Method setCountImpl

output/java_guava/1.4.17/Multisets.java:940–950

An implementation of Multiset#setCount(Object, int).

(Multiset<E> self, E element, int count)

   */

  static <E> int setCountImpl(Multiset<E> self, E element, int count) {
    checkNonnegative(count, "count");
    int oldCount = self.count(element);
    int delta = count - oldCount;
    if (delta > 0) {
      self.add(element, delta);
    } else if (delta < 0) {
      self.remove(element, -delta);
    }
    return oldCount;
  }

  /**
   * An implementation of {@link Multiset#setCount(Object, int, int)}.