[aspectwerkz-user] Re: Initializing references from a "before" aspect

Hi there.

If I understand you correctly, you want to modify the value of a
parameter that is passed to the method you are advising.

If so I would use an around advice and make use of the custom join
point (see  http://aspectwerkz.codehaus.org/new_features_in_2_0.html#Strongly_typed_proceed
for details) to change the parameter value and pass the modified
parameter value on.

Does this help?

/Jonas

On  hi there4/17/05, Hindin, Avi <[email protected]> wrote:
> Hi guys,
> 
>  
> 
>  My aim is to write a "before" aspect that initializes a reference passed
> to
> the original method as null.
> 
>  
> 
>  That is, what I logically want to do in the aspect is:
> 
>       myMethod(String str)
> 
>       {
> 
>            // "before" aspect should do the following:
> 
>             If(str==null) 
> 
>                      str = "abc";
> 
>  
> 
>  
> 
>            // applicative logic here ....
> 
>       }
> 
>  
> 
> All this is well, but, of course, does not work. Why? Because AspectWerkz
> implements "before" aspects by calling
> 
> an automatically generated method to do the work (example below) and you
> cannot, of course, initialize a reference 
> 
> within a method.
> 
>  
> 
>  But is there a workaround?    Please notice that such a workaround cannot
> involve attaching the aspect
> 
>  to code _callng_ the method, since that code is not available to me.
> 
>  
> 
>  Your help will be highly appreciated!
> 
>  
> 
> Avi Hindin
> 
> BMC Software
> 
>  
> 
>  
> 
>  
> 
> 
> 

-- 
/Jonas