/* -*- 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 TransforMiiX XSLT processor code.
 *
 * The Initial Developer of the Original Code is
 * The MITRE Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Keith Visco <kvisco@ziplink.net> (Original Author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * 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"),
 * 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 ***** */

#ifndef MITRE_ERROROBSERVER_H
#define MITRE_ERROROBSERVER_H

#include "txCore.h"
#ifdef TX_EXE
#include <iostream.h>
#endif

/**
 * A simple interface for observing errors
**/
class ErrorObserver {

public:

    /**
     * Default Destructor for ErrorObserver
    **/
    virtual ~ErrorObserver() {};

    /**
     *  Notifies this Error observer of a new error aRes
    **/
    virtual void receiveError(const nsAString& errorMessage, nsresult aRes) = 0;

    /**
     *  Notifies this Error observer of a new error, with default
     *  error code NS_ERROR_FAILURE
    **/
    void receiveError(const nsAString& errorMessage)
    {
        receiveError(errorMessage, NS_ERROR_FAILURE);
    }

        

}; //-- ErrorObserver

#ifdef TX_EXE
/**
 * A simple ErrorObserver which allows printing error messages to a stream
**/
class SimpleErrorObserver : public ErrorObserver {

public:

    /**
     * Creates a new SimpleErrorObserver.
     * All errors will be printed to the console (cout).
    **/
    SimpleErrorObserver();

    /**
     * Creates a new SimpleErrorObserver.
     * All errors will be printed to the given ostream.
    **/
    SimpleErrorObserver(ostream& errStream);

    /**
     *  Notifies this Error observer of a new error aRes
    **/
    void receiveError(const nsAString& errorMessage, nsresult aRes);

    virtual void supressWarnings(MBool supress);

private:

    ostream* errStream;
    MBool hideWarnings;
}; //-- SimpleErrorObserver
#endif

#endif

