Re: [RT] Implementing Cocoon Blocks

[Bertrand Delacretaz]

Le Vendredi, 19 sep 2003, à 23:14 Europe/Zurich, Stefano Mazzocchi a 
écrit :

On Friday, Sep 19, 2003, at 19:31 Europe/Rome, Reinhard Poetz wrote:

From: Bertrand Delacretaz

Le Jeudi, 18 sep 2003, à 21:09 Europe/Zurich, Reinhard Poetz a écrit 
:

...I understand that I can't load a class from another block. My
question:
Is it possible to load classes from "Cocoon core" (whatever we will
consider as core) from within my block via "new" or are
there arguments
against it?...
I think loading classes directly via new (as opposed to factories +
interfaces) should be discouraged as much as possible, as it creates
unnecessary coupling.
Depending on the classloading mechanisms that are implemented,
selective filtering of what is allowed could be implemented easily I
think [1].
Do you have examples where direct instantation via "new" is required?
e.g. line 341 in the HTMLGenerator

   throw new ProcessingException("Exception in
HTMLGenerator.generate()",e);
(org.apache.cocoon.ProcessingException)

How can I do this in the generator in the future?
Of course!
Obviously - but still, do you want to let blocks access all public core 
classes openly?

Event if it's no needed right away, I think being able to filter this 
classloading from blocks to core should be planned for in the design 
(but maybe it is already?).

-Bertrand