GpsBabelPositionProvider.java

   1 package org.argeo.slc.gpsbabel;
   2
   3 import java.util.StringTokenizer;
   4
   5 import org.argeo.slc.gis.model.Position;
   6 import org.argeo.slc.jts.PositionProvider;
   7
   8 import com.vividsolutions.jts.geom.Coordinate;
   9 import com.vividsolutions.jts.geom.GeometryFactory;
  10 import com.vividsolutions.jts.geom.Point;
  11
  12 public class GpsBabelPositionProvider implements PositionProvider {
  13         private GpsBabelCall gpsBabelCall;
  14
  15         private GeometryFactory geometryFactory = new GeometryFactory();
  16
  17         private String inputFormat = "garmin,get_posn";
  18         private String inputFile = "usb:";
  19
  20         public void init() {
  21                 gpsBabelCall = new GpsBabelCall(inputFormat, inputFile, "csv", "-");
  22         }
  23
  24         public Position currentPosition() {
  25                 // lazy init
  26                 if (gpsBabelCall == null)
  27                         init();
  28
  29                 String output = gpsBabelCall.function();
  30                 StringTokenizer st = new StringTokenizer(output, ",");
  31                 Double latitude = Double.parseDouble(st.nextToken());
  32                 Double longitude = Double.parseDouble(st.nextToken());
  33                 Point position = geometryFactory.createPoint(new Coordinate(longitude,
  34                                 latitude));
  35                 return new Position(position);
  36         }
  37
  38         public void setInputFormat(String inputFormat) {
  39                 this.inputFormat = inputFormat;
  40         }
  41
  42         public void setInputFile(String inputFile) {
  43                 this.inputFile = inputFile;
  44         }
  45
  46 }