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+/* __ *\
+** ________ ___ / / ___ Scala API **
+** / __/ __// _ | / / / _ | (c) 2006-2016, LAMP/EPFL **
+** __\ \/ /__/ __ |/ /__/ __ | http://www.scala-lang.org/ **
+** /____/\___/_/ |_/____/_/ | | **
+** |/ **
+\* */
+
+package scala
+package collection
+package convert
+
+import java.{ lang => jl, util => ju }, java.util.{ concurrent => juc }
+
+/** Defines converter methods from Scala to Java collections. */
+trait AsJavaConverters {
+ import Wrappers._
+
+ /**
+ * Converts a Scala `Iterator` to a Java `Iterator`.
+ *
+ * The returned Java `Iterator` is backed by the provided Scala `Iterator` and any side-effects of
+ * using it via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Iterator` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.asScalaIterator]](java.util.Iterator)` then the original Java `Iterator` will
+ * be returned.
+ *
+ * @param i The Scala `Iterator` to be converted.
+ * @return A Java `Iterator` view of the argument.
+ */
+ def asJavaIterator[A](i: Iterator[A]): ju.Iterator[A] = i match {
+ case null => null
+ case JIteratorWrapper(wrapped) => wrapped.asInstanceOf[ju.Iterator[A]]
+ case _ => IteratorWrapper(i)
+ }
+
+ /**
+ * Converts a Scala `Iterator` to a Java `Enumeration`.
+ *
+ * The returned Java `Enumeration` is backed by the provided Scala `Iterator` and any side-effects
+ * of using it via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Iterator` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.enumerationAsScalaIterator]](java.util.Enumeration)` then the original Java
+ * `Enumeration` will be returned.
+ *
+ * @param i The Scala `Iterator` to be converted.
+ * @return A Java `Enumeration` view of the argument.
+ */
+ def asJavaEnumeration[A](i: Iterator[A]): ju.Enumeration[A] = i match {
+ case null => null
+ case JEnumerationWrapper(wrapped) => wrapped.asInstanceOf[ju.Enumeration[A]]
+ case _ => IteratorWrapper(i)
+ }
+
+ /**
+ * Converts a Scala `Iterable` to a Java `Iterable`.
+ *
+ * The returned Java `Iterable` is backed by the provided Scala `Iterable` and any side-effects of
+ * using it via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Iterable` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.iterableAsScalaIterable]](java.lang.Iterable)` then the original Java
+ * `Iterable` will be returned.
+ *
+ * @param i The Scala `Iterable` to be converted.
+ * @return A Java `Iterable` view of the argument.
+ */
+ def asJavaIterable[A](i: Iterable[A]): jl.Iterable[A] = i match {
+ case null => null
+ case JIterableWrapper(wrapped) => wrapped.asInstanceOf[jl.Iterable[A]]
+ case _ => IterableWrapper(i)
+ }
+
+ /**
+ * Converts a Scala `Iterable` to an immutable Java `Collection`.
+ *
+ * If the Scala `Iterable` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.collectionAsScalaIterable]](java.util.Collection)` then the original Java
+ * `Collection` will be returned.
+ *
+ * @param i The Scala `Iterable` to be converted.
+ * @return A Java `Collection` view of the argument.
+ */
+ def asJavaCollection[A](i: Iterable[A]): ju.Collection[A] = i match {
+ case null => null
+ case JCollectionWrapper(wrapped) => wrapped.asInstanceOf[ju.Collection[A]]
+ case _ => new IterableWrapper(i)
+ }
+
+ /**
+ * Converts a Scala mutable `Buffer` to a Java List.
+ *
+ * The returned Java List is backed by the provided Scala `Buffer` and any side-effects of using
+ * it via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Buffer` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.asScalaBuffer]](java.util.List)` then the original Java `List` will be
+ * returned.
+ *
+ * @param b The Scala `Buffer` to be converted.
+ * @return A Java `List` view of the argument.
+ */
+ def bufferAsJavaList[A](b: mutable.Buffer[A]): ju.List[A] = b match {
+ case null => null
+ case JListWrapper(wrapped) => wrapped
+ case _ => new MutableBufferWrapper(b)
+ }
+
+ /**
+ * Converts a Scala mutable `Seq` to a Java `List`.
+ *
+ * The returned Java `List` is backed by the provided Scala `Seq` and any side-effects of using it
+ * via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Seq` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.asScalaBuffer]](java.util.List)` then the original Java `List` will be
+ * returned.
+ *
+ * @param s The Scala `Seq` to be converted.
+ * @return A Java `List` view of the argument.
+ */
+ def mutableSeqAsJavaList[A](s: mutable.Seq[A]): ju.List[A] = s match {
+ case null => null
+ case JListWrapper(wrapped) => wrapped
+ case _ => new MutableSeqWrapper(s)
+ }
+
+ /**
+ * Converts a Scala `Seq` to a Java `List`.
+ *
+ * The returned Java `List` is backed by the provided Scala `Seq` and any side-effects of using it
+ * via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Seq` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.asScalaBuffer]](java.util.List)` then the original Java `List` will be
+ * returned.
