geotrellis.engine.logic.MapOp.scala Maven / Gradle / Ivy

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GeoTrellis is an open source geographic data processing engine for high performance applications.

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/*
 * Copyright (c) 2014 Azavea.
 *
 * 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 geotrellis.engine.logic

import geotrellis.engine._

@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
object MapOp {
  /**
   * Invoke a function that takes no arguments.
   *
   * See MapOp0.
   */
  def apply[Z](call:() => Z) = MapOp0(call)

  /**
   * Invoke a function that takes one argument.
   *
   * See MapOp1.
   */
  def apply[A,Z](a:Op[A])(call:A => Z) = MapOp1(a)(call)

  /**
   * Invoke a function that takes two arguments.
   *
   * See MapOp2.
   */
  def apply[A,B,Z](a:Op[A], b:Op[B])(call:(A,B) => Z) =
    MapOp2(a,b)(call)
}

/**
 * Invoke a function that takes no arguments.
 */
@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
case class MapOp0[Z](call:() => Z) extends Op[Z] {
  def _run() = Result(call())
  val nextSteps:Steps[Z] = {
    case _ => sys.error("Should not be called.")
  }
}

/**
 * Invoke a function that takes one argument.
 *
 * Functionally speaking: MapOp an Op[A] into an Op[Z]
 * using a function from A => Z.
 */
@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
case class MapOp1[A, Z](a:Op[A])(call:A => Z) extends Op[Z] {
  def _run() = runAsync(a :: Nil)
  val nextSteps:Steps[Z] = {
    case a :: Nil => Result(call(a.asInstanceOf[A]))
  }
}

/**
 * Invoke a function that takes two arguments.
 *
 * Functionally speaking: MapOp an Op[A] and Op[B] into an Op[Z] using a
 * function from (A,B) => Z.
 */
@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
case class MapOp2[A, B, Z]
(a:Op[A], b:Op[B])(call:(A,B) => Z) extends Op[Z] {
  def _run() = runAsync(a :: b :: Nil)
  val nextSteps:Steps[Z] = {
    case a :: b :: Nil => Result(call(a.asInstanceOf[A],
                                      b.asInstanceOf[B]))
  }
}