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| 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 |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 part of dart.convert; |
| 6 |
| 7 /** |
| 8 * A [Converter] converts data from one representation into another. |
| 9 * |
| 10 * *Converters are still experimental and are subject to change without notice.* |
| 11 * |
| 12 */ |
| 13 abstract class Converter<S, T> { |
| 14 /** |
| 15 * Converts [input] and returns the result of the conversion. |
| 16 */ |
| 17 T convert(S input); |
| 18 |
| 19 /** |
| 20 * Fuses `this` with [other]. |
| 21 * |
| 22 * Encoding with the resulting converter is equivalent to converting with |
| 23 * `this` before converting with `other`. |
| 24 */ |
| 25 Converter<S, dynamic> fuse(Converter<T, dynamic> other) { |
| 26 return new _FusedConverter<S, T, dynamic>(this, other); |
| 27 } |
| 28 } |
| 29 |
| 30 /** |
| 31 * Fuses two converters. |
| 32 * |
| 33 * For a non-chunked conversion converts the input in sequence. |
| 34 */ |
| 35 class _FusedConverter<S, M, T> extends Converter<S, T> { |
| 36 final Converter _first; |
| 37 final Converter _second; |
| 38 |
| 39 _FusedConverter(this._first, this._second); |
| 40 |
| 41 T convert(S input) => _second.convert(_first.convert(input)); |
| 42 } |
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