Fix test problem

apache · Dec 25, 2023 · a0e833e · a0e833e
1 parent 0521a13
commit a0e833e
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java b/src/main/java/org/apache/datasketches/kll/KllDoublesSketch.java
@@ -276,8 +276,9 @@ public QuantilesDoublesSketchIterator iterator() {
   @Override
   public final void merge(final KllSketch other) {
     if (readOnly || sketchStructure != UPDATABLE) { throw new SketchesArgumentException(TGT_IS_READ_ONLY_MSG); }
-    if (other.isEmpty()) { return; }
-    KllDoublesHelper.mergeDoubleImpl(this, (KllDoublesSketch)other);
+    final KllDoublesSketch othDblSk = (KllDoublesSketch)other; //check cast first
+    if (othDblSk.isEmpty()) { return; } //then check empty
+    KllDoublesHelper.mergeDoubleImpl(this, othDblSk);
     kllDoublesSV = null;
   }