Review

class ArrayUtils {
    /**
     * <p>Inserts the specified element at the specified position in the array. 
     * Shifts the element currently at that position (if any) and any subsequent
     * elements to the right (adds one to their indices).</p>
     *
     * <p>This method returns a new array with the same elements of the input
     * array plus the given element on the specified position. The component 
     * type of the returned array is always the same as that of the input 
     * array.</p>
     *
     * <p>If the input array is <code>null</code>, a new one element array is returned
     *  whose component type is the same as the element.</p>
     * 
     * <pre>
     * ArrayUtils.add(null, 0, true)          = [true]
     * ArrayUtils.add([true], 0, false)       = [false, true]
     * ArrayUtils.add([false], 1, true)       = [false, true]
     * ArrayUtils.add([true, false], 1, true) = [true, true, false]
     * </pre>
     * 
     * @param array  the array to add the element to, may be <code>null</code>
     * @param index  the position of the new object
     * @param element  the object to add
     * @return A new array containing the existing elements and the new element
     * @throws IndexOutOfBoundsException if the index is out of range 
     * (index < 0 || index > array.length).
     */
    public static boolean[] add(boolean[] array, int index, boolean element) {
        return (boolean[]) add( array, index, BooleanUtils.toBooleanObject(element), Boolean.TYPE );
    }

}