Re: [aspectj-users] A little pointcut help please

[Matthew Adams <matthew@xxxxxxxxxxxxxxx>]

BTW, now that I think about it, even in OSGi, I'm not sure this solves
my problem, because OSGi bundles export packages, not individual
classes or methods, and my problem exists at the method visibility
level across several classes within the package.

On Thu, Oct 8, 2009 at 11:52 PM, Gopinathan Balaji
<gopinathanbalaji@xxxxxxxxx> wrote:
>
> I think the difference is that package-protected classes are visible only to
> members of the same package. They're not visible to members of a different
> package of the same assembly (assembly is the term the OP used; I think JAR
> would be the appropriate analogy here).
>
> In any case, I think the OSGi bundles' manifest specification has solved
> this for Java components/applications. Only what is exposed through the
> bundle's manifest is visible/usable outside the bundle. In other words, all
> un-exposed classes are "protected internal".
>
> With AspectJ, I think we need some classloader magic to effect this (same as
> what OSGi does??), or, AspectJ supports something like a
> "within(<ClassLoaderHierarchy>)" expression.
>
> Thanks,
> Balaji
>
> ________________________________
> From: Wim Deblauwe <wim.deblauwe@xxxxxxxxx>
> To: aspectj-users@xxxxxxxxxxx
> Sent: Fri, October 9, 2009 12:00:58 PM
> Subject: Re: [aspectj-users] A little pointcut help please
>
> What is the difference between what you want to do here and "package
> protected" that is standard in java (e.g. not using private, protected or
> public modifiers) ?
>
> regards,
>
> Wim
>
> 2009/10/8 Matthew Adams <matthew@xxxxxxxxxxxxxxx>
>>
>> Hi all,
>>
>> Java has fused the concept of "namespace" and "component" in its
>> concept of "package".  This results in having to mark public things
>> that you really don't want public consumers to access.  .NET actually
>> fixes this with its "protected internal" scope:  only code from within
>> the current assembly can access the member scoped as protected
>> internal.
>>
>> Now, I have a declare error statement attempting to achieve
>> functionality similar to C#'s "protected internal" scope, whereby only
>> code from within the current package is allowed to access the thing
>> that is annotated with @ProtectedInternal.
>>
>> Here is my annotation & my declare error statement, but I'd like to
>> make it more general, replacing "org.foo.model.*" with something more
>> general that implies that access is disallowed from code that is
>> outside the called/accessed element's package, that is, not in the
>> annotated element's package.
>>
>> @Target( { ElementType.TYPE, ElementType.METHOD, ElementType.FIELD,
>>                ElementType.CONSTRUCTOR })
>> @Retention(RetentionPolicy.RUNTIME)
>> public @interface ProtectedInternal {}
>> ===============
>> public aspect ProtectedInternalDeclareError {
>>        declare error :
>>                (!within(org.foo.model.*)) // TODO:  replace this
>> hardcoding with
>> something more general
>>                        && (set(@ProtectedInternal * *)
>>                                || get(@ProtectedInternal * *)
>>                                || call(@ProtectedInternal * *(..))
>>                                || call(* (@ProtectedInternal *..*).*(..))
>>                                || call(@ProtectedInternal *.new(..))
>>                                || call((@ProtectedInternal *).new(..))
>>                )
>>                : "The target constructor, method, or field is not designed
>> for
>> public consumption; access is disallowed.";
>> }
>>
>> Help, anyone?
>>
>> Thanks,
>> Matthew
>> _______________________________________________
>> aspectj-users mailing list
>> aspectj-users@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/aspectj-users
>
>
>
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>



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