browser/components/feeds/src/GenericFactory.js

   1 # -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 # ***** BEGIN LICENSE BLOCK *****
   3 # Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4 #
   5 # The contents of this file are subject to the Mozilla Public License Version
   6 # 1.1 (the "License"); you may not use this file except in compliance with
   7 # the License. You may obtain a copy of the License at
   8 # http://www.mozilla.org/MPL/
   9 #
  10 # Software distributed under the License is distributed on an "AS IS" basis,
  11 # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12 # for the specific language governing rights and limitations under the
  13 # License.
  14 #
  15 # The Original Code is the Generic Component Factory.
  16 #
  17 # The Initial Developer of the Original Code is Google Inc.
  18 # Portions created by the Initial Developer are Copyright (C) 2006
  19 # the Initial Developer. All Rights Reserved.
  20 #
  21 # Contributor(s):
  22 #   Ben Goodger <beng@google.com>
  23 #
  24 # Alternatively, the contents of this file may be used under the terms of
  25 # either the GNU General Public License Version 2 or later (the "GPL"), or
  26 # the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27 # in which case the provisions of the GPL or the LGPL are applicable instead
  28 # of those above. If you wish to allow use of your version of this file only
  29 # under the terms of either the GPL or the LGPL, and not to allow others to
  30 # use your version of this file under the terms of the MPL, indicate your
  31 # decision by deleting the provisions above and replace them with the notice
  32 # and other provisions required by the GPL or the LGPL. If you do not delete
  33 # the provisions above, a recipient may use your version of this file under
  34 # the terms of any one of the MPL, the GPL or the LGPL.
  35 #
  36 # ***** END LICENSE BLOCK ***** */
  37
  38 /**
  39  * An object implementing nsIFactory that can construct other objects upon
  40  * createInstance, passing a set of parameters to that object's constructor.
  41  */
  42 function GenericComponentFactory(ctor, params) {
  43   this._ctor = ctor;
  44   this._params = params;
  45 }
  46 GenericComponentFactory.prototype = {
  47   _ctor: null,
  48   _params: null,
  49
  50   createInstance: function GCF_createInstance(outer, iid) {
  51     if (outer != null)
  52       throw Cr.NS_ERROR_NO_AGGREGATION;
  53     return (new this._ctor(this._params)).QueryInterface(iid);
  54   },
  55
  56   QueryInterface: function GCF_QueryInterface(iid) {
  57     if (iid.equals(Ci.nsIFactory) ||
  58         iid.equals(Ci.nsISupports))
  59       return this;
  60     throw Cr.NS_ERROR_NO_INTERFACE;
  61   }
  62 };
  63