如何创建作为一组杰克逊注释的注释?

问题描述

大约一年后，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 个注解，我会创建一个包含它们的注解并改为使用它.

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.

很遗憾，我再也找不到这篇文章了，我很想现在就为我的 jackson 配置做这篇文章.

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

由于我自己找不到任何相关信息，我开始质疑我的记忆力.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

我想要的是这样的:

@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();
)

我的场景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.为了让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到一个注释中.

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

对于 Jackson，这可以通过 @JacksonAnnotationsInside 元注释来完成.有关更多信息，请参阅这篇文章，但其中的代码片段是:

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

从那时起，您可以将这种类型用于您自己的类，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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