Re: [aspectj-users] InterType: introducing serialVersionUID into @Persis

[Tomasz Nazar <Tomasz.Nazar@xxxxxxxxxxxxxx>]

On the next beautiful day: Mon, 19 September, 2005, Alexandru Popescu wrote:

> > 1) Both "static" and "final" fields doesn't work with _interface_ 
> > (compiler error)
> 
> because any field declared/defined in an interface is already static final ;-).

Maybe. But my aim is to introduce "static" and "final" field to some
_class_ marked with an annotation. Tell me how to achieve that and you're
the winner ;)


> > 2) The problem with above (when applying inter-type field to an
> > _interface_) is that as a result I have other field than
> > 'serialVersionUID':
> > 
> > @Persistable Pojo.class:
> > public class Pojo implements java.io.Serializable, PersistenceAware
> > {
> >     //...
> >     public long ajc$interField$MyAspect$PersistenceAware$serialVersionUID;
> >     //..and I need simple public final _static_ serialVersionUID...
> > }
> > 
> I guess this naming is used to avoid any colissions. But I am not sure if this is correct, as you 
> will be completely unable to access it. Or am I missing something here?


The actual aspect's code:
public privileged aspect MyAspect 
{
    declare parents: @Persistable * implements PersistenceAware;
    public long PersistenceAware.XXX = 17;
}   

Resulting (decompiled) @Persistable ManagedPojo.class:

public class ManagedPojo
    implements PersistenceAware
{
    public long ajc$interField$MyAspect$PersistenceAware$XXX;
    public ManagedPojo()
    {
        MyAspect.ajc$interFieldInit$MyAspect$PersistenceAware$XXX(this);
    }
}

======================================================

> > 3) When applying to a concrete _class_ with:
> > @Persistable Pojo.class:
> > public class Pojo implements java.io.Serializable
> > {
> >     //...
> >     static final PojoConcrete.serialVersionUID = 17L;
> >     //it works, but I don't want the pointcut based on a concrete
> >     //class
> > }
> > Tomasz
> 
> same as above. not sure what to say. guys?
> ./alex

The concrete code for that case:
public privileged aspect MyAspect 
{
    declare parents: @Persistable * implements PersistenceAware;
    public long ManagedPojo.XXX = 17;
}


And the resulting (decompiled) @Persistable ManagedPojo.class:

public class ManagedPojo
implements PersistenceAware
{
    public ManagedPojo()
            {
    MyAspect.ajc$interFieldInit$MyAspect$ManagedPojo$XXX(this);
    }
    public long XXX;
}

XXX <-> serialVersionUID

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