| // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| library async.result_future; |
| |
| import 'dart:async'; |
| |
| import '../result.dart'; |
| import 'delegate/future.dart'; |
| |
| /// A [Future] wrapper that provides synchronous access to the result of the |
| /// wrapped [Future] once it's completed. |
| class ResultFuture<T> extends DelegatingFuture<T> { |
| /// Whether the future has fired and [result] is available. |
| bool get isComplete => result != null; |
| |
| /// The result of the wrapped [Future], if it's completed. |
| /// |
| /// If it hasn't completed yet, this will be `null`. |
| Result<T> get result => _result; |
| Result<T> _result; |
| |
| factory ResultFuture(Future<T> future) { |
| var resultFuture; |
| resultFuture = new ResultFuture._(Result.capture(future).then((result) { |
| resultFuture._result = result; |
| return result.asFuture; |
| })); |
| return resultFuture; |
| } |
| |
| ResultFuture._(Future<T> future) |
| : super(future); |
| } |