[entity] introduce a new 'adapters' registry
This changeset introduces the notion in adapters (as in Zope Component Architecture)
in a cubicweb way, eg using a specific registry of appobjects.
This allows nicer code structure, by avoid clutering entity classes and moving
code usually specific to a place of the ui (or something else) together with the
code that use the interface.
We don't use actual interface anymore, they are implied by adapters (which
may be abstract), whose reg id is an interface name.
Appobjects that used to 'implements(IFace)' should now be rewritten by:
* coding an IFaceAdapter(EntityAdapter) defining (implementing if desired)
the interface, usually with __regid__ = 'IFace'
* use "adaptable('IFace')" as selector instead
Also, the implements_adapter_compat decorator eases backward compatibility
with adapter's methods that may still be found on entities implementing
the interface.
Notice that unlike ZCA, we don't support automatic adapters chain (yagni?).
All interfaces defined in cubicweb have been turned into adapters, also
some new ones have been introduced to cleanup Entity / AnyEntity classes
namespace. At the end, the pluggable mixins mecanism should disappear in
favor of adapters as well.
# pylint: disable-msg=W0401,W0614
# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""exceptions used in the core of the CubicWeb web application
"""
__docformat__ = "restructuredtext en"
from cubicweb._exceptions import *
class PublishException(CubicWebException):
"""base class for publishing related exception"""
class RequestError(PublishException):
"""raised when a request can't be served because of a bad input"""
class NothingToEdit(RequestError):
"""raised when an edit request doesn't specify any eid to edit"""
class ProcessFormError(RequestError):
"""raised when posted data can't be processed by the corresponding field
"""
class NotFound(RequestError):
"""raised when a 404 error should be returned"""
class Redirect(PublishException):
"""raised to redirect the http request"""
def __init__(self, location):
self.location = location
class DirectResponse(Exception):
def __init__(self, response):
self.response = response
class StatusResponse(Exception):
def __init__(self, status, content=''):
self.status = int(status)
self.content = content
class InvalidSession(CubicWebException):
"""raised when a session id is found but associated session is not found or
invalid
"""
class RemoteCallFailed(RequestError):
"""raised when a json remote call fails
"""
def __init__(self, reason=''):
super(RequestError, self).__init__()
self.reason = reason
def dumps(self):
from cubicweb.web import json
return json.dumps({'reason': self.reason})
class LogOut(PublishException):
"""raised to ask for deauthentication of a logged in user"""
def __init__(self, url):
super(LogOut, self).__init__()
self.url = url