case Show() => Task { storage.toList }
  }
} 

//设置package包名称以及导入依赖的类
package services.free

import cats.free.{Free, Inject}
import cats.~>
import monix.eval.Task

object Interactions {
  sealed trait DSL[A]
  final case class Get(input: String) extends DSL[String]
  final case class Print(msg: String) extends DSL[Unit]
}

final class InteractionService[F[_]](implicit I: Inject[Interactions.DSL, F]) {
  import Interactions._
  def get(input: String): Free[F, String] = Free.inject[DSL, F](Get(input))
  def print(msg: String): Free[F, Unit] = Free.inject[DSL, F](Print(msg))
}
object InteractionService {
  implicit def actions[F[_]](implicit I: Inject[Interactions.DSL, F]): InteractionService[F] = new InteractionService[F]
}


final class InteractionInterpreter(read: () => String) extends (Interactions.DSL ~> Task) {
  import Interactions._
  def apply[A](a: DSL[A]) = a match {
    case Get(input) => Task { println(input); read() }
    case Print(msg) => Task { println(msg) }
  }
} 

//设置package包名称以及导入依赖的类
package control.free

import cats.free.{Free, Inject}
import cats.{Id, ~>}
import CounterA._

sealed trait CounterA[A]

object CounterA {
  final case class Set(n: Int) extends CounterA[Unit]
  final case class Add(n: Int) extends CounterA[Unit]
  final case class Subtract(n: Int) extends CounterA[Unit]
  final case object Get extends CounterA[Int]
  final case object Reset extends CounterA[Unit]
}

class Counter[F[_]](implicit I: Inject[CounterA, F]) {
  def set(n: Int): Free[F, Unit] = Free.inject[CounterA, F](Set(n))
  def add(n: Int): Free[F, Unit] = Free.inject[CounterA, F](Add(n))
  def subtract(n: Int): Free[F, Unit] = Free.inject[CounterA, F](Subtract(n))
  def get: Free[F, Int] = Free.inject[CounterA, F](Get)
  def reset: Free[F, Unit] = Free.inject[CounterA, F](Reset)
}

object Counter {
  implicit def counter[F[_]](implicit I: Inject[CounterA, F]): Counter[F] = new Counter[F]

  def interpreter: Interpreter = new Interpreter

  class Interpreter extends (CounterA ~> Id) {
    var curN: Int = _

    def apply[A](fa: CounterA[A]): Id[A] = fa match {
      case Set(n) =>
        curN = n
        ()
      case Add(n) =>
        curN = curN + n
        ()
      case Subtract(n) =>
        curN = curN - n
        ()
      case Get =>
        curN
      case Reset =>
        curN = 0
        ()
    }
  }

  object Interpreter {
    def copy: Interpreter => Interpreter = i => {
      val res = new Interpreter
      res.curN = i.curN
      res
    }
  }
}