/usr/share/pyshared/martian/components.py is in python-martian 0.14-0ubuntu1.
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#
# Copyright (c) 2006-2007 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
from zope.interface import implements
from martian import util
from martian.error import GrokError
from martian.interfaces import IGrokker, IComponentGrokker
from martian.martiandirective import directive, component
class GrokkerBase(object):
implements(IGrokker)
def grok(self, name, obj, **kw):
raise NotImplementedError
class GlobalGrokker(GrokkerBase):
"""Grokker that groks once per module.
"""
def grok(self, name, obj, **kw):
raise NotImplementedError
class ClassGrokker(GrokkerBase):
"""Grokker that groks classes in a module.
"""
implements(IComponentGrokker)
def grok(self, name, class_, module_info=None, **kw):
module = None
if module_info is not None:
module = module_info.getModule()
# Populate the data dict with information from the directives:
for d in directive.bind().get(self.__class__):
kw[d.name] = d.get(class_, module, **kw)
return self.execute(class_, **kw)
def execute(self, class_, **data):
raise NotImplementedError
class MethodGrokker(ClassGrokker):
def grok(self, name, class_, module_info=None, **kw):
module = None
if module_info is not None:
module = module_info.getModule()
# Populate the data dict with information from class or module
directives = directive.bind().get(self.__class__)
for d in directives:
kw[d.name] = d.get(class_, module, **kw)
# Ignore methods that are present on the component baseclass.
basemethods = set(util.public_methods_from_class(
component.bind().get(self.__class__)))
methods = set(util.public_methods_from_class(class_)) - basemethods
if not methods:
raise GrokError("%r does not define any public methods. "
"Please add methods to this class to enable "
"its registration." % class_, class_)
results = []
for method in methods:
# Directives may also be applied to methods, so let's
# check each directive and potentially override the
# class-level value with a value from the method *locally*.
data = kw.copy()
for bound_dir in directives:
d = bound_dir.directive
class_value = data[bound_dir.name]
data[bound_dir.name] = d.store.get(d, method,
default=class_value)
results.append(self.execute(class_, method, **data))
return max(results)
def execute(self, class_, method, **data):
raise NotImplementedError
class InstanceGrokker(GrokkerBase):
"""Grokker that groks instances in a module.
"""
implements(IComponentGrokker)
def grok(self, name, class_, **kw):
return self.execute(class_, **kw)
def execute(self, class_, **kw):
raise NotImplementedError
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