+ *
+ * @param s The Scala `Seq` to be converted.
+ * @return A Java `List` view of the argument.
+ */
+ def seqAsJavaList[A](s: Seq[A]): ju.List[A] = s match {
+ case null => null
+ case JListWrapper(wrapped) => wrapped.asInstanceOf[ju.List[A]]
+ case _ => new SeqWrapper(s)
+ }
+
+ /**
+ * Converts a Scala mutable `Set` to a Java `Set`.
+ *
+ * The returned Java `Set` is backed by the provided Scala `Set` and any side-effects of using it
+ * via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Set` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.asScalaSet]](java.util.Set)` then the original Java `Set` will be returned.
+ *
+ * @param s The Scala mutable `Set` to be converted.
+ * @return A Java `Set` view of the argument.
+ */
+ def mutableSetAsJavaSet[A](s: mutable.Set[A]): ju.Set[A] = s match {
+ case null => null
+ case JSetWrapper(wrapped) => wrapped
+ case _ => new MutableSetWrapper(s)
+ }
+
+ /**
+ * Converts a Scala `Set` to a Java `Set`.
+ *
+ * The returned Java `Set` is backed by the provided Scala `Set` and any side-effects of using it
+ * via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Set` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.asScalaSet]](java.util.Set)` then the original Java `Set` will be returned.
+ *
+ * @param s The Scala `Set` to be converted.
+ * @return A Java `Set` view of the argument.
+ */
+ def setAsJavaSet[A](s: Set[A]): ju.Set[A] = s match {
+ case null => null
+ case JSetWrapper(wrapped) => wrapped
+ case _ => new SetWrapper(s)
+ }
+
+ /**
+ * Converts a Scala mutable `Map` to a Java `Map`.
+ *
+ * The returned Java `Map` is backed by the provided Scala `Map` and any side-effects of using it
+ * via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Map` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.mapAsScalaMap]](java.util.Map)` then the original Java `Map` will be
+ * returned.
+ *
+ * @param m The Scala mutable `Map` to be converted.
+ * @return A Java `Map` view of the argument.
+ */
+ def mutableMapAsJavaMap[A, B](m: mutable.Map[A, B]): ju.Map[A, B] = m match {
+ case null => null
+ case JMapWrapper(wrapped) => wrapped
+ case _ => new MutableMapWrapper(m)
+ }
+
+ /**
+ * Converts a Scala mutable `Map` to a Java `Dictionary`.
+ *
+ * The returned Java `Dictionary` is backed by the provided Scala `Dictionary` and any
+ * side-effects of using it via the Java interface will be visible via the Scala interface and
+ * vice versa.
+ *
+ * If the Scala `Dictionary` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.dictionaryAsScalaMap]](java.util.Dictionary)` then the original Java
+ * `Dictionary` will be returned.
+ *
+ * @param m The Scala `Map` to be converted.
+ * @return A Java `Dictionary` view of the argument.
+ */
+ def asJavaDictionary[A, B](m: mutable.Map[A, B]): ju.Dictionary[A, B] = m match {
+ case null => null
+ case JDictionaryWrapper(wrapped) => wrapped
+ case _ => new DictionaryWrapper(m)
+ }
+
+ /**
+ * Converts a Scala `Map` to a Java `Map`.
+ *
+ * The returned Java `Map` is backed by the provided Scala `Map` and any side-effects of using it
+ * via the Java interface will be visible via the Scala interface and vice versa.
+ *
+ * If the Scala `Map` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.mapAsScalaMap]](java.util.Map)` then the original Java `Map` will be
+ * returned.
+ *
+ * @param m The Scala `Map` to be converted.
+ * @return A Java `Map` view of the argument.
+ */
+ def mapAsJavaMap[A, B](m: Map[A, B]): ju.Map[A, B] = m match {
+ case null => null
+ case JMapWrapper(wrapped) => wrapped.asInstanceOf[ju.Map[A, B]]
+ case _ => new MapWrapper(m)
+ }
+
+ /**
+ * Converts a Scala mutable `concurrent.Map` to a Java `ConcurrentMap`.
+ *
+ * The returned Java `ConcurrentMap` is backed by the provided Scala `concurrent.Map` and any
+ * side-effects of using it via the Java interface will be visible via the Scala interface and
+ * vice versa.
+ *
+ * If the Scala `concurrent.Map` was previously obtained from an implicit or explicit call of
+ * `[[JavaConverters.mapAsScalaConcurrentMap]](java.util.concurrent.ConcurrentMap)` then the
+ * original Java `ConcurrentMap` will be returned.
+ *
+ * @param m The Scala `concurrent.Map` to be converted.
+ * @return A Java `ConcurrentMap` view of the argument.
+ */
+ def mapAsJavaConcurrentMap[A, B](m: concurrent.Map[A, B]): juc.ConcurrentMap[A, B] = m match {
+ case null => null
+ case JConcurrentMapWrapper(wrapped) => wrapped
+ case _ => new ConcurrentMapWrapper(m)
+ }
+}