Method split

solr/solrj/src/java/org/apache/solr/common/util/StrUtils.java:45–50

(String s, char sep)

  static final String DELIM_CHARS = "/:;.,%#";

  public static List<String> split(String s, char sep) {
    if (DELIM_CHARS.indexOf(s.charAt(0)) > -1) {
      sep = s.charAt(0);
    }
    return splitSmart(s, sep, true);
  }

  public static List<String> splitSmart(String s, char separator, boolean trimEmpty) {
    List<String> l = splitSmart(s, separator);