/*
 * The Apache Software License, Version 1.1
 * 
 * Copyright (c) 1999-2000 The Apache Software Foundation.  All rights
 * reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 * 
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache\@apache.org.
 * 
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

 /*
  * $Log: XMLErrorReporter.hpp,v $
  * Revision 1.8  2000/03/02 19:54:25  roddey
  * This checkin includes many changes done while waiting for the
  * 1.1.0 code to be finished. I can't list them all here, but a list is
  * available elsewhere.
  *
  * Revision 1.7  2000/02/24 20:00:23  abagchi
  * Swat for removing Log from API docs
  *
  * Revision 1.6  2000/02/16 23:03:48  roddey
  * More documentation updates
  *
  * Revision 1.5  2000/02/16 21:42:58  aruna1
  * API Doc++ summary changes in
  *
  * Revision 1.4  2000/02/15 23:59:07  roddey
  * More updated documentation of Framework classes.
  *
  * Revision 1.3  2000/02/15 01:21:31  roddey
  * Some initial documentation improvements. More to come...
  *
  * Revision 1.2  2000/02/06 07:47:48  rahulj
  * Year 2K copyright swat.
  *
  * Revision 1.1.1.1  1999/11/09 01:08:34  twl
  * Initial checkin
  *
  * Revision 1.2  1999/11/08 20:44:39  rahul
  * Swat for adding in Product name and CVS comment log variable.
  *
  */


#if !defined(XMLERRORREPORTER_HPP)
#define XMLERRORREPORTER_HPP

#include <util/XercesDefs.hpp>
#include <util/XMLMsgLoader.hpp>


/**
 *  This abstract class defines a callback mechanism for the scanner. By
 *  creating a class that implements this interface and plugging an instance
 *  of that class into the scanner, the scanner will call back on the object's
 *  virtual methods to report error events. This class is also used with the
 *  validator, to allow it to report errors.
 *
 *  This class is primarily for use by those writing their own parser classes.
 *  If you use the standard parser classes, DOMParser and SAXParser, you won't
 *  use this API. You will instead use a similar mechanism defined by the SAX
 *  API, called ErrorHandler.
 */
class XMLPARSER_EXPORT XMLErrorReporter
{
public:
    // -----------------------------------------------------------------------
    //  The types of errors we can issue
    // -----------------------------------------------------------------------
    enum ErrTypes
    {
        ErrType_Warning
        , ErrType_Invalid
        , ErrType_Fatal

        , ErrTypes_Unknown
    };


    // -----------------------------------------------------------------------
    //  Constructors are hidden, only the virtual destructor is exposed
    // -----------------------------------------------------------------------

    /** @name Destructor */
    //@{

    /**
      *   Default destructor
      */
    virtual ~XMLErrorReporter()
    {
    }
    //@}


    // -----------------------------------------------------------------------
    //  The error handler interface
    // -----------------------------------------------------------------------

    /** @name Error Handler interface */
    //{@

    /** Called to report errors from the scanner or validator
      *
      * This method is called back on by the scanner or validator (or any other
      * internal parser component which might need to report an error in the
      * future.) It contains all the information that the client code might
      * need to report or log the error.
      *
      * @param  errCode     The error code of the error being reported. What
      *                     this means is dependent on the domain it is from.
      *
      * @param  errDomain   The domain from which the error occured. The domain
      *                     is a means of providing a hierarchical layering to
      *                     the error system, so that a single set of error id
      *                     numbers don't have to be split up.
      *
      * @param  type        The error type, which is defined mostly by XML which
      *                     categorizes errors into warning, errors and validity
      *                     constraints.
      *
      * @param  errorText   The actual text of the error. This is translatable,
      *                     so can possibly be in the local language if a
      *                     translation has been provided.
      *
      * @param  sysetmId    The system id of the entity where the error occured,
      *                     fully qualified.
      *
      * @param  publicId    The optional public id of the entity were the error
      *                     occured. It can be an empty string if non was provided. 
      *
      * @param  lineNum     The line number within the source XML of the error.
      *
      * @param  colNum      The column number within the source XML of the error.
      *                     Because of the parsing style, this is usually just
      *                     after the actual offending text.
      */
    virtual void error
    (
        const   unsigned int        errCode
        , const XMLCh* const        errDomain
        , const ErrTypes            type
        , const XMLCh* const        errorText
        , const XMLCh* const        systemId
        , const XMLCh* const        publicId
        , const unsigned int        lineNum
        , const unsigned int        colNum
    ) = 0;

    /** Called before a new parse event to allow the handler to reset
      *
      * This method is called by the scanner before a new parse event is
      * about to start. It gives the error handler a chance to reset its
      * internal state.
      */
    virtual void resetErrors() = 0;

    //@}


protected :
        
    /** @name Constructor */
    //@{

    /**
      *   Default constructor
      */
    XMLErrorReporter()
    {
    }
    //@}

private:
    // -----------------------------------------------------------------------
    //  Unimplemented constructors and destructor
    // -----------------------------------------------------------------------
    XMLErrorReporter(const XMLErrorReporter&);
    void operator=(const XMLErrorReporter&);
};

#endif
