Add Stream.fromIterable

sdk/lib/async/stream.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // part of dart.async;
 
 // -------------------------------------------------------------------
 // Core Stream types
 // -------------------------------------------------------------------
 
 abstract class Stream<T> {
   Stream();
 
   factory Stream.fromFuture(Future<T> future) {
-    var controller = new StreamController<T>();
+    _StreamImpl<T> stream = new _MultiStreamImpl<T>();
     future.then((value) {
-        controller.add(value);
-        controller.close();
+        stream._add(value);
+        stream._close();
       },
       onError: (error) {
-        controller.signalError(error);
-        controller.close();
+        stream._signalError(error);
+        stream._close();
       });
-    return controller.stream;
+    return stream;
   }
 
   /**
+   * Creates a single-subscription stream that gets its data from [data].
+   */
+  factory Stream.fromIterable(Iterable<T> data) {
+    return new _IterableSingleStreamImpl<T>(data);
+  }
+
+  /**
    * Stream that outputs events from the [sources] in cyclic order.
    *
    * The merged streams are paused and resumed in order to ensure the proper
    * order of output events.
    */
   factory Stream.cyclic(Iterable<Stream> sources) {
     return new CyclicScheduleStream<T>(sources);
   }
 
  /**
@@ skipping 795 matching lines @@
     sink.signalError(error);
   }
 
   /**
    * Handle an incoming done event.
    */
   void handleDone(StreamSink<T> sink) {
     sink.close();
   }
 }