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From Tom Drake <Tom.Dr...@tavant.com>
Subject RE: [general] lang scope? (was Re: [collections][lang] Predicate etc impls, was Re: commons-collections: New code contribution.)
Date Thu, 05 Dec 2002 18:35:32 GMT
It sounds like I've jumped into a bit of a hornets nest.

I was thinking this morning that such a move will run a high risk of
creating a circular dependancy between [collections] and [lang][functor]. It
seems likely that functors would want to use collection objects and
vice-versa. If I'm right about this, then all this code really belongs under
the same package.



-----Original Message-----
From: Rodney Waldhoff [mailto:rwaldhoff@apache.org]
Sent: Thursday, December 05, 2002 9:47 AM
To: Jakarta Commons Developers List
Subject: [general] lang scope? (was Re: [collections][lang] Predicate
etc impls, was Re: commons-collections: New code contribution.)



On Thu, 5 Dec 2002 scolebourne@btopenworld.com wrote:

> The plan is to make [collections] depend on [lang] and deprecate the
> Predicate etc. interfaces in [collections].

At the risk of becoming increasingly unpopular with the lang folks, for
reasons similiar to those I enumerated in [1] (and others), I'm
uncomfortable with moving Predicate et al to lang.  I'm having a lot of
trouble seeing lang as meeting the "Each package must have a clearly
defined purpose, scope, and API -- Do one thing well, and keep your
contracts." criterion.

Don't get me wrong, I think all of this is great stuff, but why does it
all have to be in lang?  If it doesn't meet the common reuse principle, it
should be in a different component.  The current (i.e., released) contents
of o.a.c.lang, o.a.c.lang.builder, o.a.c.lang.enum and
o.a.c.lang.exception seem reasonably coherent, but I don't think the
either the functor or the reflection packages are a clean fit (with
respect to the CRP, R/REP, etc.), either with each other or the other
classes in lang.

[1]
<http://archives.apache.org/eyebrowse/ReadMsg?listName=commons-dev@jakarta.a
pache.org&msgNo=19869>


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