/* Parser skeleton for processing item-???.xml files. Must be compiled in
 * JDK 1.5 or above.
 *
 * Instructions:
 *
 * This program processes all files passed on the command line (to parse
 * an entire diectory, type "java MyParser myFiles/*.xml" at the shell).
 *
 */

import java.io.FileReader;
import java.text.*;
import java.util.*;
import org.xml.sax.XMLReader;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.XMLReaderFactory;
import org.xml.sax.helpers.DefaultHandler;


public class MySAX extends DefaultHandler
{

    public static void main (String args[])
	throws Exception
    {
	XMLReader xr = XMLReaderFactory.createXMLReader();
	MySAX handler = new MySAX();
	xr.setContentHandler(handler);
	xr.setErrorHandler(handler);

				// Parse each file provided on the
				// command line.
	for (int i = 0; i < args.length; i++) {
	    FileReader r = new FileReader(args[i]);
	    xr.parse(new InputSource(r));
	}
    }


    public MySAX ()
    {
	super();
    }

    /* Returns the amount (in XXXXX.xx format) denoted by a money-string
     * like $3,453.23. Returns the input if the input is an empty string.
     */
    static String strip(String money) {
        if (money.equals(""))
            return money;
        else {
            double am = 0.0;
            NumberFormat nf = NumberFormat.getCurrencyInstance(Locale.US);
            try { am = nf.parse(money).doubleValue(); }
            catch (ParseException e) {
                System.out.println("This method should work for all " +
                                   "money values you find in our data.");
                System.exit(20);
            }
            nf.setGroupingUsed(false);
            return nf.format(am).substring(1);
        }
    }

    ////////////////////////////////////////////////////////////////////
    // Event handlers.
    ////////////////////////////////////////////////////////////////////


    public void startDocument ()
    {
	System.out.println("Start document");
    }


    public void endDocument ()
    {
	System.out.println("End document");
    }


    public void startElement (String uri, String name,
			      String qName, Attributes atts)
    {
	if ("".equals (uri))
	    System.out.println("Start element: " + qName);
	else
	    System.out.println("Start element: {" + uri + "}" + name);
	for (int i = 0; i < atts.getLength(); i++) {
	    System.out.println("Attribute: " + atts.getLocalName(i) + "=" + atts.getValue(i));
	}
    }


    public void endElement (String uri, String name, String qName)
    {
	if ("".equals (uri))
	    System.out.println("End element: " + qName);
	else
	    System.out.println("End element:   {" + uri + "}" + name);
    }


    public void characters (char ch[], int start, int length)
    {
	System.out.print("Characters:    \"");
	for (int i = start; i < start + length; i++) {
	    switch (ch[i]) {
	    case '\\':
		System.out.print("\\\\");
		break;
	    case '"':
		System.out.print("\\\"");
		break;
	    case '\n':
		System.out.print("\\n");
		break;
	    case '\r':
		System.out.print("\\r");
		break;
	    case '\t':
		System.out.print("\\t");
		break;
	    default:
		System.out.print(ch[i]);
		break;
	    }
	}
	System.out.print("\"\n");
    }

}