EventHandler.java

package com.owera.xaps.tr069.xml;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;


/**
 * The class is responsible for parsing the Event entity and populating the EventList
 * which is a list of EventStruct objects (Note that each EventStruct object
 * has two parameters called the EventCode and the CommandKey).
 * 
 * 
 * @author knut petter
 * 
 */

public class EventHandler extends DefaultHandler {

	public static final String EVENT_TAG = "Event";
	public static final String EVENT_STRUCT_TAG = "EventStruct";
	public static final String EVENT_CODE_TAG = "EventCode";
	public static final String COMMAND_KEY_TAG = "CommandKey";

	private Parser owner;
	private EventList events = new EventList();
	private EventStruct currEvent = null;
	private StringBuilder currTextContent = new StringBuilder();

	public EventHandler(EventList events, Parser owner) {
		this.events = events;
		this.owner = owner;
	}

	public void startElement(String namespaceURI, String localName, String qualifiedName, Attributes attributes) throws SAXException {
		currTextContent = new StringBuilder();
		if (EVENT_STRUCT_TAG.equals(localName)) {
			currEvent = new EventStruct();
		}
	}

	public void endElement(String namespaceURI, String localName, String qualifiedName) throws SAXException {
		if (EVENT_TAG.equals(localName)) {
			owner.getXMLReader().setContentHandler(owner);
		} else if (EVENT_STRUCT_TAG.equals(localName)) {
			if (currEvent != null) {
				events.addEvent(currEvent);
				currEvent = null;
			}
		} else if (EVENT_CODE_TAG.equals(localName)) {
			if (currEvent != null) {
				currEvent.setEventCode(new String(currTextContent));
			}
		} else if (COMMAND_KEY_TAG.equals(localName)) {
			if (currEvent != null) {
				currEvent.setCommandKey(new String(currTextContent));
			}
		}
	}

	public void characters(char[] ch, int start, int length) throws SAXException {
		String content = String.valueOf(ch).substring(start, (start + length));
		currTextContent.append(content.trim());
	}
}