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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 library async.delegate.event_sink; | |
6 | |
7 import 'dart:async'; | 5 import 'dart:async'; |
8 | 6 |
9 /// Simple delegating wrapper around an [EventSink]. | 7 /// Simple delegating wrapper around an [EventSink]. |
10 /// | 8 /// |
11 /// Subclasses can override individual methods, or use this to expose only the | 9 /// Subclasses can override individual methods, or use this to expose only the |
12 /// [EventSink] methods of a subclass. | 10 /// [EventSink] methods of a subclass. |
13 class DelegatingEventSink<T> implements EventSink<T> { | 11 class DelegatingEventSink<T> implements EventSink<T> { |
14 final EventSink _sink; | 12 final EventSink _sink; |
15 | 13 |
16 /// Create a delegating sink forwarding calls to [sink]. | 14 /// Create a delegating sink forwarding calls to [sink]. |
17 DelegatingEventSink(EventSink sink) : _sink = sink; | 15 DelegatingEventSink(EventSink sink) : _sink = sink; |
18 | 16 |
19 void add(T data) { | 17 void add(T data) { |
20 _sink.add(data); | 18 _sink.add(data); |
21 } | 19 } |
22 | 20 |
23 void addError(error, [StackTrace stackTrace]) { | 21 void addError(error, [StackTrace stackTrace]) { |
24 _sink.addError(error, stackTrace); | 22 _sink.addError(error, stackTrace); |
25 } | 23 } |
26 | 24 |
27 void close() { | 25 void close() { |
28 _sink.close(); | 26 _sink.close(); |
29 } | 27 } |
30 } | 28 } |
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