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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.stream_sink; | |
6 | |
7 import 'dart:async'; | 5 import 'dart:async'; |
8 | 6 |
9 /// Simple delegating wrapper around a [StreamSink]. | 7 /// Simple delegating wrapper around a [StreamSink]. |
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 /// [StreamSink] methods of a subclass. | 10 /// [StreamSink] methods of a subclass. |
13 class DelegatingStreamSink<T> implements StreamSink<T> { | 11 class DelegatingStreamSink<T> implements StreamSink<T> { |
14 final StreamSink _sink; | 12 final StreamSink _sink; |
15 | 13 |
16 Future get done => _sink.done; | 14 Future get done => _sink.done; |
17 | 15 |
18 /// Create delegating sink forwarding calls to [sink]. | 16 /// Create delegating sink forwarding calls to [sink]. |
19 DelegatingStreamSink(StreamSink sink) | 17 DelegatingStreamSink(StreamSink sink) |
20 : _sink = sink; | 18 : _sink = sink; |
21 | 19 |
22 void add(T data) { | 20 void add(T data) { |
23 _sink.add(data); | 21 _sink.add(data); |
24 } | 22 } |
25 | 23 |
26 void addError(error, [StackTrace stackTrace]) { | 24 void addError(error, [StackTrace stackTrace]) { |
27 _sink.addError(error, stackTrace); | 25 _sink.addError(error, stackTrace); |
28 } | 26 } |
29 | 27 |
30 Future addStream(Stream<T> stream) => _sink.addStream(stream); | 28 Future addStream(Stream<T> stream) => _sink.addStream(stream); |
31 | 29 |
32 Future close() => _sink.close(); | 30 Future close() => _sink.close(); |
33 } | 31 } |
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