public Double exec()

in src/main/java/org/apache/datasketches/pig/tuple/DoubleSummarySketchToPercentile.java [52:72]

• 18 lines of code
• 4 McCabe index (conditional complexity)

  public Double exec(final Tuple input) throws IOException {
    if (input.size() != 2) {
      throw new IllegalArgumentException("expected two inputs: sketch and pecentile");
    }

    final DataByteArray dba = (DataByteArray) input.get(0);
    final Sketch<DoubleSummary> sketch = Sketches.heapifySketch(
        Memory.wrap(dba.get()), SUMMARY_DESERIALIZER);

    final double percentile = (double) input.get(1);
    if ((percentile < 0) || (percentile > 100)) {
      throw new IllegalArgumentException("percentile must be between 0 and 100");
    }

    final UpdateDoublesSketch qs = DoublesSketch.builder().setK(QUANTILES_SKETCH_SIZE).build();
    final SketchIterator<DoubleSummary> it = sketch.iterator();
    while (it.next()) {
      qs.update(it.getSummary().getValue());
    }
    return qs.getQuantile(percentile / 100);
  }