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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2006-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://www.scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala
package collection
package convert
import java.{ lang => jl, util => ju }, java.util.{ concurrent => juc }
import scala.language.implicitConversions
trait WrapAsScala {
import Wrappers._
/**
* Implicitly converts a Java `Iterator` to a Scala `Iterator`.
*
* The returned Scala `Iterator` is backed by the provided Java `Iterator`
* and any side-effects of using it via the Scala interface will be visible
* via the Java interface and vice versa.
*
* If the Java `Iterator` was previously obtained from an implicit or
* explicit call of `asIterator(scala.collection.Iterator)` then the
* original Scala `Iterator` will be returned.
*
* @param it The `Iterator` to be converted.
* @return A Scala `Iterator` view of the argument.
*/
implicit def asScalaIterator[A](it: ju.Iterator[A]): Iterator[A] = it match {
case IteratorWrapper(wrapped) => wrapped
case _ => JIteratorWrapper(it)
}
/**
* Implicitly converts a Java Enumeration to a Scala Iterator.
* The returned Scala Iterator is backed by the provided Java
* Enumeration and any side-effects of using it via the Scala interface will
* be visible via the Java interface and vice versa.
*
* If the Java Enumeration was previously obtained from an implicit or
* explicit call of `enumerationAsScalaIterator(scala.collection.Iterator)`
* then the original Scala Iterator will be returned.
*
* @param i The Enumeration to be converted.
* @return A Scala Iterator view of the argument.
*/
implicit def enumerationAsScalaIterator[A](i: ju.Enumeration[A]): Iterator[A] = i match {
case IteratorWrapper(wrapped) => wrapped
case _ => JEnumerationWrapper(i)
}
/**
* Implicitly converts a Java `Iterable` to a Scala `Iterable`.
*
* The returned Scala `Iterable` is backed by the provided Java `Iterable`
* and any side-effects of using it via the Scala interface will be visible
* via the Java interface and vice versa.
*
* If the Java `Iterable` was previously obtained from an implicit or
* explicit call of `iterableAsScalaIterable(scala.collection.Iterable)`
* then the original Scala Iterable will be returned.
*
* @param i The Iterable to be converted.
* @return A Scala Iterable view of the argument.
*/
implicit def iterableAsScalaIterable[A](i: jl.Iterable[A]): Iterable[A] = i match {
case IterableWrapper(wrapped) => wrapped
case _ => JIterableWrapper(i)
}
/**
* Implicitly converts a Java `Collection` to an Scala `Iterable`.
*
* If the Java `Collection` was previously obtained from an implicit or
* explicit call of `collectionAsScalaIterable(scala.collection.SizedIterable)`
* then the original Scala `Iterable` will be returned.
*
* @param i The Collection to be converted.
* @return A Scala Iterable view of the argument.
*/
implicit def collectionAsScalaIterable[A](i: ju.Collection[A]): Iterable[A] = i match {
case IterableWrapper(wrapped) => wrapped
case _ => JCollectionWrapper(i)
}
/**
* Implicitly converts a Java `List` to a Scala mutable `Buffer`.
*
* The returned Scala `Buffer` is backed by the provided Java `List`
* and any side-effects of using it via the Scala interface will
* be visible via the Java interface and vice versa.
*
* If the Java `List` was previously obtained from an implicit or
* explicit call of `asScalaBuffer(scala.collection.mutable.Buffer)`
* then the original Scala `Buffer` will be returned.
*
* @param l The `List` to be converted.
* @return A Scala mutable `Buffer` view of the argument.
*/
implicit def asScalaBuffer[A](l: ju.List[A]): mutable.Buffer[A] = l match {
case MutableBufferWrapper(wrapped) => wrapped
case _ =>new JListWrapper(l)
}
/**
* Implicitly converts a Java Set to a Scala mutable Set.
* The returned Scala Set is backed by the provided Java
* Set and any side-effects of using it via the Scala interface will
* be visible via the Java interface and vice versa.
*
* If the Java Set was previously obtained from an implicit or
* explicit call of `asScalaSet(scala.collection.mutable.Set)` then
* the original Scala Set will be returned.
*
* @param s The Set to be converted.
* @return A Scala mutable Set view of the argument.
*/
implicit def asScalaSet[A](s: ju.Set[A]): mutable.Set[A] = s match {
case MutableSetWrapper(wrapped) => wrapped
case _ =>new JSetWrapper(s)
}
/**
* Implicitly converts a Java `Map` to a Scala mutable `Map`.
*
* The returned Scala `Map` is backed by the provided Java `Map` and any
* side-effects of using it via the Scala interface will be visible via
* the Java interface and vice versa.
*
* If the Java `Map` was previously obtained from an implicit or
* explicit call of `mapAsScalaMap(scala.collection.mutable.Map)` then
* the original Scala Map will be returned.
*
* If the wrapped map is synchronized (e.g. from `java.util.Collections.synchronizedMap`),
* it is your responsibility to wrap all
* non-atomic operations with `underlying.synchronized`.
* This includes `get`, as `java.util.Map`'s API does not allow for an
* atomic `get` when `null` values may be present.
*
* @param m The Map to be converted.
* @return A Scala mutable Map view of the argument.
*/
implicit def mapAsScalaMap[A, B](m: ju.Map[A, B]): mutable.Map[A, B] = m match {
//case ConcurrentMapWrapper(wrapped) => wrapped
case MutableMapWrapper(wrapped) => wrapped
case _ => new JMapWrapper(m)
}
/**
* Implicitly converts a Java ConcurrentMap to a Scala mutable ConcurrentMap.
* The returned Scala ConcurrentMap is backed by the provided Java
* ConcurrentMap and any side-effects of using it via the Scala interface will
* be visible via the Java interface and vice versa.
*
* If the Java ConcurrentMap was previously obtained from an implicit or
* explicit call of `asConcurrentMap(scala.collection.mutable.ConcurrentMap)`
* then the original Scala ConcurrentMap will be returned.
*
* @param m The ConcurrentMap to be converted.
* @return A Scala mutable ConcurrentMap view of the argument.
*/
implicit def mapAsScalaConcurrentMap[A, B](m: juc.ConcurrentMap[A, B]): concurrent.Map[A, B] = m match {
case cmw: ConcurrentMapWrapper[a, b] => cmw.underlying
case _ => new JConcurrentMapWrapper(m)
}
/**
* Implicitly converts a Java `Dictionary` to a Scala mutable
* `Map[String, String]`.
*
* The returned Scala `Map[String, String]` is backed by the provided Java
* `Dictionary` and any side-effects of using it via the Scala interface
* will be visible via the Java interface and vice versa.
*
* @param p The Dictionary to be converted.
* @return A Scala mutable Map[String, String] view of the argument.
*/
implicit def dictionaryAsScalaMap[A, B](p: ju.Dictionary[A, B]): mutable.Map[A, B] = p match {
case DictionaryWrapper(wrapped) => wrapped
case _ => new JDictionaryWrapper(p)
}
/**
* Implicitly converts a Java `Properties` to a Scala `mutable Map[String, String]`.
*
* The returned Scala `Map[String, String]` is backed by the provided Java
* `Properties` and any side-effects of using it via the Scala interface
* will be visible via the Java interface and vice versa.
*
* @param p The Properties to be converted.
* @return A Scala mutable Map[String, String] view of the argument.
*/
implicit def propertiesAsScalaMap(p: ju.Properties): mutable.Map[String, String] = p match {
case _ => new JPropertiesWrapper(p)
}
}
object WrapAsScala extends WrapAsScala { }
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