| // 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 an [EventSink]. |
| /// |
| /// Subclasses can override individual methods, or use this to expose only the |
| /// [EventSink] methods of a subclass. |
| class DelegatingEventSink<T> implements EventSink<T> { |
| final EventSink _sink; |
| |
| /// Create a delegating sink forwarding calls to [sink]. |
| DelegatingEventSink(EventSink sink) : _sink = sink; |
| |
| void add(T data) { |
| _sink.add(data); |
| } |
| |
| void addError(error, [StackTrace stackTrace]) { |
| _sink.addError(error, stackTrace); |
| } |
| |
| void close() { |
| _sink.close(); |
| } |
| } |