| // 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. |
| |
| library async.delegate.stream_sink; |
| |
| import 'dart:async'; |
| |
| /// Simple delegating wrapper around a [StreamSink]. |
| /// |
| /// Subclasses can override individual methods, or use this to expose only the |
| /// [StreamSink] methods of a subclass. |
| class DelegatingStreamSink<T> implements StreamSink<T> { |
| final StreamSink _sink; |
| |
| Future get done => _sink.done; |
| |
| /// Create delegating sink forwarding calls to [sink]. |
| DelegatingStreamSink(StreamSink sink) |
| : _sink = sink; |
| |
| void add(T data) { |
| _sink.add(data); |
| } |
| |
| void addError(error, [StackTrace stackTrace]) { |
| _sink.addError(error, stackTrace); |
| } |
| |
| Future addStream(Stream<T> stream) => _sink.addStream(stream); |
| |
| Future close() => _sink.close(); |
| } |