bugcore
Version:
bugcore is a JavaScript library that provides a foundational architecture for object oriented JS
179 lines (139 loc) • 5.35 kB
JavaScript
/*
* Copyright (c) 2016 airbug Inc. http://airbug.com
*
* bugcore may be freely distributed under the MIT license.
*/
//-------------------------------------------------------------------------------
// Annotations
//-------------------------------------------------------------------------------
//@Export('Handler')
//@Require('Bug')
//@Require('Class')
//@Require('Obj')
//@Require('TypeUtil')
//-------------------------------------------------------------------------------
// Context
//-------------------------------------------------------------------------------
require('bugpack').context("*", function(bugpack) {
//-------------------------------------------------------------------------------
// BugPack
//-------------------------------------------------------------------------------
var Bug = bugpack.require('Bug');
var Class = bugpack.require('Class');
var Obj = bugpack.require('Obj');
var TypeUtil = bugpack.require('TypeUtil');
//-------------------------------------------------------------------------------
// Declare Class
//-------------------------------------------------------------------------------
/**
* @class
* @extends {Obj}
*/
var Handler = Class.extend(Obj, {
_name: "Handler",
//-------------------------------------------------------------------------------
// Constructor
//-------------------------------------------------------------------------------
/**
* @constructs
* @param {Promise} forwardPromise
*/
_constructor: function(forwardPromise) {
this._super();
//-------------------------------------------------------------------------------
// Private Properties
//-------------------------------------------------------------------------------
/**
* @private
* @type {boolean}
*/
this.executed = false;
/**
* @private
* @type {Promise}
*/
this.forwardPromise = forwardPromise;
},
//-------------------------------------------------------------------------------
// Getters and Setters
//-------------------------------------------------------------------------------
/**
* @return {boolean}
*/
getExecuted: function() {
return this.executed;
},
/**
* @return {Promise}
*/
getForwardPromise: function() {
return this.forwardPromise;
},
//-------------------------------------------------------------------------------
// Public Methods
//-------------------------------------------------------------------------------
/**
* @param {Array<*>} values
*/
handleFulfilled: function(values) {
if (!this.getExecuted()) {
this.executed = true;
this.doHandleFulfilled(values);
} else {
throw new Bug("IllegalState", {}, "Handler cannot be executed more than once");
}
},
/**
* @param {Array<*>} reasons
*/
handleRejected: function(reasons) {
if (!this.getExecuted()) {
this.executed = true;
this.doHandleRejected(reasons);
} else {
throw new Bug("IllegalState", {}, "Handler cannot be executed more than once");
}
},
//-------------------------------------------------------------------------------
// Protected Methods
//-------------------------------------------------------------------------------
/**
* @protected
* @param {function(*...)} method
* @param {Array<*>} args
*/
fireHandleMethod: function(method, args) {
try {
var result = method.apply(null, args);
if (TypeUtil.isUndefined(result)) {
this.forwardPromise.resolve([]);
} else {
this.forwardPromise.resolve([result]);
}
} catch(e) {
this.forwardPromise.reject([e]);
}
},
//-------------------------------------------------------------------------------
// Abstract Methods
//-------------------------------------------------------------------------------
/**
* @abstract
* @param {Array<*>} values
*/
doHandleFulfilled: function(values) {
throw new Bug("AbstractMethodNotImplemented", {}, "Must implement doHandleFulfilled");
},
/**
* @abstract
* @param {Array<*>} reasons
*/
doHandleRejected: function(reasons) {
throw new Bug("AbstractMethodNotImplemented", {}, "Must implement doHandleRejected");
}
});
//-------------------------------------------------------------------------------
// Exports
//-------------------------------------------------------------------------------
bugpack.export('Handler', Handler);
});