bluebird/js/zalgo/catch_filter.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 ensureNotHandled = require( "./errors.js" ).ensureNotHandled;
var util = require( "./util.js");
var tryCatch1 = util.tryCatch1;
var errorObj = util.errorObj;

function CatchFilter( instances, callback, boundTo ) {
    this._instances = instances;
    this._callback = callback;
    this._boundTo = boundTo;
}
CatchFilter.prototype.doFilter = function CatchFilter$doFilter( e ) {
    if( e === null || typeof e !== "object" ) {
        throw e;
    }
    var cb = this._callback;
    for( var i = 0, len = this._instances.length; i < len; ++i ) {
        var item = this._instances[i];
        if( e instanceof item ) {
            var ret = tryCatch1( cb, this._boundTo, e );
            if( ret === errorObj ) {
                throw ret.e;
            }
            return ret;
        }
    }
    ensureNotHandled( e );
    throw e;
};

module.exports = CatchFilter;