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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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 part of dart.convert; | 5 part of dart.convert; |
6 | 6 |
7 /** | 7 /** |
8 * A [Converter] converts data from one representation into another. | 8 * A [Converter] converts data from one representation into another. |
9 * | 9 * |
10 * *Converters are still experimental and are subject to change without notice.* | 10 * *Converters are still experimental and are subject to change without notice.* |
11 * | 11 * |
12 */ | 12 */ |
13 abstract class Converter<S, T> { | 13 abstract class Converter<S, T> { |
14 /** | 14 /** |
15 * Converts [input] and returns the result of the conversion. | 15 * Converts [input] and returns the result of the conversion. |
16 */ | 16 */ |
17 T convert(S input); | 17 T convert(S input); |
18 | 18 |
19 /** | 19 /** |
20 * Fuses `this` with [other]. | 20 * Fuses `this` with [other]. |
21 * | 21 * |
22 * Encoding with the resulting converter is equivalent to converting with | 22 * Encoding with the resulting converter is equivalent to converting with |
23 * `this` before converting with `other`. | 23 * `this` before converting with `other`. |
24 */ | 24 */ |
25 Converter<S, dynamic> fuse(Converter<T, dynamic> other) { | 25 Converter<S, dynamic> fuse(Converter<T, dynamic> other) { |
26 return new _FusedConverter<S, T, dynamic>(this, other); | 26 return new _FusedConverter<S, T, dynamic>(this, other); |
27 } | 27 } |
28 | |
29 /** | |
30 * Starts a chunked conversion. | |
31 * | |
32 * The returned [ChunkedConversionSink] supports the interface described by | |
33 * [inputInterface]. | |
34 * | |
35 * If the given [sink] supports the methods described by | |
36 * [outputInterface] then the chunked conversion can take advantage of | |
37 * the additional methods and provide a more efficient conversion. | |
38 * | |
39 * If [sink] does not support the [outputInterface] it is adapted. If | |
40 * necessary, the adapter buffers all chunks and invokes | |
41 * `addNonChunked` on [sink]. | |
42 */ | |
43 ChunkedConversionSink<S, dynamic> startChunkedConversion( | |
Søren Gjesse
2013/07/24 09:26:41
How about just calling this something shorter? May
floitsch
2013/07/24 18:31:15
I'm torn...
Will discuss with others to get a feel
| |
44 ChunkedConversionSink sink) { | |
45 return new _NonChunkedSink<S, T>(this, sink.adaptTo(outputInterface)); | |
46 } | |
47 | |
48 /** Defines the accepted input interface for chunked conversions. */ | |
49 ChunkedConversionInterface get inputInterface => | |
50 ChunkedConversionSink.INTERFACE; | |
51 /** Defines the accepted output interface for chunked conversions. */ | |
52 ChunkedConversionInterface get outputInterface => | |
53 ChunkedConversionSink.INTERFACE; | |
28 } | 54 } |
29 | 55 |
30 /** | 56 /** |
31 * Fuses two converters. | 57 * Fuses two converters. |
32 * | 58 * |
33 * For a non-chunked conversion converts the input in sequence. | 59 * For a non-chunked conversion converts the input in sequence. |
34 */ | 60 */ |
35 class _FusedConverter<S, M, T> extends Converter<S, T> { | 61 class _FusedConverter<S, M, T> extends Converter<S, T> { |
36 final Converter _first; | 62 final Converter _first; |
37 final Converter _second; | 63 final Converter _second; |
38 | 64 |
39 _FusedConverter(this._first, this._second); | 65 _FusedConverter(this._first, this._second); |
40 | 66 |
41 T convert(S input) => _second.convert(_first.convert(input)); | 67 T convert(S input) => _second.convert(_first.convert(input)); |
68 | |
69 ChunkedConversionSink<S, dynamic> startChunkedConversion( | |
70 ChunkedConversionSink sink) { | |
71 return _first.startChunkedConversion(_second.startChunkedConversion(sink)); | |
72 } | |
73 | |
74 ChunkedConversionInterface get inputInterface => _first.inputInterface; | |
75 ChunkedConversionInterface get outputInterface => _second.outputInterface; | |
42 } | 76 } |
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