/gecko_sdk/idl/nsIHashable.idl

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla XPCOM.
 *
 * The Initial Developer of the Original Code is
 * Benjamin Smedberg <benjamin@smedbergs.us>.
 *
 * Portions created by the Initial Developer are Copyright (C) 2005
 * the Mozilla Foundation <http://www.mozilla.org/>. All Rights Reserved.
 *
 * Contributor(s):
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

/**
 * Represents an object that can be stored in a hashtable.
 *
 * @status FROZEN - This interface will not change in the Mozilla 1.x lifetime
 */
[scriptable, uuid(17e595fa-b57a-4933-bd0f-b1812e8ab188)]
interface nsIHashable : nsISupports
{
  /**
   * Is this object the equivalent of the other object?
   */
  boolean equals(in nsIHashable aOther);

  /**
   * A generated hashcode for this object. Objects that are equivalent
   * must have the same hash code. Getting this property should never
   * throw an exception!
   */
  readonly attribute unsigned long hashCode;
};