public BytesWritable evaluate()

in src/main/java/org/apache/datasketches/hive/theta/ExcludeSketchUDF.java [60:78]

• 16 lines of code
• 5 McCabe index (conditional complexity)

  public BytesWritable evaluate(final BytesWritable firstSketchBytes,
      final BytesWritable secondSketchBytes, final long hashSeed) {

    Sketch firstSketch = null;
    if (firstSketchBytes != null && firstSketchBytes.getLength() > 0) {
      firstSketch = Sketch.wrap(BytesWritableHelper.wrapAsMemory(firstSketchBytes), hashSeed);
    }

    Sketch secondSketch = null;
    if (secondSketchBytes != null && secondSketchBytes.getLength() > 0) {
      secondSketch = Sketch.wrap(BytesWritableHelper.wrapAsMemory(secondSketchBytes), hashSeed);
    }

    final AnotB anotb = SetOperation.builder().setSeed(hashSeed).buildANotB();
    final byte[] excludeSketchBytes = anotb.aNotB(firstSketch, secondSketch).toByteArray();
    final BytesWritable result = new BytesWritable();
    result.set(excludeSketchBytes, 0, excludeSketchBytes.length);
    return result;
  }