| // Copyright 2012 The Closure Library Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS-IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| /** |
| * @fileoverview An adaptor from a Result to a Deferred. |
| * |
| * TODO (vbhasin): cancel() support. |
| * TODO (vbhasin): See if we can make this a static. |
| * TODO (gboyer, vbhasin): Rename to "Adapter" once this graduates; this is the |
| * proper programmer spelling. |
| */ |
| |
| |
| goog.provide('goog.result.DeferredAdaptor'); |
| |
| goog.require('goog.async.Deferred'); |
| goog.require('goog.result'); |
| goog.require('goog.result.Result'); |
| |
| |
| |
| /** |
| * An adaptor from Result to a Deferred, for use with existing Deferred chains. |
| * |
| * @param {!goog.result.Result} result A result. |
| * @constructor |
| * @extends {goog.async.Deferred} |
| * @final |
| * @deprecated Use {@link goog.Promise} instead - http://go/promisemigration |
| */ |
| goog.result.DeferredAdaptor = function(result) { |
| goog.result.DeferredAdaptor.base(this, 'constructor'); |
| goog.result.wait(result, function(result) { |
| if (this.hasFired()) { |
| return; |
| } |
| if (result.getState() == goog.result.Result.State.SUCCESS) { |
| this.callback(result.getValue()); |
| } else if (result.getState() == goog.result.Result.State.ERROR) { |
| if (result.getError() instanceof goog.result.Result.CancelError) { |
| this.cancel(); |
| } else { |
| this.errback(result.getError()); |
| } |
| } |
| }, this); |
| }; |
| goog.inherits(goog.result.DeferredAdaptor, goog.async.Deferred); |