private static List merge()

in nlpcraft/src/main/scala/org/apache/nlpcraft/internal/impl/NCModelPipelineHelper.java [107:148]

• 31 lines of code
• 21 McCabe index (conditional complexity)

    private static List<Long> merge(List<Long> l1, List<Long> l2) {
        if (l1.isEmpty())
            return l2;
        else if (l2.isEmpty())
            return l1;

        int size1 = l1.size();
        int size2 = l2.size();

        if (size1 == 1 && size2 > 1 || size2 == 1 && size1 > 1) {
            // Minor optimization in case if one of the lists has only one element.
            List<Long> res = size1 == 1 ? l2 : l1;
            Long val = size1 == 1 ? l1.get(0) : l2.get(0);

            if (excludes(val, res))
                res.add(val);

            return res;
        }

        List<Long> res = new ArrayList<>(size1 + size2);

        for (int i = 0, max = Math.max(size1, size2); i < max; i++) {
            Long v1 = i < size1 ? l1.get(i) : null;
            Long v2 = i < size2 ? l2.get(i) : null;

            if (v1 != null && v2 != null) {
                if (containsAllBits(v1, v2))
                    v1 = null;
                else if (containsAllBits(v2, v1))
                    v2 = null;
            }

            if (v1 != null && excludes(v1, res))
                res.add(v1);

            if (v2 != null && excludes(v2, res))
                res.add(v2);
        }

        return res;
    }