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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 * It is recommended that implementations of `Converter` extend this class, | 10 * It is recommended that implementations of `Converter` extend this class, |
11 * to inherit any further methods that may be added to the class. | 11 * to inherit any further methods that may be added to the class. |
12 */ | 12 */ |
13 abstract class Converter<S, T> implements StreamTransformer { | 13 abstract class Converter<S, T> implements StreamTransformer/*<S, T>*/ { |
14 const Converter(); | 14 const Converter(); |
15 | 15 |
16 /** | 16 /** |
17 * Converts [input] and returns the result of the conversion. | 17 * Converts [input] and returns the result of the conversion. |
18 */ | 18 */ |
19 T convert(S input); | 19 T convert(S input); |
20 | 20 |
21 /** | 21 /** |
22 * Fuses `this` with [other]. | 22 * Fuses `this` with [other]. |
23 * | 23 * |
24 * Encoding with the resulting converter is equivalent to converting with | 24 * Encoding with the resulting converter is equivalent to converting with |
25 * `this` before converting with `other`. | 25 * `this` before converting with `other`. |
26 */ | 26 */ |
27 Converter<S, dynamic> fuse(Converter<T, dynamic> other) { | 27 Converter<S, dynamic/*=TT*/> fuse/*<TT>*/( |
28 return new _FusedConverter<S, T, dynamic>(this, other); | 28 Converter<T, dynamic/*=TT*/> other) { |
| 29 return new _FusedConverter<S, T, dynamic/*=TT*/>(this, other); |
29 } | 30 } |
30 | 31 |
31 /** | 32 /** |
32 * Deprecated. | 33 * Starts a chunked conversion. |
33 * | 34 * |
34 * Use the [ChunkedConverter] interface instead. | 35 * The returned sink serves as input for the long-running conversion. The |
| 36 * given [sink] serves as output. |
35 */ | 37 */ |
36 @deprecated | 38 Sink/*<S>*/ startChunkedConversion(Sink/*<T>*/ sink) { |
37 ChunkedConversionSink startChunkedConversion(Sink sink) { | |
38 throw new UnsupportedError( | 39 throw new UnsupportedError( |
39 "This converter does not support chunked conversions: $this"); | 40 "This converter does not support chunked conversions: $this"); |
40 } | 41 } |
41 | 42 |
42 /** | 43 Stream/*<T>*/ bind(Stream/*<S>*/ stream) { |
43 * Deprecated. | 44 return new Stream/*<T>*/.eventTransformed( |
44 * | |
45 * Use the [ChunkedConverter] interface instead. | |
46 */ | |
47 @deprecated | |
48 Stream bind(Stream stream) { | |
49 return new Stream.eventTransformed( | |
50 stream, | 45 stream, |
51 (EventSink sink) => new _ConverterStreamEventSink(this, sink)); | 46 (EventSink sink) => new _ConverterStreamEventSink(this, sink)); |
52 } | 47 } |
53 } | 48 } |
54 | 49 |
55 /** | 50 /** |
56 * Fuses two converters. | 51 * Fuses two converters. |
57 * | 52 * |
58 * For a non-chunked conversion converts the input in sequence. | 53 * For a non-chunked conversion converts the input in sequence. |
59 */ | 54 */ |
60 class _FusedConverter<S, M, T> extends Converter<S, T> { | 55 class _FusedConverter<S, M, T> extends Converter<S, T> { |
61 final Converter<S, M> _first; | 56 final Converter<S, M> _first; |
62 final Converter<M, T> _second; | 57 final Converter<M, T> _second; |
63 | 58 |
64 _FusedConverter(this._first, this._second); | 59 _FusedConverter(this._first, this._second); |
65 | 60 |
66 T convert(S input) => _second.convert(_first.convert(input)); | 61 T convert(S input) => _second.convert(_first.convert(input)); |
| 62 |
| 63 Sink/*<S>*/ startChunkedConversion(Sink/*<T>*/ sink) { |
| 64 return _first.startChunkedConversion(_second.startChunkedConversion(sink)); |
| 65 } |
67 } | 66 } |
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