[Zope3-dev] Form framework, adapters and pau

[Jim Fulton]

Dominik Huber wrote:
> Dominik Huber wrote:
> 
>> Summary:
>> ----------
>> I try to collect + and -:
>>
>> location helper function:
>> + Performance: We don't have to build location proxies all the time
>> + Explicitness: Excplicit in relation to the location issue after 
>> adaption
>> 0 Developer: Have to be aware of the location issue
>>
>> assert a location to all trusted adapters:
>> 0 Performace: Ok because only the trusted adapters are affected
>> - Explicitness: Implicit in relation to the location issue after adaption

This doesn't make any sense to me.

If a programmers uses the trusted adapter facility, they do so exlicitly.
The trusted adapter facility is documented to provide location.

>> 0 Developer: Have to be aware of the location issue

That's fine, because they are aware that they are using trusted adapters
and the trusted adapter factory is documented to provide location.

...

> 
> assert a location to all adapters:
> - Performance: Diffinitaly an overhead
> + Explicitness: Excplicit in relation to the location issue after adaption

No, this is very implicit.  It messes with *all* adapters, which is
way too intrusive.

Keep in mind too that proxies suck.  They are deep magic, like metaclasses.
Like metaclasses, they provide a powerful tool to solve extra hard problems,
but they should be used sparingly.

Jim

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