Question

我正在使用resteasy jakson提供3.0.17，这是我的对象结构。

@SuppressWarnings("serial")
@Entity
@Getter
@Setter
@EqualsAndHashCode
@NoArgsConstructor
@AllArgsConstructor
@JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class,
        property = "@id")
public class Product implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "id_seq")
    @SequenceGenerator(name = "id_seq", sequenceName = "id_seq")
    private Long productId;

    @Basic
    private String productName;

    @Basic
    private String type;

    @Basic
    private String productCode;

    @Basic
    private String outputName;

    @Basic
    private String creationMethod;

    @LazyCollection(LazyCollectionOption.FALSE)
    @OneToMany(mappedBy = "primaryKey.product")
    @JsonManagedReference
    private Set<ProductDataElement> productDataElements = new HashSet<>();
}

@SuppressWarnings("serial")
@Entity
@Table(schema = "product", name = "productdataelement")
// To cater to additional column in the mapping table
@AssociationOverrides({
        @AssociationOverride(name = "primaryKey.product", joinColumns = @JoinColumn(name = "productId")),
        @AssociationOverride(name = "primaryKey.dataElement", joinColumns = @JoinColumn(name = "dataElementId")),
})
@Setter
public class ProductDataElement implements Serializable {
    @EmbeddedId
    @JsonUnwrapped
    private ProductDataElementId primaryKey;

    @Basic
    private Long rowLimit;
}

@SuppressWarnings("serial")
@Getter
@Setter
@EqualsAndHashCode
@NoArgsConstructor
@AllArgsConstructor
@Embeddable
public class ProductDataElementId implements Serializable {

    @JsonBackReference
    @ManyToOne(cascade = CascadeType.ALL)
    private Product product;

    @JsonBackReference
    @ManyToOne(cascade = CascadeType.ALL)
    private DataElement dataElement;

}

当我为特定产品执行JPA查询时，我在服务器端获得包含productDataElements集合的嵌套结构，但是当这些数据通过REST webservice调用发送到浏览器时，我获得了具有空对象的集合ProductDataElement对象。任何线索可以获得完整对象的可能解决方案？

Answer 1

现在解决了..

我不得不加入

@JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class,
        property = "@id")

在ProductDataElementId和ProductDataElement上使其正常工作。

Jackson 3.0无法使用@EmbededId序列化对象

1 个答案: