Java:带注释的注释(和传递值) [英] Java: Annotated Annotations (and passing values)

问题描述

我有一个注释，其中确实包含其他几个注释，很像这里的一个:

I have a annotation that does include several other annotations, pretty much like this one here:

@Component // Spring Component
@Interface OsgiService { boolean isFactory() }

意味着所有用 @OsgiService 注释的类也应自动注释为 @Component.哪个工作正常.

meaning that all classes annotated with @OsgiService shall automatically also be annotated as @Component. Which works fine.

然而，现在我想添加另一个注释，它有一个依赖于 @OsgiService 的 isFactory 参数的参数.

Now however, I'd like to add another annotation, that has a parameter which is dependent of the isFactory parameter of @OsgiService.

@Component // Spring Component
@Scope(isFactory() ? "prototype" : "singleton")
@Interface OsgiService { boolean isFactory() }

这不起作用.但是，由于注释的 isFactory 属性需要是一个静态值，难道不应该有这样的东西吗?

Which does not work. However, as isFactory property of an annotation requires to be a static value, shouldn't it be possible to have something like this?

推荐答案

我认为这不可能.

您可以创建两个注解:@OsgiService 和 @OsgiServiceFactory

You can create two annotations: @OsgiService and @OsgiServiceFactory

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