runtime/org.argeo.slc.support.gis/src/main/java/org/argeo/slc/gpsbabel/GpsBabelPositionProvider.java

   1 package org.argeo.slc.gpsbabel;
   2
   3 import java.util.StringTokenizer;
   4
   5 import org.argeo.slc.jts.PositionProvider;
   6
   7 import com.vividsolutions.jts.geom.Coordinate;
   8 import com.vividsolutions.jts.geom.GeometryFactory;
   9 import com.vividsolutions.jts.geom.Point;
  10
  11 public class GpsBabelPositionProvider implements PositionProvider {
  12         private GpsBabelCall gpsBabelCall;
  13
  14         private GeometryFactory geometryFactory = new GeometryFactory();
  15
  16         private String inputFormat = "garmin,get_posn";
  17         private String inputFile = "usb:";
  18
  19         public void init() {
  20                 gpsBabelCall = new GpsBabelCall(inputFormat, inputFile, "csv", "-");
  21         }
  22
  23         public Point currentPosition() {
  24                 // lazy init
  25                 if (gpsBabelCall == null)
  26                         init();
  27
  28                 String output = gpsBabelCall.function();
  29                 StringTokenizer st = new StringTokenizer(output, ",");
  30                 Double latitude = Double.parseDouble(st.nextToken());
  31                 Double longitude = Double.parseDouble(st.nextToken());
  32                 Point position = geometryFactory.createPoint(new Coordinate(longitude,
  33                                 latitude));
  34                 return position;
  35         }
  36
  37 }