How to use

ConfigDef$Type

in

org.apache.kafka.common.config

protected String getConfigValue(ConfigKey key, String headerName) {
  switch (headerName) {
    case "Name":
      return key.name;
    case "Description":
      return key.documentation;
    case "Type":
      return key.type.toString().toLowerCase(Locale.ROOT);
    case "Default":
      if (key.hasDefault()) {
        if (key.defaultValue == null)
          return "null";
        String defaultValueStr = convertToString(key.defaultValue, key.type);
        if (defaultValueStr.isEmpty())
          return "\"\"";
        else
          return defaultValueStr;
      } else
        return "";
    case "Valid Values":
      return key.validator != null ? key.validator.toString() : "";
    case "Importance":
      return key.importance.toString().toLowerCase(Locale.ROOT);
    default:
      throw new RuntimeException("Can't find value for header '" + headerName + "' in " + key.name);
  }
}

 break;
case 2:
 length = null == def.type ? 0 : def.type.toString().length();
 break;
case 3:
 break;
case 2:
 value = def.type.toString().toLowerCase();
 break;
case 3:

b.append("</td>");
b.append("<td>");
b.append(def.type.toString().toLowerCase());
b.append("</td>");
b.append("<td>");

 break;
case 2:
 value = def.type.toString().toLowerCase();
 break;
case 3:

private static ConfigKeyInfo convertConfigKey(ConfigKey configKey) {
  String name = configKey.name;
  Type type = configKey.type;
  String typeName = configKey.type.name();
  boolean required = false;
  String defaultValue;
  if (ConfigDef.NO_DEFAULT_VALUE.equals(configKey.defaultValue)) {
    defaultValue = null;
    required = true;
  } else {
    defaultValue = ConfigDef.convertToString(configKey.defaultValue, type);
  }
  String importance = configKey.importance.name();
  String documentation = configKey.documentation;
  String group = configKey.group;
  int orderInGroup = configKey.orderInGroup;
  String width = configKey.width.name();
  String displayName = configKey.displayName;
  List<String> dependents = configKey.dependents;
  return new ConfigKeyInfo(name, typeName, required, defaultValue, importance, documentation, group, orderInGroup, width, displayName, dependents);
}