XMLErrorHandler.java

//
//  @(#)XMLErrorHandler.java	2/2003
//
//  Copyright 2003 Zachary DelProposto. All rights reserved.
//  Use is subject to license terms.
//
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//  Or from http://www.gnu.org/
//
package dip.world.variant.parser;

//import dip.gui.dialog.ErrorDialog;

import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.ErrorHandler;

/**
*	A simple error handler for the XML parsers.
*	<p>
*	Errors sent to an ErrorDialog
*/
public final class XMLErrorHandler implements ErrorHandler
{
	/** Create an XMLErrorHandler */
	public XMLErrorHandler()
	{
	}// XMLErrorHandler()
	
	
	/** Handle a (recoverable) error */
	public void error(SAXParseException exception)
	{
		showError(exception, "Error");
	}// error()
	
	/** Handle a non-recoverable error */
	public void fatalError(SAXParseException exception)
	{
		showError(exception, "Fatal Error");
	}// fatalError()
	
	/** Handle a warning */
	public void warning(SAXParseException exception)	
	{
		showError(exception, "Warning");
	}// warning()
	
	/** Dialog method for error handling */
	protected void showError(SAXParseException e, String type)
	{
		StringBuffer sb = new StringBuffer(256);
		sb.append("XML Validation ");
		sb.append(type);
		sb.append(":\n");
		sb.append(getLocationString(e));
		//ErrorDialog.displayGeneral(null, new SAXException(sb.toString()));
	}// showError()
	
	
	/** Gets the error, nicely formatted */
	protected String getLocationString(SAXParseException e)
	{
		StringBuffer sb = new StringBuffer(256);
		String systemId = e.getSystemId();
		
		if(systemId != null)
		{
			final int index = systemId.lastIndexOf('/');
			
			if(index != -1)
			{
				systemId = systemId.substring(index + 1);
			}
			
			sb.append(systemId);
			sb.append(':');
		}
		
		sb.append("line ");
		sb.append(e.getLineNumber());
		sb.append(":col ");
		sb.append(e.getColumnNumber());
		sb.append(':');
		sb.append(e.getMessage());
		
		//e.printStackTrace();
		
		return sb.toString();
	}// getLocationString()
	
	
}// class XMLErrorHandler