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/*
 * Copyright (c) 2014-2015 by its authors. Some rights reserved.
 * See the project's home at: https://github.com/monifu/asterix
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package asterix.atomic

trait AtomicBuilder[T, R <: Atomic[T]] {
  def buildInstance(initialValue: T): R
}

private[atomic] object Implicits {
  trait Level1 {
    implicit def AtomicRefBuilder[T]: AtomicBuilder[T, AtomicAny[T]] =
      new AtomicBuilder[T, AtomicAny[T]] {
        def buildInstance(initialValue: T) =
          AtomicAny(initialValue)
      }
    }

  trait Level2 extends Level1 {
    implicit def AtomicNumberBuilder[T : Numeric]: AtomicBuilder[T, AtomicNumberAny[T]] =
      new AtomicBuilder[T, AtomicNumberAny[T]] {
        def buildInstance(initialValue: T) =
          AtomicNumberAny(initialValue)
      }
  }

  trait Level3 extends Level2 {
    implicit val AtomicIntBuilder: AtomicBuilder[Int, AtomicInt] =
      new AtomicBuilder[Int, AtomicInt] {
        def buildInstance(initialValue: Int) =
          AtomicInt(initialValue)
      }

    implicit val AtomicLongBuilder: AtomicBuilder[Long, AtomicLong] =
      new AtomicBuilder[Long, AtomicLong] {
        def buildInstance(initialValue: Long) =
          AtomicLong(initialValue)
      }

    implicit val AtomicBooleanBuilder: AtomicBuilder[Boolean, AtomicBoolean] =
      new AtomicBuilder[Boolean, AtomicBoolean] {
        def buildInstance(initialValue: Boolean) =
          AtomicBoolean(initialValue)
      }

    implicit val AtomicByteBuilder: AtomicBuilder[Byte, AtomicByte] =
      new AtomicBuilder[Byte, AtomicByte] {
        def buildInstance(initialValue: Byte): AtomicByte =
          AtomicByte(initialValue)
      }

    implicit val AtomicCharBuilder: AtomicBuilder[Char, AtomicChar] =
      new AtomicBuilder[Char, AtomicChar] {
        def buildInstance(initialValue: Char): AtomicChar =
          AtomicChar(initialValue)
      }

    implicit val AtomicShortBuilder: AtomicBuilder[Short, AtomicShort] =
      new AtomicBuilder[Short, AtomicShort] {
        def buildInstance(initialValue: Short): AtomicShort =
          AtomicShort(initialValue)
      }

    implicit val AtomicFloatBuilder: AtomicBuilder[Float, AtomicFloat] =
      new AtomicBuilder[Float, AtomicFloat] {
        def buildInstance(initialValue: Float): AtomicFloat =
          AtomicFloat(initialValue)
      }

    implicit val AtomicDoubleBuilder: AtomicBuilder[Double, AtomicDouble] =
      new AtomicBuilder[Double, AtomicDouble] {
        def buildInstance(initialValue: Double): AtomicDouble =
          AtomicDouble(initialValue)
      }
  }
}

object AtomicBuilder extends Implicits.Level3