def ViewletManager(name, interface, template=None, bases=()):
"""
Create and return a new viewlet manager class that implements
:class:`zope.viewlet.interfaces.IViewletManager`.
:param str name: The name of the generated class.
:param interface: The additional interface the class will implement.
:keyword tuple bases: The base classes to extend.
"""
attrDict = {'__name__' : name}
if template is not None:
attrDict['template'] = ViewPageTemplateFile(template)
if ViewletManagerBase not in bases:
# Make sure that we do not get a default viewlet manager mixin, if the
# provided base is already a full viewlet manager implementation.
if not (len(bases) == 1 and
interfaces.IViewletManager.implementedBy(bases[0])):
bases = bases + (ViewletManagerBase,)
ViewletManagerCls = type(
'<ViewletManager providing %s>' % interface.getName(), bases, attrDict)
zope.interface.classImplements(ViewletManagerCls, interface)
return ViewletManagerCls
def ViewletManager(name, interface, template=None, bases=()):
"""
Create and return a new viewlet manager class that implements
:class:`zope.viewlet.interfaces.IViewletManager`.
:param str name: The name of the generated class.
:param interface: The additional interface the class will implement.
:keyword tuple bases: The base classes to extend.
"""
attrDict = {'__name__': name}
if template is not None:
attrDict['template'] = ViewPageTemplateFile(template)
if ViewletManagerBase not in bases:
# Make sure that we do not get a default viewlet manager mixin, if the
# provided base is already a full viewlet manager implementation.
if not (len(bases) == 1
and interfaces.IViewletManager.implementedBy(bases[0])):
bases = bases + (ViewletManagerBase, )
ViewletManagerCls = type(
'<ViewletManager providing %s>' % interface.getName(), bases, attrDict)
zope.interface.classImplements(ViewletManagerCls, interface)
return ViewletManagerCls
def __protectByInterface(self, interface, permission_id):
"Set a permission on names in an interface."
for n, d in interface.namesAndDescriptions(1):
self.__protectName(n, permission_id)
self._context.action(
discriminator = None,
callable = provideInterface,
args = (interface.__module__+'.'+interface.getName(), interface))
def ViewletManager(name, interface, template=None, bases=()):
attrDict = {'__name__' : name}
if template is not None:
attrDict['template'] = ViewPageTemplateFile(template)
if ViewletManagerBase not in bases:
# Make sure that we do not get a default viewlet manager mixin, if the
# provided base is already a full viewlet manager implementation.
if not (len(bases) == 1 and
interfaces.IViewletManager.implementedBy(bases[0])):
bases = bases + (ViewletManagerBase,)
ViewletManager = type(
'<ViewletManager providing %s>' % interface.getName(), bases, attrDict)
zope.interface.classImplements(ViewletManager, interface)
return ViewletManager
def ViewletManager(name, interface, template=None, bases=()):
attrDict = {'__name__': name}
if template is not None:
attrDict['template'] = ViewPageTemplateFile(template)
if ViewletManagerBase not in bases:
# Make sure that we do not get a default viewlet manager mixin, if the
# provided base is already a full viewlet manager implementation.
if not (len(bases) == 1
and interfaces.IViewletManager.implementedBy(bases[0])):
bases = bases + (ViewletManagerBase, )
ViewletManager = type(
'<ViewletManager providing %s>' % interface.getName(), bases, attrDict)
zope.interface.classImplements(ViewletManager, interface)
return ViewletManager
def fossilize_obj(cls,
obj,
interfaceArg=None,
useAttrCache=False,
mapClassType={},
**kwargs):
"""
Fossilizes the object, using the fossil provided by `interface`.
