bluebird/js/zalgo/some_promise_array.js

Full featured Promises/A+ implementation with exceptionally good performance

/**
 * Copyright (c) 2013 Petka Antonov
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:</p>
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
"use strict";
var PromiseArray = require( "./promise_array.js" );
var util = require("./util.js");
var inherits = util.inherits;
var isArray = util.isArray;
function SomePromiseArray( values, caller, boundTo ) {
    this.constructor$( values, caller, boundTo );
    this._howMany = 0;

}
inherits( SomePromiseArray, PromiseArray );

SomePromiseArray.prototype._init = function SomePromiseArray$_init() {
    this._init$( void 0, 1 );

    var isArrayResolved = isArray( this._values );
    this._holes = isArrayResolved
        ? this._values.length - this.length()
        : 0;

    if( !this._isResolved() && isArrayResolved ) {
        this._howMany = Math.max(0, Math.min( this._howMany, this.length() ) );
        if( this.howMany() > this._canPossiblyFulfill()  ) {
            this._reject( [] );
        }
    }
};

SomePromiseArray.prototype.howMany = function SomePromiseArray$howMany() {
    return this._howMany;
};

SomePromiseArray.prototype.setHowMany =
function SomePromiseArray$setHowMany( count ) {
    if( this._isResolved() ) return;
    this._howMany = count;
};

SomePromiseArray.prototype._promiseFulfilled =
function SomePromiseArray$_promiseFulfilled( value ) {
    if( this._isResolved() ) return;
    this._addFulfilled( value );
    if( this._fulfilled() === this.howMany() ) {
        this._values.length = this.howMany();
        this._fulfill( this._values );
    }

};
SomePromiseArray.prototype._promiseRejected =
function SomePromiseArray$_promiseRejected( reason ) {
    if( this._isResolved() ) return;
    this._addRejected( reason );

    if( this.howMany() > this._canPossiblyFulfill() ) {
        if( this._values.length === this.length() ) {
            this._reject([]);
        }
        else {
            this._reject( this._values.slice( this.length() + this._holes ) );
        }
    }
};

SomePromiseArray.prototype._fulfilled = function SomePromiseArray$_fulfilled() {
    return this._totalResolved;
};

SomePromiseArray.prototype._rejected = function SomePromiseArray$_rejected() {
    return this._values.length - this.length() - this._holes;
};

SomePromiseArray.prototype._addRejected =
function SomePromiseArray$_addRejected( reason ) {
    this._values.push( reason );
};

SomePromiseArray.prototype._addFulfilled =
function SomePromiseArray$_addFulfilled( value ) {
    this._values[ this._totalResolved++ ] = value;
};

SomePromiseArray.prototype._canPossiblyFulfill =
function SomePromiseArray$_canPossiblyFulfill() {
    return this.length() - this._rejected();
};

module.exports = SomePromiseArray;