public Double apply()

in src/main/java/org/apache/commons/text/similarity/JaccardSimilarity.java [69:93]

• 25 lines of code
• 9 McCabe index (conditional complexity)

    public <E> Double apply(final SimilarityInput<E> left, final SimilarityInput<E> right) {
        if (left == null || right == null) {
            throw new IllegalArgumentException("Input cannot be null");
        }
        final int leftLength = left.length();
        final int rightLength = right.length();
        if (leftLength == 0 && rightLength == 0) {
            return 1d;
        }
        if (leftLength == 0 || rightLength == 0) {
            return 0d;
        }
        final Set<E> leftSet = new HashSet<>();
        for (int i = 0; i < leftLength; i++) {
            leftSet.add(left.at(i));
        }
        final Set<E> rightSet = new HashSet<>();
        for (int i = 0; i < rightLength; i++) {
            rightSet.add(right.at(i));
        }
        final Set<E> unionSet = new HashSet<>(leftSet);
        unionSet.addAll(rightSet);
        final int intersectionSize = leftSet.size() + rightSet.size() - unionSet.size();
        return 1.0d * intersectionSize / unionSet.size();
    }