public static Iterator getIterator()

in src/main/java/org/apache/commons/collections4/IteratorUtils.java [885:928]
43 lines of code
14 McCabe index (conditional complexity)

    public static Iterator<?> getIterator(final Object obj) {
        if (obj == null) {
            return emptyIterator();
        }
        if (obj instanceof Iterator) {
            return (Iterator<?>) obj;
        }
        if (obj instanceof Iterable) {
            return ((Iterable<?>) obj).iterator();
        }
        if (obj instanceof Object[]) {
            return new ObjectArrayIterator<>((Object[]) obj);
        }
        if (obj instanceof Enumeration) {
            return new EnumerationIterator<>((Enumeration<?>) obj);
        }
        if (obj instanceof Map) {
            return ((Map<?, ?>) obj).values().iterator();
        }
        if (obj instanceof NodeList) {
            return new NodeListIterator((NodeList) obj);
        }
        if (obj instanceof Node) {
            return new NodeListIterator((Node) obj);
        }
        if (obj instanceof Dictionary) {
            return new EnumerationIterator<>(((Dictionary<?, ?>) obj).elements());
        }
        if (obj.getClass().isArray()) {
            return new ArrayIterator<>(obj);
        }
        try {
            final Method method = obj.getClass().getMethod("iterator", (Class[]) null);
            if (Iterator.class.isAssignableFrom(method.getReturnType())) {
                final Iterator<?> it = (Iterator<?>) method.invoke(obj, (Object[]) null);
                if (it != null) {
                    return it;
                }
            }
        } catch (final RuntimeException | ReflectiveOperationException ignore) { // NOPMD
            // ignore
        }
        return singletonIterator(obj);
    }