| // Copyright (c) 2015, 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. |
| |
| import 'dart:async'; |
| |
| /// Simple delegating wrapper around a [StreamSubscription]. |
| /// |
| /// Subclasses can override individual methods. |
| class DelegatingStreamSubscription<T> implements StreamSubscription<T> { |
| final StreamSubscription _source; |
| |
| /// Create delegating subscription forwarding calls to [sourceSubscription]. |
| DelegatingStreamSubscription(StreamSubscription sourceSubscription) |
| : _source = sourceSubscription; |
| |
| void onData(void handleData(T data)) { |
| _source.onData(handleData); |
| } |
| |
| void onError(Function handleError) { |
| _source.onError(handleError); |
| } |
| |
| void onDone(void handleDone()) { |
| _source.onDone(handleDone); |
| } |
| |
| void pause([Future resumeFuture]) { |
| _source.pause(resumeFuture); |
| } |
| |
| void resume() { |
| _source.resume(); |
| } |
| |
| Future cancel() => _source.cancel(); |
| |
| Future asFuture([futureValue]) => _source.asFuture(futureValue); |
| |
| bool get isPaused => _source.isPaused; |
| } |