/*
* Search the field with name fieldName in the list of fields.
*/
private Field getField(String fieldName, Collection<Field> fields) {
for (Iterator<Field> iterator = fields.iterator(); iterator.hasNext(); ) {
Field field = (Field) iterator.next();
if (fieldName.equals(field.getName())) return field;
}
return null; // not found
}
/*
* Convert a fit field coördinate to a GPX coördinate. It will only convert
* fit fields with unit "semicircles".
*
* dms=semicircles*(180/2^31)
*/
public static BigDecimal semicircleToDms(Field field) {
BigDecimal dms = null;
if ((field != null) && ("semicircles".equals(field.getUnits()))) {
dms = semicircleToDms(field.getLongValue());
}
return dms; // 42.059009616
}
/**
* Convert the fit time field to the gpx time format (standard UTC time). Will only convert "s"
* seconds.
*
* @param time
* @return
*/
public static String convertTime(Field time) {
String result = null;
if ((time != null) && ("s".equals(time.getUnits()))) {
DateTime dateTime = new DateTime(time.getLongValue());
result = convertTime(dateTime.getDate());
}
return result;
}
@Override
public void onMesg(Mesg mesg) {
if ((mesg != null) && ("lap".equals(mesg.getName()))) {
// System.out.println("got here");
} else if ((mesg != null) && ("record".equals(mesg.getName()))) {
Telemetry point = new Telemetry();
// Search relevant info
Collection<Field> fields = mesg.getFields();
for (Field f : fields) {
f.getName();
}
Field time = getField("timestamp", fields);
Field cadence = getField("cadence", fields);
if (cadence != null) {
point.setCadence(cadence.getByteValue());
}
Field hr = getField("heart_rate", fields);
if (hr != null) {
point.setHeartRate(hr.getIntegerValue());
}
Field posLat = getField("position_lat", fields);
Field posLon = getField("position_long", fields);
// Convert semicircles latitude to decimals
if (posLat != null) {
BigDecimal posLatDec = semicircleToDms(posLat);
point.setLatitude(posLatDec.doubleValue());
}
if (posLon != null) {
BigDecimal posLonDec = semicircleToDms(posLon);
point.setLongitude(posLonDec.doubleValue());
}
Field elevation = getField("altitude", fields);
if (elevation != null) {
point.setElevation(elevation.getDoubleValue());
}
Field distance = getField("distance", fields);
if (distance != null) {
point.setDistance(distance.getDoubleValue());
}
if (time != null) {
point.setTime(time.getLongValue() * 1000 + OFFSET);
}
Field speed = getField("speed", fields);
if (speed != null) {
point.setSpeed(speed.getDoubleValue() * 3.6);
}
// use power from file
Field power = getField("power", fields);
if (power != null) {
point.setPower(power.getShortValue());
if (point.getPower() > 0) {
isPower = true; // contains power values
}
}
if (last != null) {
if (distance == null) {
if (posLat == null || posLon == null) {
// no latitude or longitude, drop
// point
return;
}
// calculate distance from GPS points
double d =
GPXReader.distance(
point.getLatitude(),
last.getLatitude(),
point.getLongitude(),
last.getLongitude(),
point.getElevation(),
last.getElevation());
if (d > 1000) {
// large value, drop.
return;
}
totalDistance += d;
point.setDistance(totalDistance);
} else if (point.getDistance() == last.getDistance()) {
// no change to distance, drop point
return;
}
if (speed == null) {
// calculate speed, s = d / t
// double speed = d * 3600
// / ((point.getTime() - adjust) - last.getTime());
}
double gradient =
(point.getElevation() - last.getElevation())
/ (point.getDistance() - last.getDistance());
point.setGradient(gAve.add(gradient));
} else {
// first time through
point.setResistance(WorkoutData.FIT);
}
last = point;
data.add(point);
}
}