Java 类com.beust.jcommander.ParametersDelegate 实例源码

private static void printConfig(Class configClass) throws IllegalAccessException, InstantiationException {
    Field[] fields = configClass.getDeclaredFields();
    System.out.println();
    System.out.println("### " + configClass.getSimpleName());
    System.out.println();
    Object defaultConfig = configClass.newInstance();

    System.out.println("|Name|Default|Description|");
    System.out.println("|---|---|---|");
    try {
        for (Field field : fields) {
            field.setAccessible(true);
            StringBuilder sb = new StringBuilder();
            sb.append("|");
            Parameter param = field.getDeclaredAnnotation(Parameter.class);

            if (param != null) {
                String names = Stream.of(param.names())
                        .collect(Collectors.joining(", "));
                // name
                sb.append(names).append("|");

                // default
                sb.append(param.required() ? "**required**" : field.get(defaultConfig) + " ").append("|");

                // description
                sb.append(param.description()).append("|");

                System.out.println(sb.toString());
            }

            ParametersDelegate delegate = field.getDeclaredAnnotation(ParametersDelegate.class);

            if (delegate != null) {
                printConfig(field.getType());
            }
        }
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}