import java.io.*;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import org.xml.sax.*;
import org.xml.sax.helpers.*;
public class ProductsWriting extends DefaultHandler
{
	static int numberOfLines = 0;
	static String indentation = "";
	static String text[] = new String[1000];

	public static void main(String[] args) throws Exception
	{
		System.out.println("Start of Products...");
		ProductsWriting readerObj = new ProductsWriting();
		readerObj.read(args[0]);
		try
		{
			FileWriter writer = new FileWriter("Products_New.xml");
			for (int index = 0; index < numberOfLines; index++)
			{
				writer.write(text[index].toCharArray());
				writer.write('\n');
			}
			writer.close();
		}
		catch (Exception e)
		{
			e.printStackTrace(System.err);
		}
	}

	public void read(String fileName) throws Exception
	{
		XMLReader reader = XMLReaderFactory.createXMLReader
		  ("org.apache.xerces.parsers.SAXParser");
		reader.setContentHandler(this);
		reader.setErrorHandler(this);
		reader.parse(fileName);
	}

	public void startDocument()
	{
		text[numberOfLines] = indentation;
		text[numberOfLines] += "<?xml version=\"1.0\" encoding=\"" +
		  "UTF-8" + "\"?>";
		numberOfLines++;
	}

	public void processingInstruction(String target, String data)
	{
		text[numberOfLines] = indentation;
		text[numberOfLines] += "<?";
		text[numberOfLines] += target;
		if (data != null && data.length() > 0)
		{
			text[numberOfLines] += ' ';
			text[numberOfLines] += data;
		}
		text[numberOfLines] += "?>";
		numberOfLines++;
	}

	public void startElement(String uri, String localName,
	  String qualifiedName, Attributes attributes)
	{
		text[numberOfLines] = indentation;
		indentation += "    ";
		text[numberOfLines] += '<';
		text[numberOfLines] += qualifiedName;
		if (attributes != null)
		{
			int numberAttributes = attributes.getLength();
			for (int loopIndex = 0; loopIndex < numberAttributes; loopIndex++)
			{
				text[numberOfLines] += ' ';
				text[numberOfLines] += attributes.getQName(loopIndex);
				text[numberOfLines] += "=\"";
				text[numberOfLines] += attributes.getValue(loopIndex);
				text[numberOfLines] += '"';
			}
		}
		text[numberOfLines] += '>';
		numberOfLines++;
	}

	public void characters(char characters[], int start, int length)
	{
		String characterData = (new String(characters, start, length)).trim();
		if (characterData.indexOf("\n") < 0 && characterData.length() > 0)
		{
			text[numberOfLines] = indentation;
			text[numberOfLines] += characterData;
			numberOfLines++;
		}
	}

	public void endElement(String uri, String localName, String qualifiedName)
	{
		indentation = indentation.substring(0, indentation.length() - 4);
		text[numberOfLines] = indentation;
		text[numberOfLines] += "</";
		text[numberOfLines] += qualifiedName;
		text[numberOfLines] += '>';
		numberOfLines++;
		if (qualifiedName.equals("ProductNumber"))
		{
			startElement("", "Discount", "Discount", null);
			characters("10%".toCharArray(), 0, "10%".length());
			endElement("", "Discount", "Discount");
		}
	}

	public void warning(SAXParseException exception)
	{
		System.err.println("Warning: " + exception.getMessage());
	}

	public void error(SAXParseException exception)
	{
		System.err.println("Error: " + exception.getMessage());
	}

	public void fatalError(SAXParseException exception)
	{
		System.err.println("Fatal error: " + exception.getMessage());
	}
}