/*
 * Southampton University Map App
 * Copyright (C) 2011  Christopher Baines
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package net.cbaines.suma;

import org.osmdroid.ResourceProxy;
import org.osmdroid.views.overlay.PathOverlay;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

public class DataHandler extends DefaultHandler {

	// this holds the data
	private PathOverlay _data;

	private int colour;
	private ResourceProxy resProxy;

	public DataHandler(int colour, ResourceProxy resProxy) {
		this.colour = colour;
		this.resProxy = resProxy;
	}

	/**
	 * Returns the data object
	 * 
	 * @return
	 */
	public PathOverlay getData() {
		return _data;
	}

	/**
	 * This gets called when the xml document is first opened
	 * 
	 * @throws SAXException
	 */
	@Override
	public void startDocument() throws SAXException {
		_data = new PathOverlay(colour, resProxy);
	}

	/**
	 * Called when it's finished handling the document
	 * 
	 * @throws SAXException
	 */
	@Override
	public void endDocument() throws SAXException {

	}

	/**
	 * This gets called at the start of an element. Here we're also setting the
	 * booleans to true if it's at that specific tag. (so we know where we are)
	 * 
	 * @param namespaceURI
	 * @param localName
	 * @param qName
	 * @param atts
	 * @throws SAXException
	 */
	@Override
	public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
		if (localName.equals("trkpt")) {
			// Log.v("DataHandler", "Adding point to route overlay " +
			// atts.getValue("lat") + " " +
			// atts.getValue("lon"));
			_data.addPoint(Util.csLatLongToGeoPoint(atts.getValue("lat"), atts.getValue("lon")));
		}
	}

	/**
	 * Called at the end of the element. Setting the booleans to false, so we
	 * know that we've just left that tag.
	 * 
	 * @param namespaceURI
	 * @param localName
	 * @param qName
	 * @throws SAXException
	 */
	@Override
	public void endElement(String namespaceURI, String localName, String qName) throws SAXException {

	}

	/**
	 * Calling when we're within an element. Here we're checking to see if there
	 * is any content in the tags that we're interested in and populating it in
	 * the Config object.
	 * 
	 * @param ch
	 * @param start
	 * @param length
	 */
	@Override
	public void characters(char ch[], int start, int length) {

	}
}