public Optional combine()

in modules/core/src/main/java/org/apache/fluo/recipes/core/combine/SummingCombiner.java [28:35]

• 7 lines of code
• 3 McCabe index (conditional complexity)

  public Optional<Long> combine(Input<K, Long> input) {
    long sum = 0;
    for (Long l : input) {
      sum += l;
    }

    return sum == 0 ? Optional.empty() : Optional.of(sum);
  }