//Code to demonstrate the parsing of XML via SAX method

import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.apache.xerces.parsers.SAXParser;
import java.io.*;

public class PrintUsingSAX extends DefaultHandler
{
     
    public PrintUsingSAX(String fileName)
    {
        try
        {
            XMLReader  myParser = new SAXParser();
            myParser.setContentHandler(this);
            myParser.setErrorHandler(this);
            myParser.parse(fileName);
        }
        catch(Exception e)
        {
            System.out.println("Exc " + e);   
        }
        
    }//end of constructor
    
    
    public void startDocument()
    {
        System.out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
        
    } // startDocument()

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

    } // endDocument()

    public void startElement(String uri, String local, String name, Attributes attrs)
    {
        System.out.print('<' + name );
        
        if (attrs != null)
        {
            
            int len = attrs.getLength();
            for (int i = 0; i < len; i++)
            {
                System.out.print(" " 
                + attrs.getQName(i) 
                + "=\"" 
                + attrs.getValue(i)
                + "\"");
            }
        }//end of if
        System.out.print('>');

    } // startElement(String,Attributes)

    public void endElement(String uri, String local, String name)
    {
        System.out.print("</" + name + ">");
    } // endElement(String)

    public void characters(char ch[], int start, int length)
    {
        System.out.print(new String(ch, start, length));
    } // characters(char[],int,int);

    public void processingInstruction(String target, String data)
    {

        System.out.print("<?" + target ); 
        if (data != null && data.length() > 0)
        {
            System.out.print(' ' + data );
        }
        System.out.println("?>");

    } // processingInstruction(String,String)

    public void ignorableWhitespace(char ch[], int start, int length)
    {

        characters(ch, start, length);

    } // ignorableWhitespace(char[],int,int);


    
    public static void main(String args[])
    {
        String xmlFileName="";
        if(args.length == 0)
        {
            //Check to ensure user XML file name to parse  
            System.out.println("Usage::java PrintUsingSAX path/xmlFilename");
            System.exit(0);
        }
        else
        {
            xmlFileName = args[0];
        }
        
        PrintUsingSAX pux = new PrintUsingSAX(xmlFileName);
        
        
    }//end of main
}//end of PrintUsingSAX