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package scala.collection.generic
import scala.collection.parallel.ParallelMap
import scala.collection.parallel.ParallelMapLike
import scala.collection.parallel.Combiner
import scala.collection.mutable.Builder
/** A template class for companion objects of `ParallelMap` and subclasses thereof.
* This class extends `TraversableFactory` and provides a set of operations to create `$Coll` objects.
*
* @define $coll parallel map
* @define $Coll ParallelMap
*/
abstract class ParallelMapFactory[CC[X, Y] <: ParallelMap[X, Y] with ParallelMapLike[X, Y, CC[X, Y], _]]
extends MapFactory[CC]
with GenericParallelMapCompanion[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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