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/* XMLValidationException.java                                     NanoXML/Java
 *
 * $Revision: 1.3 $
 * $Date: 2002/01/04 21:03:29 $
 * $Name: RELEASE_2_2_1 $
 *
 * This file is part of NanoXML 2 for Java.
 * 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 net.n3.nanoxml;


/**
 * An XMLValidationException is thrown when the XML passed to the XML parser is
 * well-formed but not valid.
 *
 * @author Marc De Scheemaecker
 * @version $Name: RELEASE_2_2_1 $, $Revision: 1.3 $
 */
public class XMLValidationException
   extends XMLException
{

   /**
    * An element was missing.
    */
   public static final int MISSING_ELEMENT = 1;


   /**
    * An unexpected element was encountered.
    */
   public static final int UNEXPECTED_ELEMENT = 2;


   /**
    * An attribute was missing.
    */
   public static final int MISSING_ATTRIBUTE = 3;


   /**
    * An unexpected attribute was encountered.
    */
   public static final int UNEXPECTED_ATTRIBUTE = 4;


   /**
    * An attribute has an invalid value.
    */
   public static final int ATTRIBUTE_WITH_INVALID_VALUE = 5;


   /**
    * A PCDATA element was missing.
    */
   public static final int MISSING_PCDATA = 6;


   /**
    * An unexpected PCDATA element was encountered.
    */
   public static final int UNEXPECTED_PCDATA = 7;


   /**
    * Another error than those specified in this class was encountered.
    */
   public static final int MISC_ERROR = 0;


   /**
    * Which error occurred.
    */
   private int errorType;


   /**
    * The name of the element where the exception occurred.
    */
   private String elementName;


   /**
    * The name of the attribute where the exception occurred.
    */
   private String attributeName;


   /**
    * The value of the attribute where the exception occurred.
    */
   private String attributeValue;


   /**
    * Creates a new exception.
    *
    * @param errorType      the type of validity error
    * @param systemID       the system ID from where the data came
    * @param lineNr         the line number in the XML data where the
    *                       exception occurred.
    * @param elementName    the name of the offending element
    * @param attributeName  the name of the offending attribute
    * @param attributeValue the value of the offending attribute
    * @param msg            the message of the exception.
    */
   public XMLValidationException(int    errorType,
                                 String systemID,
                                 int    lineNr,
                                 String elementName,
                                 String attributeName,
                                 String attributeValue,
                                 String msg)
   {
      super(systemID, lineNr, null,
            msg + ((elementName == null) ? "" : (", element=" + elementName))
            + ((attributeName == null) ? ""
                                       : (", attribute=" + attributeName))
            + ((attributeValue == null) ? ""
                                       : (", value='" + attributeValue + "'")),
            false);
      this.elementName = elementName;
      this.attributeName = attributeName;
      this.attributeValue = attributeValue;
   }


   /**
    * Cleans up the object when it's destroyed.
    */
   protected void finalize()
      throws Throwable
   {
      this.elementName = null;
      this.attributeName = null;
      this.attributeValue = null;
      super.finalize();
   }


   /**
    * Returns the name of the element in which the validation is violated.
    * If there is no current element, null is returned.
    */
   public String getElementName()
   {
      return this.elementName;
   }


   /**
    * Returns the name of the attribute in which the validation is violated.
    * If there is no current attribute, null is returned.
    */
   public String getAttributeName()
   {
      return this.attributeName;
   }


   /**
    * Returns the value of the attribute in which the validation is violated.
    * If there is no current attribute, null is returned.
    */
   public String getAttributeValue()
   {
      return this.attributeValue;
   }

}