cron4s.expr.FieldExpr.scala Maven / Gradle / Ivy

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CRON expression parser for Scala

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/*
 * Copyright 2017 Antonio Alonso Dominguez
 *
 * 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 cron4s.expr

import cron4s.{CronField, CronUnit}
import cron4s.base.{Enumerated, Predicate}

/**
  * Created by alonsodomin on 25/08/2016.
  */
trait FieldExpr[E[_ <: CronField], F <: CronField] extends Enumerated[E[F]] {

  def matches(e: E[F]): Predicate[Int]

  def implies[EE[_ <: CronField]](e: E[F])(ee: EE[F])(implicit EE: FieldExpr[EE, F]): Boolean

  final def impliedBy[EE[_ <: CronField]](e: E[F])(ee: EE[F])(
      implicit EE: FieldExpr[EE, F]
    ): Boolean =
      EE.implies(ee)(e)(this)

  def unit(e: E[F]): CronUnit[F]

}

object FieldExpr {
  @inline def apply[E[_ <: CronField], F <: CronField](implicit ev: FieldExpr[E, F]): FieldExpr[E, F] = ev
}