58 lines
1.8 KiB
JavaScript
58 lines
1.8 KiB
JavaScript
// 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}
|
|
*/
|
|
goog.result.DeferredAdaptor = function(result) {
|
|
goog.base(this);
|
|
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);
|