Re: Re: How I plan to move forward.

Geoff -

  Is there a way... (what a way to start a question :-/) to add
exclusions? In asking that question, I glanced through some of the code
I have access to and am afraid there's no sort of 'exclusion rule' that
would solve the namespace problem in it so I guess my question is aimed
at education vs. reality. I see this more of a possibility with more the
Tapestry code situation as opposed to the /WEB-INF/foo.application +
/WEB-INF/bar.library one.

  As for hard to explain and hard for end users to accept - I'd actually
venture to replace "hard" with "impossible". And that's just going by
what I've already had to explain without outside of this issue.

  fyi:  a reply to your email goes directly to you, not the list.

Brian
 
Geoff Longman wrote:
> I have been writing code and tests to enforce tradeoff #3
>
> (3)"Namespaces of any kind, application or library, must not overlap"
>
> and as I have progressed it has become clear how this will impact
> users of Spindle.
>
> "must not overlap" is actually easy to test for.
>
> This is legal:
>
> /WEB-INF/foo/foo.application
> /WEB-INF/bar/bar.libary
> /WEB-INF/cat/cat.libary
>
> none of the above overlap. No page/component in any of the above
> namespaces can be referenced by another namespace.
>
> This is illegal:
>
> /WEB-INF/foo.application
> /WEB-INF/bar.library
>
> if Foo is a component in foo.application, Foo is also a component in
> bar.library.
>
> This is legal (but undesired IMHO:
>
> /bar/bar.library
> /WEB-INF/foo.application
>
> Undesirable as bar.library is outside of /WEB-INF/ and therefore
> "servable" to a browser.
>
> This would appear to be illegal (and is by the current detection routine):
>
> /bar.library
> /WEB-INF/foo.application
>
> Since a page in bar.libary could reference component Foo in
> foo.application like this:
>
> @WEB-INF/Foo
>
> But WEB-INF is not allowed in component names so an error would be
> thrown by Tapestry.
> So /bar.library is legal.
>
> But, this is illegal
>
> /bar.library
> /cat/cat.library
> /WEB-INF/foo.application
>
> foo.application is safe but all the pages/components in cat are also
> part of bar.
>
> To make the last one legal one would have to move bar:
>
> /bar/bar.library
> /cat/cat.library
> /WEB-INF/foo.application
>
>
> Illegal:
>
> /com/iw/foo.library
> /com/iw/bar/bar.library
>
> Legal:
>
> /com/iw/foo/foo.library
> /com/iw/bar/bar.library
>
> I'm getting nervous that
>
> (3)"Namespaces of any kind, application or library, must not overlap"
>
> is too:
>
> - Hard to explain
> - Hard to accept by end users.
>
>
> And to make this even more special, Tapestry itself violates the rule:
>
> /org/apache/tapestry/Framework.library
> /org/apache/tapestry/contrib/Contrib.library
> /org/apache/tapestry/contrib/inspector/Inspector.library
>
> Which the detection routine would reject as illegal.
>
> I'm trying to underestand the implications of this and am spending
> some time this evening coming up with an example application.
>
> Geoff
>
> --
> The Spindle guy.          http://spindle.sf.net
> Get help with Spindle:   
> http://lists.sourceforge.net/mailman/listinfo/spindle-user
> Blog:                     http://jroller.com/page/glongman
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>
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