richardstartin commented on code in PR #8498:
URL: https://github.com/apache/pinot/pull/8498#discussion_r846627000
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/H3Utils.java:
##########
@@ -35,4 +51,50 @@ private H3Utils() {
throw new RuntimeException("Failed to instantiate H3 instance", e);
}
}
+
+ private static Set<Long> coverLineInH3(LineString lineString, int
resolution) {
+ Set<Long> coveringH3Cells = new HashSet<>();
+ List<Long> endpointH3Cells = new ArrayList<>();
+ for (Coordinate endpoint : lineString.getCoordinates()) {
+ endpointH3Cells.add(H3_CORE.geoToH3(endpoint.y, endpoint.x, resolution));
+ }
+ for (int i = 0; i < endpointH3Cells.size() - 1; i++) {
+ try {
+ coveringH3Cells.addAll(H3_CORE.h3Line(endpointH3Cells.get(i),
endpointH3Cells.get(i + 1)));
+ } catch (LineUndefinedException e) {
+ throw new RuntimeException(e);
+ }
+ }
+ return coveringH3Cells;
+ }
Review Comment:
Boxing here is unfortunate, use `LongSet` instead.
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