Re: [aspectj-users] Constructor ITD question: introduce no-arg ctor inst

[Simone Gianni <simoneg@xxxxxxxxxx>]

Hi Matthew,


Matthew Adams wrote:
> =====================
> // DOES NOT COMPILE
> public aspect NoArgConstructorMixin {
>     public ((@Entity *) && !hasmethod(* new())).new() { // can't
> introduce constructors with this syntax
>         // how do I ensure fields are initialized in here?  call super()?
>     }
> }
> =====================
>   

you cannot use type patterns when declaring an ITD. The syntax of ITD 
expects a simple type, not a pattern.

So you can write :

public String SomeClass.toString() { ... }

But you cannot write :

public String ((@Entity *)).toString() { ... }

Instead you have to do as you have already done with the Intro interface 
: declare an empty marker interface, then tell AspectJ to inject methods 
to that interface, then use declare parents to place the interface using 
a type pattern.

You should be able to declare also constructors this way.

I'm also using ApsectJ + OpenJPA enhancer, and I'm not facing the 
problem this problem, but probably I don't have fields initialized 
calling a static method. Since OpenJPA enhances the class AFTER ajc (for 
me too), it should see all the fields and methods that ajc has added to 
the entity classes correctly (it surely does for property).

If the OpenJPA introduced constructor does not take into account the 
fields added by AspectJ then maybe you're hitting a bug in the OpenJPA 
enhancer.

Hope this helps,
Simone

--
Simone Gianni            CEO Semeru s.r.l.           Apache Committer
http://www.simonegianni.it/