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Grzegorz Kossakowski commented on COCOON3-14:
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> As far as I understood all the discussions it is now allowed to mix sax with
> stax or dom components in a pipeline,
> they are required to use the eventing (if you regard dom as one single big
> event).
Is this event-based communication guaranteed at PipelineComponent level or it's
left to implementation how to design it?
> If a user knows which type of components (s)he will use, the pipeline can be
> "narrowed down" to accept only those type of components.
> If the exact type is not known or a mixture of different components is to be
> used, using
How it's possible that user is using a component and does not know what kind of
input/output this component deals with?
I agree with Steven's point on the need for creation of marker interfaces. If
they are going to be purely marker interfaces then I'm quite concerned about
this solution.
Is it only my omission or this patch does not solve a problem with Pipeline
results outlined by Reinhard:
http://article.gmane.org/gmane.text.xml.cocoon.devel/79362
To sum up my opinion I'm -0 on this patch. In itself it's not bad (and not
invading) but I think this patch tries to tweak broken foundations. I would
prefer if we could agree on Pipelines and PipelineComponent fundamental design
decisions and goals before we move to providing patches.
There were two different approaches presented in form of patches that left on
or another side unhappy so such an agreement seems to be the best solution.
What about a serious discussion on this topic during ApacheCon EU this year? I
don't want to suspend the whole discussion for two months, of course.
> Use generics for pipeline assembly
> ----------------------------------
>
> Key: COCOON3-14
> URL: https://issues.apache.org/jira/browse/COCOON3-14
> Project: Cocoon 3
> Issue Type: Improvement
> Components: cocoon-pipeline
> Reporter: Carsten Ziegeler
> Assignee: Cocoon Developers Team
> Attachments: generics.patch
>
>
> This is a simple patch to add generics to the pipeline interface and impl.
> With additionally introducing marker interfaces for the component types (SAX,
> Stax, dom)
> this would allow compile time checks if all components have the correct type
> when assembling the pipeline.
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