Re: [aspectj-users] String Trimming anyone???

[Maximilian Stoerzer <stoerzer@xxxxxxxxxxxxxxxxx>]

Hi Ron!

Ron DiFrango schrieb:

> All,
>
> I am working with a database [DB2] where the fields are padded with spaces and I want to strip them on when I set the values in my DTO.  So I created the following aspect:
>
> privileged aspect CaptureStringSets {
> before(String val): set(* dto..*.*) && args(val) {
>        System.out.println("Before[" + val + "]");
>        val = val.trim();
>        System.out.println("After[" + val + "]");
>    }
> }
>  
This is not how before advice works - you can't assign a new Object 
here. Basically what you do is assign a new Object to a _copy_ of the 
reference passes to the setter method (Java's call by value semantics).

Therefore you would need around advice, using proceed you can pass a new 
Object - that should work.

Regards,
   Max