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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
** $Id$
\* */
package scala.collection.mutable;
/** This class can be used as an adaptor to create mutable maps from
* Java classes that implementat the <code>java.util.Map</code> interface.
*
* @author Matthias Zenger
* @version 1.0, 21/07/2003
*/
class JavaMapAdaptor[A, B](jmap: java.util.Map) extends Map[A, B] {
def size: Int = jmap.size();
def get(key: A): Option[B] =
if (jmap.containsKey(key)) Some(jmap.get(key).asInstanceOf[B]) else None;
override def isEmpty: Boolean = jmap.isEmpty();
override def apply(key: A): B = jmap.get(key).asInstanceOf[B];
override def contains(key: A): Boolean = jmap.containsKey(key);
override def isDefinedAt(key: A) = jmap.containsKey(key);
override def keys: Iterator[A] = new Iterator[A] {
val iter = jmap.keySet().iterator();
def hasNext = iter.hasNext();
def next = iter.next().asInstanceOf[A];
}
override def values: Iterator[B] = new Iterator[B] {
val iter = jmap.values().iterator();
def hasNext = iter.hasNext();
def next = iter.next().asInstanceOf[B];
}
def elements: Iterator[Pair[A, B]] = new Iterator[Pair[A, B]] {
val iter = jmap.keySet().iterator();
def hasNext = iter.hasNext();
def next = {
val key = iter.next().asInstanceOf[A];
Pair(key, apply(key))
}
}
def update(key: A, value: B): Unit = { val x = jmap.put(key, value); }
def -=(key: A): Unit = { val x = jmap.remove(key); }
override def clear: Unit = jmap.clear();
}
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