static Object removeAll()

in src/main/java/org/apache/commons/lang3/ArrayUtils.java [5348:5391]

• 41 lines of code
• 11 McCabe index (conditional complexity)

    static Object removeAll(final Object array, final int... indices) {
        if (array == null) {
            return null;
        }
        final int length = getLength(array);
        int diff = 0; // number of distinct indexes, i.e. number of entries that will be removed
        final int[] clonedIndices = ArraySorter.sort(clone(indices));
        // identify length of result array
        if (isNotEmpty(clonedIndices)) {
            int i = clonedIndices.length;
            int prevIndex = length;
            while (--i >= 0) {
                final int index = clonedIndices[i];
                if (index < 0 || index >= length) {
                    throw new IndexOutOfBoundsException("Index: " + index + ", Length: " + length);
                }
                if (index >= prevIndex) {
                    continue;
                }
                diff++;
                prevIndex = index;
            }
        }
        // create result array
        final Object result = Array.newInstance(array.getClass().getComponentType(), length - diff);
        if (diff < length && clonedIndices != null) {
            int end = length; // index just after last copy
            int dest = length - diff; // number of entries so far not copied
            for (int i = clonedIndices.length - 1; i >= 0; i--) {
                final int index = clonedIndices[i];
                if (end - index > 1) { // same as (cp > 0)
                    final int cp = end - index - 1;
                    dest -= cp;
                    System.arraycopy(array, index + 1, result, dest, cp);
                    // After this copy, we still have room for dest items.
                }
                end = index;
            }
            if (end > 0) {
                System.arraycopy(array, 0, result, 0, end);
            }
        }
        return result;
    }