GpxTrackParser.java :  » UnTagged » yozi » com » robert » maps » kml » XMLparser » Android Open Source

package com.robert.maps.kml.XMLparser;

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

import com.robert.maps.kml.PoiManager;
import com.robert.maps.kml.Track;

public class GpxTrackParser extends DefaultHandler {
  private StringBuilder builder;
  private PoiManager mPoiManager;
  private Track mTrack;

  private static final String TRK = "trk";
  private static final String LAT = "lat";
  private static final String LON = "lon";
  private static final String NAME = "name";
  private static final String CMT = "cmt";
  private static final String DESC = "desc";
  private static final String POINT = "trkpt";
  private static final String ELE = "ele";



  public GpxTrackParser(PoiManager poiManager) {
    super();
    builder = new StringBuilder();
    mPoiManager = poiManager;
    mTrack = new Track();
  }

  @Override
  public void characters(char[] ch, int start, int length) throws SAXException {
    builder. append(ch, start, length);
    super.characters(ch, start, length);
  }

  @Override
  public void startElement(String uri, String localName, String name, Attributes attributes)
      throws SAXException {
    builder.delete(0, builder.length());
    if(localName.equalsIgnoreCase(TRK))
      mTrack = new Track();
    else if(localName.equalsIgnoreCase(POINT)){
      mTrack.AddTrackPoint();
      mTrack.LastTrackPoint.lat = Double.parseDouble(attributes.getValue(LAT));
      mTrack.LastTrackPoint.lon = Double.parseDouble(attributes.getValue(LON));
    }

    super.startElement(uri, localName, name, attributes);
  }

  @Override
  public void endElement(String uri, String localName, String name) throws SAXException {
    if(localName.equalsIgnoreCase(TRK)){
      if(mTrack.Name.equalsIgnoreCase("")) mTrack.Name = "Track";
      mPoiManager.updateTrack(mTrack);
    }
    else if(localName.equalsIgnoreCase(NAME))
      mTrack.Name = builder.toString().trim();
    else if(localName.equalsIgnoreCase(CMT))
      mTrack.Descr = builder.toString().trim();
    else if(localName.equalsIgnoreCase(DESC))
      if(mTrack.Descr.equals(""))
        mTrack.Descr = builder.toString().trim();
    else if(localName.equalsIgnoreCase(ELE))
      mTrack.LastTrackPoint.alt = Double.parseDouble(builder.toString().trim());

    super.endElement(uri, localName, name);
  }

}