Review

class StringUtils {
    /**
     * <p>Splits the provided text into an array, separator string specified.</p>
     *
     * <p>The separator(s) will not be included in the returned String array.
     * Adjacent separators are treated as one separator.</p>
     *
     * <p>A <code>null</code> input String returns <code>null</code>.
     * A <code>null</code> separator splits on whitespace.</p>
     *
     * <pre>
     * StringUtils.splitByWholeSeparator(null, *)               = null
     * StringUtils.splitByWholeSeparator("", *)                 = []
     * StringUtils.splitByWholeSeparator("ab de fg", null)      = ["ab", "de", "fg"]
     * StringUtils.splitByWholeSeparator("ab   de fg", null)    = ["ab", "de", "fg"]
     * StringUtils.splitByWholeSeparator("ab:cd:ef", ":")       = ["ab", "cd", "ef"]
     * StringUtils.splitByWholeSeparator("ab-!-cd-!-ef", "-!-") = ["ab", "cd", "ef"]
     * </pre>
     *
     * @param str  the String to parse, may be null
     * @param separator  String containing the String to be used as a delimiter,
     *  <code>null</code> splits on whitespace
     * @return an array of parsed Strings, <code>null</code> if null String was input
     */
    public static String[] splitByWholeSeparator(String str, String separator) {
        return splitByWholeSeparatorWorker( str, separator, -1, false ) ;
    }

}