domain.java

// Domain

@Data
@Builder
public class Order {
    private Product product;
    private ShippingHistory shippingHistory;
    private Payment payment;
}


@Data
@Builder
public class Payment {
    private String status;
}


@Entity
@NoArgsConstructor
@Getter
@Setter
@Builder
@AllArgsConstructor
public class Product implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @NotBlank(message = "Product name is mandatory")
    private String name;

    private String description;

    @NotBlank(message = "Product price is mandatory")
    private Double price;
}


@Data
@Builder
public class ShippingHistory {
    private String lastStatus;
}