public static Map putAll()

in src/main/java/org/apache/commons/collections4/MapUtils.java [1656:1690]

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

    public static <K, V> Map<K, V> putAll(final Map<K, V> map, final Object[] array) {
        Objects.requireNonNull(map, "map");
        if (array == null || array.length == 0) {
            return map;
        }
        final Object obj = array[0];
        if (obj instanceof Map.Entry) {
            for (final Object element : array) {
                // cast ok here, type is checked above
                final Map.Entry<K, V> entry = (Map.Entry<K, V>) element;
                map.put(entry.getKey(), entry.getValue());
            }
        } else if (obj instanceof KeyValue) {
            for (final Object element : array) {
                // cast ok here, type is checked above
                final KeyValue<K, V> keyval = (KeyValue<K, V>) element;
                map.put(keyval.getKey(), keyval.getValue());
            }
        } else if (obj instanceof Object[]) {
            for (int i = 0; i < array.length; i++) {
                final Object[] sub = (Object[]) array[i];
                if (sub == null || sub.length < 2) {
                    throw new IllegalArgumentException("Invalid array element: " + i);
                }
                // these casts can fail if array has incorrect types
                map.put((K) sub[0], (V) sub[1]);
            }
        } else {
            for (int i = 0; i < array.length - 1;) {
                // these casts can fail if array has incorrect types
                map.put((K) array[i++], (V) array[i++]);
            }
        }
        return map;
    }