(dirty) Pretty print lombok object string

PrettyPrintLombokString.java

/**
 * Basic error-prone function for prettifying (formatting) a lombok @ToString output
 * Fails for data containing [](),=
 * Can be improved by adding lookarounds from each switch-case (checking for '=' behind)
 * Replace me with objectmapper and json + jsonprettyprint?
 *
 * @param str a string generated by lombok @ToString
 * @return pretty formatted lombok object
 */
private static String prettyPrintLombokToString(String str) {
    final int INDENT_UNIT = 4;
    StringBuilder output = new StringBuilder();
    var indent = 0;
    for (var i = 0; i < str.length(); i++) {
        switch (str.charAt(i)) {
            case '[':
                indent += INDENT_UNIT;
                output.append("[\n");
                output.append(" ".repeat(indent));
                break;
            case ']':
                indent -= INDENT_UNIT;
                output.append("\n");
                output.append(" ".repeat(indent));
                output.append("]");
                break;
            case ',':
                output.append("\n");
                output.append(" ".repeat(indent));
                output.append(",");
                break;
            case '(':
                indent += INDENT_UNIT;
                output.append("(\n");
                output.append(" ".repeat(indent));
                break;
            case ')':
                indent -= INDENT_UNIT;
                output.append("\n");
                output.append(" ".repeat(indent));
                output.append(")");
                break;
            default:
                output.append(str.charAt(i));
        }
    }

    return output.toString();
}