Spring annotations configuration looks like overhead

I just faced,that in order to use specific annotations for Spring Security,

I should explicitely allow them in my config(applicationContext.xml)

Example:

<sec:global-method-security secured-annotations="enabled" />
<sec:global-method-security jsr250-annotations="enabled" />
...

What advantages do you see in approac开发者_如何学运维h of explicitely declare what annotations

are allowed in our frameworked application?

Looks like overconfiguration,isn't it?

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One possible benefit is that it allows Spring Security to throw an exception when desired annotations are not present in the classpath (though it's mostly about JSR-250 annotations, since other annotations are parts of Spring Security itself).

Otherwise Spring Security would have to silently ignore absence of annotations, that may lead to surprising behaviour.