public static boolean exactlyEqual()

in src/main/java/org/apache/datasketches/theta/JaccardSimilarity.java [106:133]

• 22 lines of code
• 12 McCabe index (conditional complexity)

  public static boolean exactlyEqual(final Sketch sketchA, final Sketch sketchB) {
    //Corner case checks
    if (sketchA == null || sketchB == null) { return false; }
    if (sketchA == sketchB) { return true; }
    if (sketchA.isEmpty() && sketchB.isEmpty()) { return true; }
    if (sketchA.isEmpty() || sketchB.isEmpty()) { return false; }

    final int countA = sketchA.getRetainedEntries(true);
    final int countB = sketchB.getRetainedEntries(true);

    //Create the Union
    final Union union =
        SetOperation.builder().setNominalEntries(ceilingPowerOf2(countA + countB)).buildUnion();
    union.union(sketchA);
    union.union(sketchB);
    final Sketch unionAB = union.getResult();
    final long thetaLongUAB = unionAB.getThetaLong();
    final long thetaLongA = sketchA.getThetaLong();
    final long thetaLongB = sketchB.getThetaLong();
    final int countUAB = unionAB.getRetainedEntries(true);

    //Check for identical counts and thetas
    if (countUAB == countA && countUAB == countB
        && thetaLongUAB == thetaLongA && thetaLongUAB == thetaLongB) {
      return true;
    }
    return false;
  }