Review

class ReflectionToStringBuilder {
    /**
     * Returns a new array of Strings without null elements. Internal method used to normalize exclude lists
     * (arrays and collections). Note that {@link Arrays#sort(Object[])} will throw an {@link NullPointerException} 
     * if an array element is <code>null</code>.
     * 
     * @param array
     *            The array to check
     * @return The given array or a new array without null.
     */
    static String[] toNoNullStringArray(Object[] array) {
        ArrayList list = new ArrayList(array.length);
        for (int i = 0; i < array.length; i++) {
            Object e = array[i];
            if (e != null) {
                list.add(e.toString());
            }
        }
        return (String[]) list.toArray(ArrayUtils.EMPTY_STRING_ARRAY);
    }

}