public Tuple exec()

in src/main/java/org/apache/datasketches/pig/kll/GetCdf.java [41:65]

• 23 lines of code
• 6 McCabe index (conditional complexity)

  public Tuple exec(final Tuple input) throws IOException {
    if (input.size() < 2) {
      throw new IllegalArgumentException(
          "expected two or more inputs: sketch and list of split points");
    }

    if (!(input.get(0) instanceof DataByteArray)) {
      throw new IllegalArgumentException("expected a DataByteArray as a sketch, got "
          + input.get(0).getClass().getSimpleName());
    }
    final DataByteArray dba = (DataByteArray) input.get(0);
    final KllFloatsSketch sketch = KllFloatsSketch.heapify(Memory.wrap(dba.get()));

    final float[] splitPoints = new float[input.size() - 1];
    for (int i = 1; i < input.size(); i++) {
      if (!(input.get(i) instanceof Float)) {
        throw new IllegalArgumentException("expected a float value as a split point, got "
            + input.get(i).getClass().getSimpleName());
      }
      splitPoints[i - 1] = (float) input.get(i);
    }
    final double[] cdf = sketch.getCDF(splitPoints);
    if (cdf == null) { return null; }
    return GetPmf.doubleArrayToTuple(cdf);
  }