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// 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);
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