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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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
 * http://www.mozilla.org/MPL/
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of 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"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsISupports.idl"

interface nsIFile;
interface nsIComponentManager;

/**
 * The nsIModule interface.
 * @status FROZEN
 */

[scriptable, uuid(7392D032-5371-11d3-994E-00805FD26FEE)]
interface nsIModule : nsISupports
{
    /** 
     * Object Instance Creation
     *
     * Obtains a Class Object from a nsIModule for a given CID and IID pair.  
     * This class object can either be query to a nsIFactory or a may be 
     * query to a nsIClassInfo.
     *
     * @param aCompMgr  : The global component manager
     * @param aClass    : ClassID of object instance requested
     * @param aIID      : IID of interface requested
     * 
     */
    void getClassObject(in nsIComponentManager aCompMgr, 
                        in nsCIDRef aClass,
                        in nsIIDRef aIID,
                        [retval, iid_is(aIID)] out nsQIResult aResult);


    /**
     * One time registration callback
     *
     * When the nsIModule is discovered, this method will be
     * called so that any setup registration can be preformed.
     *
     * @param aCompMgr  : The global component manager
     * @param aLocation : The location of the nsIModule on disk
     * @param aLoaderStr: Opaque loader specific string
     * @param aType     : Loader Type being used to load this module 
     */
    void registerSelf(in nsIComponentManager aCompMgr, 
                      in nsIFile aLocation,
                      in string aLoaderStr, 
                      in string aType);
    /**
     * One time unregistration callback
     *
     * When the nsIModule is being unregistered, this method will be
     * called so that any unregistration can be preformed
     *
     * @param aCompMgr   : The global component manager
     * @param aLocation  : The location of the nsIModule on disk
     * @param aLoaderStr : Opaque loader specific string
     * 
     */
   void unregisterSelf(in nsIComponentManager aCompMgr, 
                        in nsIFile aLocation,
                        in string  aLoaderStr);

   /** 
    * Module load management
    * 
    * @param aCompMgr  : The global component manager
    *
    * @return indicates to the caller if the module can be unloaded.
    * 		Returning PR_TRUE isn't a guarantee that the module will be
    *		unloaded. It constitues only willingness of the module to be
    *		unloaded.  It is very important to ensure that no outstanding 
    *       references to the module's code/data exist before returning 
    *       PR_TRUE. 
    *		Returning PR_FALSE guaratees that the module wont be unloaded.
    */
    boolean canUnload(in nsIComponentManager aCompMgr);
};