@Around annotation

[Encrypt]

Hi all,
We are having a slight issue getting the @AspectJ annotations to work on an around advice.

We have done a search, but fail to find any explantion of the annotation syntax, so were hoping you guys would help.

We have a class A.
A has several methods all of which we wish to put @Around advice on, so that we can change the exception that is being thrown.

Here is an example of the @AspectJ class we are using:

.....
@Around("Execution(* com.myclasses..*Dao(..))"
public Object aMethod(ProceedingJoinPoint pjp){
}

We are happy with the actual advice, but we dont understand the syntax of the annotation:

What does the first * represent, is it the return type?
Is the .*Dao acceptable?
what is the meaning of the (..)?

Thanks
G

[ramnivas]

You should read Spring and AspectJ reference guide.

In your case:
- The first * means any return type.
- The first .. means any level of packages (i.e. direct and indirect subpackages of com.myclasses)
- The last .. means any number and type of arguments.

-Ramnivas

[Encrypt]

Thanks for the that.

Gavin