public ConcurrentWeakKeyHashMap()

in bytekit-core/src/main/java/com/alibaba/bytekit/utils/concurrent/ConcurrentWeakKeyHashMap.java [656:692]

• 32 lines of code
• 10 McCabe index (conditional complexity)

    public ConcurrentWeakKeyHashMap(
            int initialCapacity, float loadFactor, int concurrencyLevel) {
        if (!(loadFactor > 0) || initialCapacity < 0 || concurrencyLevel <= 0) {
            throw new IllegalArgumentException();
        }

        if (concurrencyLevel > MAX_SEGMENTS) {
            concurrencyLevel = MAX_SEGMENTS;
        }

        // Find power-of-two sizes best matching arguments
        int sshift = 0;
        int ssize = 1;
        while (ssize < concurrencyLevel) {
            ++ sshift;
            ssize <<= 1;
        }
        segmentShift = 32 - sshift;
        segmentMask = ssize - 1;
        segments = Segment.newArray(ssize);

        if (initialCapacity > MAXIMUM_CAPACITY) {
            initialCapacity = MAXIMUM_CAPACITY;
        }
        int c = initialCapacity / ssize;
        if (c * ssize < initialCapacity) {
            ++ c;
        }
        int cap = 1;
        while (cap < c) {
            cap <<= 1;
        }

        for (int i = 0; i < segments.length; ++ i) {
            segments[i] = new Segment<K, V>(cap, loadFactor);
        }
    }