public ReqSketch merge()

in src/main/java/org/apache/datasketches/req/ReqSketch.java [379:403]

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

  public ReqSketch merge(final ReqSketch other) {
    if (other == null || other.isEmpty()) { return this; }
    if (other.hra != hra) {
      throw new SketchesArgumentException(
          "Both sketches must have the same HighRankAccuracy setting.");
    }
    totalN += other.totalN;
    //update min, max items, n
    if (Float.isNaN(minItem) || other.minItem < minItem) { minItem = other.minItem; }
    if (Float.isNaN(maxItem) || other.maxItem > maxItem) { maxItem = other.maxItem; }
    //Grow until self has at least as many compactors as other
    while (getNumLevels() < other.getNumLevels()) { grow(); }
    //Merge the items in all height compactors
    for (int i = 0; i < other.getNumLevels(); i++) {
      compactors.get(i).merge(other.compactors.get(i));
    }
    maxNomSize = computeMaxNomSize();
    retItems = computeTotalRetainedItems();
    if (retItems >= maxNomSize) {
      compress();
    }
    assert retItems < maxNomSize;
    reqSV = null;
    return this;
  }