private static Object opValues()

in metrics/src/main/java/com/facebook/battery/metrics/healthstats/HealthStatsMetrics.java [229:261]

• 27 lines of code
• 8 McCabe index (conditional complexity)

  private static <V> Object opValues(int op, V a, @Nullable V b) {
    if (a instanceof Long) {
      return (Long) a + (b == null ? 0 : (op * (Long) b));
    }

    if (a instanceof TimerMetrics) {
      TimerMetrics timerMetricsA = (TimerMetrics) a;
      TimerMetrics timerMetricsB = (TimerMetrics) b;

      if (b == null) {
        return new TimerMetrics(timerMetricsA);
      }

      TimerMetrics timerMetrics = new TimerMetrics();
      timerMetrics.count = timerMetricsA.count + op * timerMetricsB.count;
      timerMetrics.timeMs = timerMetricsA.timeMs + op * timerMetricsB.timeMs;
      return timerMetrics;
    }

    if (a instanceof HealthStatsMetrics) {
      if (op == OP_SUM) {
        return ((HealthStatsMetrics) a).sum((HealthStatsMetrics) b, null);
      } else {
        return ((HealthStatsMetrics) a).diff((HealthStatsMetrics) b, null);
      }
    }

    if (a instanceof ArrayMap) {
      return opArrayMaps(op, (ArrayMap) a, (ArrayMap) b);
    }

    throw new IllegalArgumentException("Handling unsupported values");
  }