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Fix possible IndexOutOfBoundsException exception #1012

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Fix possible IndexOutOfBoundsException exception #1012

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7 changes: 5 additions & 2 deletions services-turf/src/main/java/com/mapbox/turf/TurfTransformation.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
package com.mapbox.turf;

import android.support.annotation.IntRange;
import android.support.annotation.NonNull;

import com.mapbox.geojson.Polygon;
Expand Down Expand Up @@ -62,14 +63,16 @@ public static Polygon circle(@NonNull Point center, double radius,
* @return a {@link Polygon} which represents the newly created circle
* @since 3.0.0
*/
public static Polygon circle(@NonNull Point center, double radius, int steps,
public static Polygon circle(@NonNull Point center, double radius, @IntRange(from=1) int steps,
@TurfConstants.TurfUnitCriteria String units) {
List<Point> coordinates = new ArrayList<>();
for (int i = 0; i < steps; i++) {
coordinates.add(TurfMeasurement.destination(center, radius, i * 360d / steps, units));
}
coordinates.add(coordinates.get(0));

if (coordinates.size() > 0) {
coordinates.add(coordinates.get(0));
}
List<List<Point>> coordinate = new ArrayList<>();
coordinate.add(coordinates);
return Polygon.fromLngLats(coordinate);
Expand Down