import java.util.HashMap;
import java.util.Map;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.events.EndElement;
import javax.xml.stream.events.StartElement;
import javax.xml.stream.events.XMLEvent;

public class StAXSample4 {
    private Map<Integer, EventHandler> handlers;

    public StAXSample4(String xmlfile) throws FileNotFoundException, XMLStreamException {
        handlers = initHandlers();

        XMLInputFactory factory = XMLInputFactory.newInstance();

        BufferedInputStream stream = new BufferedInputStream(new FileInputStream(xmlfile));
        XMLEventReader reader = factory.createXMLEventReader(stream);

        while (reader.hasNext()) {
            XMLEvent event = reader.nextEvent();

            EventHandler handler = handlers.get(event.getEventType());
            handler.handleEvent(event);
        }

        reader.close();
    }

    private Map<Integer, EventHandler> initHandlers() {
        Map<Integer, EventHandler> handlers
            = new HashMap<Integer, EventHandler>();

        handlers.put(XMLEvent.START_ELEMENT, new StartElementHandler());
        handlers.put(XMLEvent.END_ELEMENT, new EndElementHandler());
        handlers.put(XMLEvent.ATTRIBUTE, new GeneralElementHandler());
        handlers.put(XMLEvent.CDATA, new GeneralElementHandler());
        handlers.put(XMLEvent.CHARACTERS, new GeneralElementHandler());
        handlers.put(XMLEvent.COMMENT, new GeneralElementHandler());
        handlers.put(XMLEvent.DTD, new GeneralElementHandler());
        handlers.put(XMLEvent.END_DOCUMENT, new GeneralElementHandler());
        handlers.put(XMLEvent.ENTITY_DECLARATION, new GeneralElementHandler());
        handlers.put(XMLEvent.ENTITY_REFERENCE, new GeneralElementHandler());
        handlers.put(XMLEvent.NAMESPACE, new GeneralElementHandler());
        handlers.put(XMLEvent.NOTATION_DECLARATION, new GeneralElementHandler());
        handlers.put(XMLEvent.PROCESSING_INSTRUCTION, new GeneralElementHandler());
        handlers.put(XMLEvent.SPACE, new GeneralElementHandler());
        handlers.put(XMLEvent.START_DOCUMENT, new GeneralElementHandler());

        return handlers;
    }

    public static void main(String[] args) throws FileNotFoundException, XMLStreamException {
        new StAXSample4(args[0]);
    }
}

interface EventHandler {
    public void handleEvent(XMLEvent element);
}

class StartElementHandler implements EventHandler {
    public void handleEvent(XMLEvent event) {
        StartElement element = (StartElement)event;
        System.out.println("StartElement: " + element.getName().getLocalPart());
    }
}

class EndElementHandler implements EventHandler {
    public void handleEvent(XMLEvent event) {
        EndElement element = (EndElement)event;
        System.out.println("EndElement: " + element.getName().getLocalPart());
    }
}

class GeneralElementHandler implements EventHandler {
    public void handleEvent(XMLEvent event) {}
}