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1 // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2016, 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 import 'dart:async'; | 5 import 'dart:async'; |
6 | 6 |
7 import 'null_stream_sink.dart'; | 7 import 'null_stream_sink.dart'; |
8 | 8 |
9 /// A [sink] where the destination is provided later. | 9 /// A [sink] where the destination is provided later. |
10 /// | 10 /// |
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29 /// Returns [sink] typed as a [_CompleterSink]. | 29 /// Returns [sink] typed as a [_CompleterSink]. |
30 _CompleterSink<T> get _sink => sink; | 30 _CompleterSink<T> get _sink => sink; |
31 | 31 |
32 /// Convert a `Future<StreamSink>` to a `StreamSink`. | 32 /// Convert a `Future<StreamSink>` to a `StreamSink`. |
33 /// | 33 /// |
34 /// This creates a sink using a sink completer, and sets the destination sink | 34 /// This creates a sink using a sink completer, and sets the destination sink |
35 /// to the result of the future when the future completes. | 35 /// to the result of the future when the future completes. |
36 /// | 36 /// |
37 /// If the future completes with an error, the returned sink will instead | 37 /// If the future completes with an error, the returned sink will instead |
38 /// be closed. Its [Sink.done] future will contain the error. | 38 /// be closed. Its [Sink.done] future will contain the error. |
39 static StreamSink fromFuture(Future<StreamSink> sinkFuture) { | 39 static StreamSink/*<T>*/ fromFuture/*<T>*/( |
40 var completer = new StreamSinkCompleter(); | 40 Future<StreamSink/*<T>*/> sinkFuture) { |
| 41 var completer = new StreamSinkCompleter/*<T>*/(); |
41 sinkFuture.then(completer.setDestinationSink, | 42 sinkFuture.then(completer.setDestinationSink, |
42 onError: completer.setError); | 43 onError: completer.setError); |
43 return completer.sink; | 44 return completer.sink; |
44 } | 45 } |
45 | 46 |
46 /// Sets a sink as the destination for events from the [StreamSinkCompleter]'s | 47 /// Sets a sink as the destination for events from the [StreamSinkCompleter]'s |
47 /// [sink]. | 48 /// [sink]. |
48 /// | 49 /// |
49 /// The completer's [sink] will act exactly as [destinationSink]. | 50 /// The completer's [sink] will act exactly as [destinationSink]. |
50 /// | 51 /// |
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169 .catchError((_) {}); | 170 .catchError((_) {}); |
170 } | 171 } |
171 | 172 |
172 // If the user has already asked when the sink is done, connect the sink's | 173 // If the user has already asked when the sink is done, connect the sink's |
173 // done callback to that completer. | 174 // done callback to that completer. |
174 if (_doneCompleter != null) { | 175 if (_doneCompleter != null) { |
175 _doneCompleter.complete(sink.done); | 176 _doneCompleter.complete(sink.done); |
176 } | 177 } |
177 } | 178 } |
178 } | 179 } |
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