Java 14 records with org.json

Question

I wanted to make new JSON object with org.json library, but I have noticed there is a problem with Java 14 records.

When I call

String json = new JSONObject(new Order("", "Albert", "GOOGL", "SELL", 97.9, 90L)).toString();

the fields are null.

I suppose it is because java record doesn't use old getters like getXYZ?

Is there a simple work around? I mean without using different library. Or maybe my assumptions are incorrect.

public record Order(
    String id,
    String userId,
    String securityId,
    String type,
    Double price,
    Long quantity
) {
}

<dependency>
    <groupId>org.json</groupId>
    <artifactId>json</artifactId>
    <version>20220320</version>
</dependency>

Answer 1

If you don't want to use other libraries like Jackson or Gson (it will be a much better solution in my opinion) you could write your own converter:

public final class JsonConverter {

    private JsonConverter() {
    }
    
    @SneakyThrows
    public static String toJSON(Object object) {
        Class<?> c = object.getClass();
        JSONObject jsonObject = new JSONObject();
        for (Field field : c.getDeclaredFields()) {
            field.setAccessible(true);
            String name = field.getName();
            Object value = field.get(object);
            jsonObject.put(name, value);
        }
        return jsonObject.toString();
    }
}

You could use it like:

public static void main(String[] args) {
    Order order = new Order("", "Albert", "GOOGL", "SELL", 97.9, 90L);
    System.out.println(order);

    JSONObject jsonObject = new JSONObject(order);
    System.out.println(jsonObject.toString());

    System.out.println(JsonConverter.toJSON(order));
}

Output:

OrderRecord[id=, userId=Albert, securityId=GOOGL, type=SELL, price=97.9, quantity=90]
{}
{"quantity":90,"price":97.9,"securityId":"GOOGL","id":"","type":"SELL","userId":"Albert"}

It is a real workaround. However, it uses exactly org.json.