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Re: [aspectj-users] Why annotations are not exposed through JoinPoint.StaticPart?
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Hi,
On 14 December 2011 11:27, Mark <mark.kharitonov@xxxxxxxxx> wrote:
> If so, then it should be available in JoinPoint.StaticPart, but it is
> neither there nor is it in JoinPoint. Why?
It isn't directly on either of those, but they are accessible if you
of course. I presume you are doing something like this: for a Field
joinpoint:
((FieldSignature)thisJoinPoint.getSignature()).getField().getAnnotations()
similar thing for methods. It could be exposed directly on JoinPoint
I suppose but it'd just be a cache of the call I showed above - there
isn't any magic in how AspectJ could do it in a more optimal way.
Annotations can't be 'new'd up directly, they tend to have to be
fetched from somewhere.
> Does it mean that accessing
> annotations through the reflection is so cheap that it is OK to do so in
> aspect advices?
No, reflection isn't cheap. So you should cache the results if you
are going to keep asking the question. I could cache them in the
joinpoint object, please raise an enhancement request if you want this
but without a few votes it won't be top of the list I'm afraid.
cheers
Andy
