package edu.stanford.rt.parser;

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


public class ParsingErrorHandler implements ErrorHandler
{
    /** Warning. */
    public void warning(SAXParseException ex)
    {
        System.out.println(
            "[Warning] "
                + getLocationString(ex)
                + ": "
                + ex.getMessage());
    }

    /** Error. */
    public void error(SAXParseException ex)
    {
        System.out.println(
            "[Error] "
                + getLocationString(ex)
                + ": "
                + ex.getMessage());
    }

    /** Fatal error. */
    public void fatalError(SAXParseException ex) throws SAXException
    {
        System.out.println(
            "[Fatal Error] "
                + getLocationString(ex)
                + ": "
                + ex.getMessage());
        throw ex;
    }

    /** Returns a string of the location. */
    private String getLocationString(SAXParseException ex)
    {
        StringBuffer str = new StringBuffer();

        String systemId = ex.getSystemId();
        if (systemId != null)
        {
            int index = systemId.lastIndexOf('/');
            if (index != -1)
                systemId = systemId.substring(index + 1);
            str.append(systemId);
        }
        str.append(':');
        str.append(ex.getLineNumber());
        str.append(':');
        str.append(ex.getColumnNumber());

        return str.toString();

    }

}