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Re: [aspectj-users] Dynamic use of Inter-Type Declarations
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Hi..
Thank you guys for your answers.
This is what i suspected, but i just thought i should ask around ;)
Well the example was constructed in order to explain what i wanted. Of
course i would not use that intricate solutions for such a easy
problem, but my curiosity was triggered by a question i got for a
collegue on antother matter, and i needed to investigate our options.
Thanx
Kaare
On 28/03/06, Matthew Webster <matthew_webster@xxxxxxxxxx> wrote:
>
> Kaare,
>
> The main restriction here lies with the JVM rather than Java or AspectJ.
> Even Hot-Swap implementations don't support adding or removing methods (as
> far as I know). However a important question is why you feel you need it in
> this scenario? While there may be compelling use cases for runtime AOP, e.g.
> 24x7 systems, this one does seem to be one. Why would the user not want to
> edit information in both views? Why not use additional context i.e. the view
> to determine whether the information can be edited rather that relying
> solely on the interfaces supported seeing as you will need this information
> to determine whether a runtime ITD should be used.
>
> Matthew Webster
> AOSD Project
> Java Technology Centre, MP146
> IBM Hursley Park, Winchester, SO21 2JN, England
> Telephone: +44 196 2816139 (external) 246139 (internal)
> Email: Matthew Webster/UK/IBM @ IBMGB, matthew_webster@xxxxxxxxxx
> http://w3.hursley.ibm.com/~websterm/
>
> Please respond to aspectj-users@xxxxxxxxxxx
>
> Sent by: aspectj-users-bounces@xxxxxxxxxxx
>
> To: aspectj-users@xxxxxxxxxxx
> cc:
> Subject: [aspectj-users] Dynamic use of Inter-Type Declarations
>
>
> Hi guys/girls.
>
> I have a question that I was not able to compute when reading my
> aspectJ books, and doing some googling.
>
> The question is:
> Is there a way of dynamicly at runtime add a new Inter-Type
> Declaration on an object ?
>
> Lets say I have a swing app with a panel containg a tree view of cd's
> where the actual cd is the leaf.
> One cd's could appair as a leaf in different subtrees (dimensions) e.g
>
> Genre dimension
> Genre
> +- Classical
> +- Mozart, Wolfgang Amadeus
> +- Mass in C minor
> -- Monteverdi Choir, John Elliot Gardiner
>
>
> Playlist dimension
> Down-Right-Terrific-Music
> -- Monteverdi Choir, John Elliot Gardiner
>
>
>
> Then what I would like is to have an Inter-Type Declaration that
> allows editing of data by adding an "Editable" interface and a
> corresponding implementation.
>
> In the treeview I then would like to use, let say, a right click on
> the leaf and a context menu with all the legal functionality for that
> leaf would pop up. I was thinking of using instanceof checking for
> that.
>
> So the main point beeing. In the Genre dimention i would like the Leaf
> to implement the Editable interface, but in the Playlist dimention it
> should not.
>
> Is this at all possible ?
>
>
> Best regards
> Kaare Nilsen
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