alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Scala example source code file (ParMapFactory.scala)

This example Scala source code file (ParMapFactory.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

cancombinefrommap, cc, collection, genericparmapcompanion, k, mapcoll, mutable, parallel, parmap, parmapfactory, parmaplike, v, y

The ParMapFactory.scala Scala example source code

/*                     __                                               *\
**     ________ ___   / /  ___     Scala API                            **
**    / __/ __// _ | / /  / _ |    (c) 2010-2013, LAMP/EPFL             **
**  __\ \/ /__/ __ |/ /__/ __ |    http://scala-lang.org/               **
** /____/\___/_/ |_/____/_/ | |                                         **
**                          |/                                          **
\*                                                                      */

package scala
package collection
package generic

import scala.collection.parallel.ParMap
import scala.collection.parallel.ParMapLike
import scala.collection.parallel.Combiner
import scala.collection.mutable.Builder
import scala.language.higherKinds

/** A template class for companion objects of `ParMap` and subclasses thereof.
 *  This class extends `TraversableFactory` and provides a set of operations
 *  to create `$Coll` objects.
 *
 *  @define coll parallel map
 *  @define Coll `ParMap`
 *  @author Aleksandar Prokopec
 *  @since 2.8
 */
abstract class ParMapFactory[CC[X, Y] <: ParMap[X, Y] with ParMapLike[X, Y, CC[X, Y], _]]
extends GenMapFactory[CC]
   with GenericParMapCompanion[CC] {

  type MapColl = CC[_, _]

  /** The default builder for $Coll objects.
   *  @tparam K      the type of the keys
   *  @tparam V      the type of the associated values
   */
  override def newBuilder[K, V]: Builder[(K, V), CC[K, V]] = newCombiner[K, V]

  /** The default combiner for $Coll objects.
   *  @tparam K     the type of the keys
   *  @tparam V     the type of the associated values
   */
  def newCombiner[K, V]: Combiner[(K, V), CC[K, V]]

  class CanCombineFromMap[K, V] extends CanCombineFrom[CC[_, _], (K, V), CC[K, V]] {
    def apply(from: MapColl) = from.genericMapCombiner[K, V].asInstanceOf[Combiner[(K, V), CC[K, V]]]
    def apply() = newCombiner[K, V]
  }

}

Other Scala source code examples

Here is a short list of links related to this Scala ParMapFactory.scala source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.