我有课

@Data
public class ScreenshotInput extends InputModel implements Serializable {
  private static final long serialVersionUID = 1L;

  private final byte[] image;
  private final Timestamp timeCreated;

  public ScreenshotInput(byte[] image, String taskName, Timestamp timestamp) {
    super(taskName);
    this.image = image;
    this.timeCreated = timestamp;
  }
}

以及我的抽象inputmodel类：

@Data
public abstract class InputModel {
  private String taskName;
  private String userName;

  public InputModel(String taskName) {
    this.taskName = taskName;
    this.userName = Preferences.userRoot().get("username", "username");
  }
}

当我想保存创建的对象screenshotinput时，只有screenshotinput类中定义的值被保存到我的对象：image和timestamp。值taskname和username是可用的（例如，当我想在将对象保存到桩上之前打印它时），但它们不在桩上的对象中。默认情况下，如何将inputmodel中的变量写入对象？