Polishing.

Reformat code.

See #4004
Original pull request: #4006.

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/CountQuery.java

@@ -38,7 +38,7 @@
  */
 class CountQuery {
 
-	private Document source;
+	private final Document source;
 
 	private CountQuery(Document source) {
 		this.source = source;
@@ -101,7 +101,7 @@ private boolean requiresRewrite(Object valueToInspect) {
 		}
 
 		if (valueToInspect instanceof Collection) {
-			return requiresRewrite((Collection) valueToInspect);
+			return requiresRewrite((Collection<?>) valueToInspect);
 		}
 
 		return false;
@@ -157,6 +157,7 @@ private Collection<Object> rewriteCollection(Collection<?> source) {
 	 * @param $and potentially existing {@code $and} condition.
 	 * @return the rewritten query {@link Document}.
 	 */
+	@SuppressWarnings("unchecked")
 	private static Document createGeoWithin(String key, Document source, @Nullable Object $and) {
 
 		boolean spheric = source.containsKey("$nearSphere");
@@ -181,7 +182,7 @@ private static Document createGeoWithin(String key, Document source, @Nullable O
 
 		if ($and != null) {
 			if ($and instanceof Collection) {
-				Collection andElements = (Collection) $and;
+				Collection<Document> andElements = (Collection<Document>) $and;
 				criteria = new ArrayList<>(andElements.size() + 2);
 				criteria.addAll(andElements);
 			} else {
@@ -195,24 +196,32 @@ private static Document createGeoWithin(String key, Document source, @Nullable O
 
 		criteria.add(new Document("$nor", Collections.singletonList(new Document(key, $geoWithinMin))));
 		criteria.add(new Document(key, $geoWithinMax));
+
 		return new Document("$and", criteria);
 	}
 
 	private static Number getMaxDistance(Document source, Object $near, boolean spheric) {
 
 		Number maxDistance = Double.MAX_VALUE;
-		if(source.containsKey("$maxDistance")) { // legacy coordinate pair
-			maxDistance = (Number) source.get("$maxDistance");
-		} else if ($near instanceof Document) {
-			Document nearDoc = (Document)$near;
-			if(nearDoc.containsKey("$maxDistance")) {
+
+		if (source.containsKey("$maxDistance")) { // legacy coordinate pair
+			return (Number) source.get("$maxDistance");
+		}
+
+		if ($near instanceof Document) {
+
+			Document nearDoc = (Document) $near;
+
+			if (nearDoc.containsKey("$maxDistance")) {
+
 				maxDistance = (Number) nearDoc.get("$maxDistance");
 				// geojson is in Meters but we need radians x/(6378.1*1000)
-				if(spheric && nearDoc.containsKey("$geometry")) {
+				if (spheric && nearDoc.containsKey("$geometry")) {
 					maxDistance = MetricConversion.metersToRadians(maxDistance.doubleValue());
 				}
 			}
 		}
+
 		return maxDistance;
 	}
 
@@ -239,13 +248,14 @@ private static Object toCenterCoordinates(Object value) {
 			return Arrays.asList(((Point) value).getX(), ((Point) value).getY());
 		}
 
-		if (value instanceof Document ) {
+		if (value instanceof Document) {
 			Document document = (Document) value;
-			if(document.containsKey("x")) {
-				Document point = document;
-				return Arrays.asList(point.get("x"), point.get("y"));
+
+			if (document.containsKey("x")) {
+				return Arrays.asList(document.get("x"), document.get("y"));
 			}
-			else if (document.containsKey("$geometry")) {
+
+			if (document.containsKey("$geometry")) {
 				Document geoJsonPoint = document.get("$geometry", Document.class);
 				return geoJsonPoint.get("coordinates");
 			}

spring-data-mongodb/src/main/java/org/springframework/data/mongodb/core/query/MetricConversion.java

@@ -67,8 +67,8 @@ public static double getDistanceInMeters(Distance distance) {
 	 * Return {@code distance} in radians (on an earth like sphere).
 	 *
 	 * @param distance must not be {@literal null}.
-	 * @return distance in rads.
-	 * @since 3.4
+	 * @return distance in radians.
+	 * @since 3.4.4
 	 */
 	public static double toRadians(Distance distance) {
 		return metersToRadians(getDistanceInMeters(distance));
@@ -78,8 +78,8 @@ public static double toRadians(Distance distance) {
 	 * Return {@code distance} in radians (on an earth like sphere).
 	 *
 	 * @param meters
-	 * @return distance in rads.
-	 * @since 3.4
+	 * @return distance in radians.
+	 * @since 3.4.4
 	 */
 	public static double metersToRadians(double meters) {
 		return BigDecimal.valueOf(meters).divide(METERS_MULTIPLIER, MathContext.DECIMAL64).doubleValue();