source: vbox/trunk/src/libs/xpcom18a4/xpcom/base/nsIExceptionService.idl@ 4837

/* -*- 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
 * ActiveState Tool Corp..
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Mark Hammond <MarkH@ActiveState.com>
 *
 * 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"
#include "nsIException.idl"

// An exception provider.  These can turn special nsresult codes
// into nsIExceptions

[scriptable, uuid(0577744c-c1d2-47f2-8bcc-ce7a9e5a88fc)]
interface nsIExceptionProvider : nsISupports
{
    /** Gets an nsIException or returns NULL if not possible. **/
    nsIException getException(in nsresult result, in nsIException defaultException);
};

// A ScriptErrorManager for a single thread.  These objects
// are _not_ thread-safe.  Use the ScriptErrorService
// to get a script error manager for your current thread.
[scriptable, uuid(efc9d00b-231c-4feb-852c-ac017266a415)]
interface nsIExceptionManager : nsISupports
{
    /** Sets (or clears with nsnull) the current error on the this thread. */
    void setCurrentException( in nsIException error);

    /** Gets the current error for the current thread, or NULL if no error */
     nsIException getCurrentException();

    /** Gets an exception from a registered exception provider..
        This has no effect on the "current exception" */
    nsIException getExceptionFromProvider( in nsresult rc, in nsIException defaultException);
};


// The Exception Service.  Allows you to get an set exceptions in a thread
// safe manner, or to get an ExceptionManager for your specific thread.
[scriptable, uuid(35A88F54-F267-4414-92A7-191F6454AB52)]
interface nsIExceptionService : nsIExceptionManager
{
    /** Obtains an exception manager for the current thread. */
    readonly attribute nsIExceptionManager currentExceptionManager;

    /** Installs an "exception provider" which is capable of
        translating an nsresult into an exception.  This enables
        error providers to return simple nsresults and only provide
        rich errors when specifically requested. It also has the
        advantage of allowing code like the DOM to handle all errors
        in a single function rather than at each XPCOM entry point.
        NOTE: This interface must be thread-safe - it will be called
        on whatever thread needs the error translation performed.*/
    void registerExceptionProvider( in nsIExceptionProvider provider, in PRUint32 moduleCode );
    void unregisterExceptionProvider( in nsIExceptionProvider provider, in PRUint32 moduleCode );
};


%{ C++
#define NS_EXCEPTIONSERVICE_CLASSNAME "Exception Service"
// {35A88F54-F267-4414-92A7-191F6454AB52}
#define NS_EXCEPTIONSERVICE_CID \
{ 0x35a88f54, 0xf267, 0x4414, { 0x92, 0xa7, 0x19, 0x1f, 0x64, 0x54, 0xab, 0x52 } }
#define NS_EXCEPTIONSERVICE_CONTRACTID "@mozilla.org/exceptionservice;1"
%}