public int tokenize()

in pgjdbc/src/main/java/org/postgresql/util/PGtokenizer.java [64:130]
45 lines of code
26 McCabe index (conditional complexity)

  public int tokenize(String string, char delim) {
    tokens.clear();

    final Deque<Character> stack = new ArrayDeque<>();

    // stack keeps track of the levels we are in the current token.
    // if stack.size is > 0 then we don't split a token when delim is matched.
    //
    // The Geometric datatypes use this, because often a type may have others
    // (usually PGpoint) embedded within a token.
    //
    // Peter 1998 Jan 6 - Added < and > to the nesting rules
    int p;
    int s;
    boolean skipChar = false;
    boolean nestedDoubleQuote = false;
    char c = (char)0;
    for (p = 0, s = 0; p < string.length(); p++) {
      c = string.charAt(p);

      // increase nesting if an open character is found
      if (c == '(' || c == '[' || c == '<' || (!nestedDoubleQuote && !skipChar && c == '"')) {
        stack.push(c);
        if (c == '"') {
          nestedDoubleQuote = true;
          skipChar = true;
        }
      }

      // decrease nesting if a close character is found
      if (c == ')' || c == ']' || c == '>' || (nestedDoubleQuote && !skipChar && c == '"')) {

        if (c == '"') {
          while (!stack.isEmpty() && !Character.valueOf('"').equals(stack.peek())) {
            stack.pop();
          }
          nestedDoubleQuote = false;
          stack.pop();
        } else {
          final Character ch = CLOSING_TO_OPENING_CHARACTER.get(c);
          if (!stack.isEmpty() && ch != null && ch.equals(stack.peek())) {
            stack.pop();
          }
        }
      }

      skipChar = c == '\\';

      if (stack.isEmpty() && c == delim) {
        tokens.add(string.substring(s, p));
        s = p + 1; // +1 to skip the delimiter
      }

    }

    // Don't forget the last token ;-)
    if (s < string.length()) {
      tokens.add(string.substring(s));
    }

    // check for last token empty
    if ( s == string.length() && c == delim) {
      tokens.add("");
    }

    return tokens.size();
  }