It is valid both to:
- Declare an interface for a built-in type and
register adapters for that interface, and to
- Register adapters for builtin types directly.
I can't promise that this works now, but it ought to work.
I'm 90% sure that it does in fact work, at least in Zope 3.
Jim
Roger Ineichen wrote:
Hi Jim,
can you confirm that this is a valid concept for
the adapter registry or do we get trouble in the future?
I didn't find any sample in the README.txt files about adapting
builtin strings like a "principal_id").
Hi Michael and Mac
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Michael Howitz
Sent: Wednesday, December 07, 2005 8:59 AM
To: Paul Winkler
Cc: [email protected]
Subject: Re: [Zope3-Users] Adapting a builtin?
On Tue, 2005-12-06 at 18:44 -0500, Paul Winkler wrote:
Hi,
Is it possible to register an adapter for a builtin type
such as str? All the adapter examples I see use an
interface for the
"for" attribute.
Something like:
<adapter for="str"
provides=".interfaces.IHTTPConnection"
factory="httplib.HTTPConnection"
/>
Hi,
in plain Zope3 (I'm not using Five, but it may be similar there.) you
can declare an interface for the buitin: (e.g. in interfaces.py)
class interface IStr(Interface):
# define the methods here which you need to access
def upper():
"upper ... as an example"
In configure.zcml, you declare the interface for the builtin:
<class class="str">
<implements interface=".interfaces.IStr" />
</class>
<adapter
for=".interfaces.IStr"
provides=".interfaces.IHTTPConnection"
factory="httplib.HTTPConnection"
/>
Then you can do:
IHTTPConnection('string') to get the adapter.
HTH,
mac
That's a interesting question. I do it also, but in a different
way. It works for me like this and the adapter registry and
persistence work well.
--------------
class PrincipalMessagesForPrincipalId(BaseMessages):
"""Base implementation for principal annotation based messages."""
adapts(IAttributeAnnotatable, str)
implements(IPrincipalMessages)
messageQueueKey = 'PrincipalMessages'
def __init__(self, context, principalId):
"""Initialize with a context."""
self.context = context
self.principalId = principalId
--------------
With adapts() and implements() you can use a simply registration
like:
--------------
<adapter factory=".adapters.PrincipalMessagesForPrincipalId" />
--------------
Regards
Roger Ineichen
Projekt01 GmbH
www.projekt01.ch
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