EntityX export json

EntityX.java

public JSONObject exportToJson() throws Exception{
    JSONObject outputJsonObject = new JSONObject();

    for (Field field : this.getClass().getDeclaredFields()) {
        String fieldName = field.getName();
        if (fields.containsKey(fieldName)) {
            field.setAccessible(true);
            EntityMetaData t = fields.get(fieldName);
            Object fieldValue = field.get(this);
            if (fieldValue != null) {
                if (t.isArray) {
                    Iterable iterable = (Iterable) fieldValue;
                    JSONArray array = new JSONArray();
                    if (t.isDerivedFromEntity) {
                        for (Object curr : iterable) {
                            array.put(((EntityX) curr).exportToJson());
                        }
                    } else {
                        for (Object curr : iterable) {
                            array.put(curr);
                        }
                    }
                    outputJsonObject.put(t.key, array);
                } else {
                    if (t.isDerivedFromEntity) {
                        outputJsonObject.put(t.key, ((EntityX) fieldValue).exportToJson());
                    } else {
                        outputJsonObject.put(t.key, fieldValue);
                    }
                }
            }
        }
    }
    return outputJsonObject;
}