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An extremely small (6KB) XML parser
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/* XMLParseException.java
 *
 * $Revision: 1.4 $
 * $Date: 2002/03/24 10:27:59 $
 * $Name: RELEASE_2_2_1 $
 *
 * This file is part of NanoXML 2 Lite.
 * Copyright (C) 2000-2002 Marc De Scheemaecker, All Rights Reserved.
 *
 * This software is provided 'as-is', without any express or implied warranty.
 * In no event will the authors be held liable for any damages arising from the
 * use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 *  1. The origin of this software must not be misrepresented; you must not
 *     claim that you wrote the original software. If you use this software in
 *     a product, an acknowledgment in the product documentation would be
 *     appreciated but is not required.
 *
 *  2. Altered source versions must be plainly marked as such, and must not be
 *     misrepresented as being the original software.
 *
 *  3. This notice may not be removed or altered from any source distribution.
 *****************************************************************************/


package nanoxml;


/**
 * An XMLParseException is thrown when an error occures while parsing an XML
 * string.
 * 
 * $Revision: 1.4 $

 * $Date: 2002/03/24 10:27:59 $

 *
 * @see nanoxml.XMLElement
 *
 * @author Marc De Scheemaecker
 * @version $Name: RELEASE_2_2_1 $, $Revision: 1.4 $
 */
public class XMLParseException
    extends RuntimeException
{

    /**
     * Indicates that no line number has been associated with this exception.
     */
    public static final int NO_LINE = -1;


    /**
     * The line number in the source code where the error occurred, or
     * NO_LINE if the line number is unknown.
     *
     * 
Invariants:

     * lineNr > 0 || lineNr == NO_LINE
     * 
     */
    private int lineNr;


    /**
     * Creates an exception.
     *
     * @param name    The name of the element where the error is located.
     * @param message A message describing what went wrong.
     *
     * Preconditions:

     * message != null
     * 
     *
     * Postconditions:

     * getLineNr() => NO_LINE
     * 

     */
    public XMLParseException(String name,
                             String message)
    {
        super("XML Parse Exception during parsing of "
              + ((name == null) ? "the XML definition"
                                : ("a " + name + " element"))
              + ": " + message);
        this.lineNr = XMLParseException.NO_LINE;
    }


    /**
     * Creates an exception.
     *
     * @param name    The name of the element where the error is located.
     * @param lineNr  The number of the line in the input.
     * @param message A message describing what went wrong.
     *
     * 
Preconditions:

     * message != null
     *     
lineNr > 0
     * 
     *
     * Postconditions:

     * getLineNr() => lineNr
     * 
     */
    public XMLParseException(String name,
                             int    lineNr,
                             String message)
    {
        super("XML Parse Exception during parsing of "
              + ((name == null) ? "the XML definition"
                                : ("a " + name + " element"))
              + " at line " + lineNr + ": " + message);
        this.lineNr = lineNr;
    }


    /**
     * Where the error occurred, or NO_LINE if the line number is
     * unknown.
     *
     * @see nanoxml.XMLParseException#NO_LINE
     */
    public int getLineNr()
    {
        return this.lineNr;
    }

}