如何在复合PK中使用@JsonIdentityInfo？ [英] How to use @JsonIdentityInfo with composite PK?

问题描述

如果我的班级有一个 @Id 字段，我可以使用 @JsonIdentityInfo 这样：

If I have a class with a single @Id field I can use @JsonIdentityInfo like this:

@Entity
@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
class Example {

    @Id
    int id;
    // getter setter
}

但是如果我有一个复合PK类：

But if I have a composite PK class:

@Entity
@IdClass(value = PointID.class)
public class Point {

    @Id
    private int x;
    @Id
    private int y;
}

@SuppressWarnings("serial")
class PointID  implements Serializable {
    int x, y;
}

如何使用注释？在上面的例子中，用法将是这样的

How do I use the annotation? In the above case the usage will be something like this

Point p = new Point(1,1);
object1.setPoint(p);
object2.setPoint(p);
bigObject.add(object1, object2);

当我序列化 bigObject 我不知道我想重复点数据但是使用它的id与第一个例子一样。

and when I serialize bigObject I don't want to duplciate the point data but use its id like it does with the first example.

推荐答案

似乎<$ c根据我的尝试和在线研究，$ c> @JsonIdentityInfo 不适用于复合PK。

It seems that @JsonIdentityInfo does not work with composite PK according to my attempts and online research.

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