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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 import 'dart:async'; | 5 import 'dart:async'; |
6 | 6 |
7 import 'future_group.dart'; | 7 import 'future_group.dart'; |
8 import 'result.dart'; | 8 import 'result.dart'; |
9 | 9 |
10 /// A class that splits a single source stream into an arbitrary number of | 10 /// A class that splits a single source stream into an arbitrary number of |
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50 /// Whether [_stream] is done emitting events. | 50 /// Whether [_stream] is done emitting events. |
51 var _isDone = false; | 51 var _isDone = false; |
52 | 52 |
53 /// Whether [close] has been called. | 53 /// Whether [close] has been called. |
54 var _isClosed = false; | 54 var _isClosed = false; |
55 | 55 |
56 /// Splits [stream] into [count] identical streams. | 56 /// Splits [stream] into [count] identical streams. |
57 /// | 57 /// |
58 /// [count] defaults to 2. This is the same as creating [count] branches and | 58 /// [count] defaults to 2. This is the same as creating [count] branches and |
59 /// then closing the [StreamSplitter]. | 59 /// then closing the [StreamSplitter]. |
60 static List<Stream/*<T>*/> splitFrom/*<T>*/(Stream/*<T>*/ stream, | 60 static List<Stream<T>> splitFrom<T>(Stream<T> stream, |
61 [int count]) { | 61 [int count]) { |
62 if (count == null) count = 2; | 62 if (count == null) count = 2; |
63 var splitter = new StreamSplitter/*<T>*/(stream); | 63 var splitter = new StreamSplitter<T>(stream); |
64 var streams = new List<Stream>.generate(count, (_) => splitter.split()); | 64 var streams = new List<Stream>.generate(count, (_) => splitter.split()); |
65 splitter.close(); | 65 splitter.close(); |
66 return streams; | 66 return streams; |
67 } | 67 } |
68 | 68 |
69 StreamSplitter(this._stream); | 69 StreamSplitter(this._stream); |
70 | 70 |
71 /// Returns a single-subscription stream that's a copy of the input stream. | 71 /// Returns a single-subscription stream that's a copy of the input stream. |
72 /// | 72 /// |
73 /// This will throw a [StateError] if [close] has been called. | 73 /// This will throw a [StateError] if [close] has been called. |
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201 } | 201 } |
202 | 202 |
203 /// Marks [_controllers] as done. | 203 /// Marks [_controllers] as done. |
204 void _onDone() { | 204 void _onDone() { |
205 _isDone = true; | 205 _isDone = true; |
206 for (var controller in _controllers) { | 206 for (var controller in _controllers) { |
207 _closeGroup.add(controller.close()); | 207 _closeGroup.add(controller.close()); |
208 } | 208 } |
209 } | 209 } |
210 } | 210 } |
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