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/* __ *\
** ________ ___ / / ___ 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]
}
}
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