geotrellis.engine.logic.Collect.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")
case class CollectMap[K, V](map: Op[Map[K, Op[V]]]) extends Op[Map[K, V]] {
  def _run() = runAsync(List('init, map))
  val nextSteps: Steps[Map[K, V]] = {
    case 'init :: (m: Map[_, _]) :: Nil =>
      val opMap = m.asInstanceOf[Map[K, Op[V]]]
      val l: List[Op[(K, V)]] = opMap.map { case (k, v) => v.map((k, _)) }.toList
      runAsync('eval :: l)
    case 'eval :: (l: List[_]) => Result(l.asInstanceOf[List[(K, V)]].toMap)
    case _ => throw new Exception("unexpected stepresult")
  }
}

@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
object Collect {
  def apply[K, V](m: Op[Map[K, Op[V]]]): CollectMap[K, V] =
    CollectMap(m)
}

/**
 * Takes a sequence of operations, and returns a Sequence of the results of those operations.
 */
@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
case class Collect[A](ops: Op[Seq[Op[A]]]) extends Op[Seq[A]] {
  def _run() = runAsync(List('init, ops))
  val nextSteps: Steps[Seq[A]] = {
    case 'init :: (opSeq: Seq[_]) :: Nil => runAsync('eval :: opSeq.toList)
    case 'eval :: (as: List[_]) => Result(as.asInstanceOf[List[A]].toSeq)
    case _ => throw new Exception("unexpected stepresult")
  }
}

@deprecated("geotrellis-engine has been deprecated", "Geotrellis Version 0.10")
object CollectArray {
  @deprecated("Use Collect.", "0.9")
  def apply[A: Manifest](ops: Array[Op[A]]): Op[Array[A]] = Collect(Literal(ops.toSeq)).map( _.toArray )
}