[Zope3-Users] factories for an object

[Stephan Richter]

On Friday 01 June 2007 16:01, Lorenzo Gil Sanchez wrote:
> def getFactoriesForObject(obj):
>     factories = []
>     ifaces = tuple(zope.interface.providedBy(obj))
>     for iface in ifaces:
>         for name, factory in zope.component.getFactoriesFor(iface):
>             factoryIfaces = tuple(factory.getInterfaces())
>             if ifaces == factoryIfaces and name not in factories:
>                 factories.append(name)
>     return factories
>
> I works quite well for content types objects (the ones I'm interested
> in) but I'm curious about why this function return two factories in many

I think APIDOC provides that information as well.

> cases:
> >>> folder = zope.app.folder.folder.Folder()
> >>> getFactoriesForObject(folder)
>
> [u'zope.app.content.Folder',
> 'BrowserAdd__zope.app.folder.folder.Folder']
>
> Is that because the <browser:addMenuItem> ZCML directive adding always a
> factory for its class attribute?

Yep, exactely. :-)

> I'm curious about what zope gurus thing about my function and if anybody
> think if could be useful in zope.component.

I think it is not that useful. In fact, I would like to see the explicit 
factory support to be gone from zope.component, because it can be simply 
implemented using adapters.

Regards,
Stephan
-- 
Stephan Richter
CBU Physics & Chemistry (B.S.) / Tufts Physics (Ph.D. student)
Web2k - Web Software Design, Development and Training