如何创建一组杰克逊注释注释？ [英] How to create an annotation that is a group of Jackson annotations?

问题描述

我读了一篇文章，解释了如何创建一个基本上是其他注释容器的注释。这样，如果我总是在特定用例中使用相同的5个注释，我会创建一个包含它们的注释并使用它。

A year or so I read an article that explained how I could create an annotation that basically is a container for other annotations. This way if I always use the same 5 annotations in a specific use-case I create an annotation that contains them and use that instead.

不幸的是，我找不到这篇文章了，我现在真的想为我的杰克逊配置做这件事。

Unfortunately, I can't find the article anymore and would really like to do that right now for my jackson configuration.

由于我自己无法找到任何相关信息，我开始质疑我的记忆。这是可能的还是我错了？

Since I can't find any information on that on my own I'm beginning to question my memory. Is this possible or I am just wrong?

编辑

我想要什么类似于：

@Target(ElementType.METHOD)
@com.fasterxml.jackson.databind.annotation.JsonSerialize(using=MySerializerThatIsUsedEverywhere.class
@javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter(MyCustomXmlAdapter.class)
@SomeOtherEvaluatedByTheSerializer
public @interface SerializerUseCase01 {
    public String a();
    public int b();
)

我的方案是我有一堆序列化用例，可以由具有不同配置的相同序列化程序处理。为了使一切更容易使用和更透明，我想将jackson配置和序列化器配置包装成一个注释。

my scenario is that i have a bunch of serialization use cases that can be handled by the same serializer with different configs. To make everything easier to use and more transparent i want to wrap the jackson config and the serializer config into one annotation.

推荐答案

杰克逊，这可以通过 @JacksonAnnotationsInside 元注释来完成。有关详细信息，请参阅本文，但其中的代码段为：

For Jackson, this can be done with @JacksonAnnotationsInside meta-annotation. See this article for more, but code snippet from there is:

@Retention(RetentionPolicy.RUNTIME) // IMPORTANT
@JacksonAnnotationsInside
@JsonInclude(Include.NON_NULL)
@JsonPropertyOrder({ "id", "name" }) 
public @interface MyStdAnnotations

从这里你可以将这种类型用于你自己的类，如下所示：

and from thereon you can use this type for your own classes like so:

@MyStdAnnotations
public class MyBean {
   public String name, id;
}

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