static List parseOptionString()

in client/migrationx/migrationx-transformer/src/main/java/com/aliyun/dataworks/migrationx/transformer/core/spark/command/CommandBuilderUtils.java [136:217]
78 lines of code
20 McCabe index (conditional complexity)

    static List<String> parseOptionString(String s) {
        List<String> opts = new ArrayList<>();
        StringBuilder opt = new StringBuilder();
        boolean inOpt = false;
        boolean inSingleQuote = false;
        boolean inDoubleQuote = false;
        boolean escapeNext = false;

        // This is needed to detect when a quoted empty string is used as an argument ("" or '').
        boolean hasData = false;

        for (int i = 0; i < s.length(); i++) {
            int c = s.codePointAt(i);
            if (escapeNext) {
                opt.appendCodePoint(c);
                escapeNext = false;
            } else if (inOpt) {
                switch (c) {
                    case '\\':
                        if (inSingleQuote) {
                            opt.appendCodePoint(c);
                        } else {
                            escapeNext = true;
                        }
                        break;
                    case '\'':
                        if (inDoubleQuote) {
                            opt.appendCodePoint(c);
                        } else {
                            inSingleQuote = !inSingleQuote;
                        }
                        break;
                    case '"':
                        if (inSingleQuote) {
                            opt.appendCodePoint(c);
                        } else {
                            inDoubleQuote = !inDoubleQuote;
                        }
                        break;
                    default:
                        if (!Character.isWhitespace(c) || inSingleQuote || inDoubleQuote) {
                            opt.appendCodePoint(c);
                        } else {
                            opts.add(opt.toString());
                            opt.setLength(0);
                            inOpt = false;
                            hasData = false;
                        }
                }
            } else {
                switch (c) {
                    case '\'':
                        inSingleQuote = true;
                        inOpt = true;
                        hasData = true;
                        break;
                    case '"':
                        inDoubleQuote = true;
                        inOpt = true;
                        hasData = true;
                        break;
                    case '\\':
                        escapeNext = true;
                        inOpt = true;
                        hasData = true;
                        break;
                    default:
                        if (!Character.isWhitespace(c)) {
                            inOpt = true;
                            hasData = true;
                            opt.appendCodePoint(c);
                        }
                }
            }
        }

        checkArgument(!inSingleQuote && !inDoubleQuote && !escapeNext, "Invalid option string: %s", s);
        if (hasData) {
            opts.add(opt.toString());
        }
        return opts;
    }