Method putInverse

corpus/java/training/guava/collect/HashBiMap.java:304–336

(@Nullable V value, @Nullable K key, boolean force)

  }

  @Nullable
  private K putInverse(@Nullable V value, @Nullable K key, boolean force) {
    int valueHash = smearedHash(value);
    int keyHash = smearedHash(key);

    BiEntry<K, V> oldEntryForValue = seekByValue(value, valueHash);
    if (oldEntryForValue != null
        && keyHash == oldEntryForValue.keyHash
        && Objects.equal(key, oldEntryForValue.key)) {
      return key;
    }

    BiEntry<K, V> oldEntryForKey = seekByKey(key, keyHash);
    if (oldEntryForKey != null) {
      if (force) {
        delete(oldEntryForKey);
      } else {
        throw new IllegalArgumentException("value already present: " + key);
      }
    }

    if (oldEntryForValue != null) {
      delete(oldEntryForValue);
    }
    BiEntry<K, V> newEntry = new BiEntry<K, V>(key, keyHash, value, valueHash);
    insert(newEntry, oldEntryForKey);
    if (oldEntryForKey != null) {
      oldEntryForKey.prevInKeyInsertionOrder = null;
      oldEntryForKey.nextInKeyInsertionOrder = null;
    }
    rehashIfNecessary();
    return Maps.keyOrNull(oldEntryForValue);
  }

  private void rehashIfNecessary() {
    BiEntry<K, V>[] oldKToV = hashTableKToV;