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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2006-2007, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
// $Id$
package scala.collection.jcl;
/** A wrapper around a Java collection that only supports remove mutations.
*
* @author Sean McDirmid
*/
trait IterableWrapper[A] extends MutableIterable[A] {
def underlying: java.util.Collection;
override def remove(a: A) = underlying.remove(a);
override def removeAll(that: Iterable[A]) = that match {
case that: IterableWrapper[_] => underlying.removeAll(that.underlying);
case _ => super.removeAll(that);
}
override def retainAll(that : Iterable[A]) = that match {
case that : IterableWrapper[_] => underlying.retainAll(that.underlying);
case _ => super.retainAll(that);
}
override def size = underlying.size;
override def isEmpty = underlying.isEmpty;
override def clear = underlying.clear;
override def elements : MutableIterator[A] = new IteratorWrapper(underlying.iterator);
class IteratorWrapper(underlying : java.util.Iterator) extends MutableIterator[A] {
// val underlying = IterableWrapper.this.underlying.iterator;
def hasNext = underlying.hasNext;
def next = underlying.next.asInstanceOf[A];
def remove = underlying.remove;
}
}
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