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Standard library for the Scala Programming Language
/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection.parallel.mutable
import scala.collection.generic._
import scala.collection.parallel.Combiner
/** A template trait for mutable parallel maps.
*
* $sideeffects
*
* @tparam K the key type of the map
* @tparam V the value type of the map
*
* @author Aleksandar Prokopec
* @since 2.9
*/
trait ParMap[K, V]
extends scala.collection/*.mutable*/.GenMap[K, V]
with scala.collection.parallel.ParMap[K, V]
with /* mutable */ ParIterable[(K, V)]
with GenericParMapTemplate[K, V, ParMap]
with /* mutable */ ParMapLike[K, V, ParMap[K, V], scala.collection.mutable.Map[K, V]]
{
protected[this] override def newCombiner: Combiner[(K, V), ParMap[K, V]] = ParMap.newCombiner[K, V]
override def mapCompanion: GenericParMapCompanion[ParMap] = ParMap
override def empty: ParMap[K, V] = new ParHashMap[K, V]
def seq: scala.collection.mutable.Map[K, V]
override def updated [U >: V](key: K, value: U): ParMap[K, U] = this + ((key, value))
/** The same map with a given default function.
* Note: `get`, `contains`, `iterator`, `keys`, etc are not affected by `withDefault`.
*
* Invoking transformer methods (e.g. `map`) will not preserve the default value.
*
* @param d the function mapping keys to values, used for non-present keys
* @return a wrapper of the map with a default value
*/
def withDefault(d: K => V): scala.collection.parallel.mutable.ParMap[K, V] = new ParMap.WithDefault[K, V](this, d)
/** The same map with a given default value.
*
* Invoking transformer methods (e.g. `map`) will not preserve the default value.
*
* @param d the function mapping keys to values, used for non-present keys
* @return a wrapper of the map with a default value
*/
def withDefaultValue(d: V): scala.collection.parallel.mutable.ParMap[K, V] = new ParMap.WithDefault[K, V](this, x => d)
}
object ParMap extends ParMapFactory[ParMap] {
def empty[K, V]: ParMap[K, V] = new ParHashMap[K, V]
def newCombiner[K, V]: Combiner[(K, V), ParMap[K, V]] = ParHashMapCombiner.apply[K, V]
implicit def canBuildFrom[K, V]: CanCombineFrom[Coll, (K, V), ParMap[K, V]] = new CanCombineFromMap[K, V]
class WithDefault[K, V](underlying: ParMap[K, V], d: K => V)
extends scala.collection.parallel.ParMap.WithDefault(underlying, d) with ParMap[K, V] {
override def += (kv: (K, V)) = {underlying += kv; this}
def -= (key: K) = {underlying -= key; this}
override def empty = new WithDefault(underlying.empty, d)
override def updated[U >: V](key: K, value: U): WithDefault[K, U] = new WithDefault[K, U](underlying.updated[U](key, value), d)
override def + [U >: V](kv: (K, U)): WithDefault[K, U] = updated(kv._1, kv._2)
override def - (key: K): WithDefault[K, V] = new WithDefault(underlying - key, d)
override def seq = underlying.seq.withDefault(d)
def clear() = underlying.clear()
def put(key: K, value: V): Option[V] = underlying.put(key, value)
/** If these methods aren't overridden to thread through the underlying map,
* successive calls to withDefault* have no effect.
*/
override def withDefault(d: K => V): ParMap[K, V] = new WithDefault[K, V](underlying, d)
override def withDefaultValue(d: V): ParMap[K, V] = new WithDefault[K, V](underlying, x => d)
}
}