Java Code Examples for com.mapbox.api.directions.v5.models.DirectionsRoute#legs()

/**
 * Given the current {@link DirectionsRoute} and leg / step index,
 * return a list of {@link Point} representing the current step.
 * <p>
 * This method is only used on a per-step basis as {@link PolylineUtils#decode(String, int)}
 * can be a heavy operation based on the length of the step.
 * <p>
 * Returns null if index is invalid.
 *
 * @param directionsRoute for list of steps
 * @param legIndex        to get current step list
 * @param stepIndex       to get current step
 * @return list of {@link Point} representing the current step
 */
static List<Point> decodeStepPoints(DirectionsRoute directionsRoute, List<Point> currentPoints,
                                    int legIndex, int stepIndex) {
  List<RouteLeg> legs = directionsRoute.legs();
  if (hasInvalidLegs(legs)) {
    return currentPoints;
  }
  List<LegStep> steps = legs.get(legIndex).steps();
  if (hasInvalidSteps(steps)) {
    return currentPoints;
  }
  boolean invalidStepIndex = stepIndex < 0 || stepIndex > steps.size() - 1;
  if (invalidStepIndex) {
    return currentPoints;
  }
  LegStep step = steps.get(stepIndex);
  if (step == null) {
    return currentPoints;
  }
  String stepGeometry = step.geometry();
  if (stepGeometry != null) {
    return PolylineUtils.decode(stepGeometry, PRECISION_6);
  }
  return currentPoints;
}
 

@Test
public void multiLeg_getFractionTraveled_equalsCorrectValueAtIntervals() throws Exception {
  DirectionsRoute multiLegRoute = buildMultipleLegRoute();
  List<Float> fractionsRemaining = new ArrayList<>();
  List<Float> routeProgressFractionsTraveled = new ArrayList<>();

  for (RouteLeg leg : multiLegRoute.legs()) {
    for (int stepIndex = 0; stepIndex < leg.steps().size(); stepIndex++) {
      double stepDistanceRemaining = getFirstStep(multiLegRoute).distance();
      double legDistanceRemaining = multiLegRoute.legs().get(0).distance();
      double distanceRemaining = multiLegRoute.distance();
      RouteProgress routeProgress = buildTestRouteProgress(multiLegRoute, stepDistanceRemaining,
        legDistanceRemaining, distanceRemaining, stepIndex, 0);
      float fractionRemaining = (float) (routeProgress.distanceTraveled() / multiLegRoute.distance());

      fractionsRemaining.add(fractionRemaining);
      routeProgressFractionsTraveled.add(routeProgress.fractionTraveled());
    }
  }

  assertTrue(fractionsRemaining.equals(routeProgressFractionsTraveled));
}
 

private String obtainRouteLegDescriptionFrom(DirectionsRoute route) {
  List<RouteLeg> routeLegs = route.legs();
  StringBuilder routeLegDescription = new StringBuilder();
  for (RouteLeg leg : routeLegs) {
    routeLegDescription.append(leg.summary());
  }
  return routeLegDescription.toString();
}
 

/**
 * The routes also display an icon for each waypoint in the route, we use symbol layers for this.
 */
private FeatureCollection waypointFeatureCollection(DirectionsRoute route) {
  final List<Feature> waypointFeatures = new ArrayList<>();
  for (RouteLeg leg : route.legs()) {
    waypointFeatures.add(getPointFromLineString(leg, 0));
    waypointFeatures.add(getPointFromLineString(leg, leg.steps().size() - 1));
  }
  return FeatureCollection.fromFeatures(waypointFeatures);
}
 

private boolean hasLegs(DirectionsRoute newRoute) {
  return newRoute.legs() != null && !newRoute.legs().isEmpty();
}