/* Uses a SAX parser to identify the parts of an XML
 * file. The user specifies whether to use a validating parser.
 */

import org.xml.sax.Attributes;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.XMLReader;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.SAXParser;
import org.xml.sax.InputSource;
import java.io.FileReader;

public class Sax extends DefaultHandler {
  private String docName;

  public void characters(char[] ch, int start, int length) {
  	String s = new String(ch, start, length);
  	s = s.trim();
  	if (!s.equals("")) {
  		System.out.println(s);
  	}
  }
  
  public void endDocument() {
  	System.out.println("End document: " + docName);
  }
   
  public void endElement(String uri, String localName, String qName) {
  }
  
  public void startDocument() {
    System.out.println("Document name: " + docName);
  }
  
  public void startElement(String uri, String localName, 
                      String qName, Attributes attributes){
	System.out.print(qName + ": ");

    for (int i = 0; i < attributes.getLength(); i++) {
    	System.out.print(attributes.getQName(i) + " = " + attributes.getValue(i) + ", ");
    }
    System.out.println();

  }
  
  public static void main(String[] args) {  
    Sax sax = new Sax(); 
    sax.docName = "barchart.xml";
    
    try {
      SAXParserFactory factory = SAXParserFactory.newInstance();
      factory.setValidating(false);
      SAXParser parser = factory.newSAXParser();
      XMLReader reader = parser.getXMLReader();
      reader.setContentHandler(sax);  
      reader.parse(new InputSource(new FileReader(sax.docName)));
    }catch (Exception e) {
       e.printStackTrace();
    }
  }
}