:param interfaceArg: the target fossile type
:type interfaceArg: IFossil, NoneType, or dict
:param useAttrCache: use caching of attributes if same fields are
repeated for a fossil
:type useAttrCache: boolean
"""
interface = cls.__obtainInterface(obj, interfaceArg)
name = interface.getName()
fossilName = cls.__extractFossilName(name)
result = {}
# cache method names for each interface
names = cls.__fossilInterfaceCache.get(interface)
if names is None:
names = interface.names(all=True)
cls.__fossilInterfaceCache[interface] = names
###
for methodName in names:
method = interface[methodName]
tags = method.getTaggedValueTags()
isAttribute = False
# In some cases it is better to use the attribute cache to
# speed up the fossilization
cacheUsed = False
if useAttrCache:
try:
methodResult = cls.__fossilAttrsCache[
obj._p_oid][methodName]
cacheUsed = True
except KeyError:
pass
if not cacheUsed:
# Please use 'produce' as little as possible;
# there is almost always a more elegant and modular solution!
if 'produce' in tags:
methodResult = method.getTaggedValue('produce')(obj)
else:
attr = getattr(obj, methodName)
if callable(attr):
try:
methodResult = attr()
except:
logging.getLogger('indico.fossilize').error(
"Problem fossilizing '%r' with '%s'" %
(obj, interfaceArg))
raise
else:
methodResult = attr
isAttribute = True
if hasattr(obj, "_p_oid"):
cls.__fossilAttrsCache.setdefault(
obj._p_oid, {})[methodName] = methodResult
if 'filterBy' in tags:
if 'filters' not in kwargs:
raise Exception('No filters defined!')
filterName = method.getTaggedValue('filterBy')
if filterName in kwargs['filters']:
filterBy = kwargs['filters'][filterName]
else:
raise Exception("No filter '%s' defined!" % filterName)
else:
filterBy = None
# Result conversion
if 'result' in tags:
targetInterface = method.getTaggedValue('result')
#targetInterface = globals()[targetInterfaceName]
methodResult = Fossilizable.fossilizeIterable(
methodResult,
targetInterface,
filterBy=filterBy,
mapClassType=mapClassType,
**kwargs)
# Conversion function
if 'convert' in tags:
convertFunction = method.getTaggedValue('convert')
converterArgNames = inspect.getargspec(convertFunction)[0]
converterArgs = dict((name, kwargs[name])
for name in converterArgNames
if name in kwargs)
try:
methodResult = convertFunction(methodResult,
**converterArgs)
except:
logging.getLogger('indico.fossilize').error(
"Problem fossilizing '%r' with '%s' (%s)" %
(obj, interfaceArg, methodName))
raise
# Re-name the attribute produced by the method
if 'name' in tags:
attrName = method.getTaggedValue('name')
elif isAttribute:
attrName = methodName
else:
attrName = cls.__extractName(methodName)
# In case the name contains dots, each of the 'domains' but the
# last one are translated into nested dictionnaries. For example,
# if we want to re-name an attribute into "foo.bar.tofu", the
# corresponding fossilized attribute will be of the form:
# {"foo":{"bar":{"tofu": res,...},...},...}
# instead of:
# {"foo.bar.tofu": res, ...}
current = result
attrList = attrName.split('.')
while len(attrList) > 1:
attr = attrList.pop(0)
if attr not in current:
current[attr] = {}
current = current[attr]
# For the last attribute level
current[attrList[0]] = methodResult
if "_type" in result or "_fossil" in result:
raise InvalidFossilException('"_type" or "_fossil"'
' cannot be a fossil attribute name')
else:
result["_type"] = mapClassType.get(obj.__class__.__name__,
obj.__class__.__name__)
if fossilName: #we check that it's not an empty string
result["_fossil"] = fossilName
else:
result["_fossil"] = ""
return result
def fossilize_obj(cls, obj, interfaceArg=None, useAttrCache=False, mapClassType=None, **kwargs):
"""
Fossilizes the object, using the fossil provided by `interface`.
:param interfaceArg: the target fossile type
:type interfaceArg: IFossil, NoneType, or dict
:param useAttrCache: use caching of attributes if same fields are
repeated for a fossil
:type useAttrCache: boolean
"""
mapClassType = dict(mapClassType or {}, AvatarUserWrapper='Avatar', AvatarProvisionalWrapper='Avatar',
EmailPrincipal='Email')
interface = cls.__obtainInterface(obj, interfaceArg)
name = interface.getName()
fossilName = cls.__extractFossilName(name)
result = {}
# cache method names for each interface
names = _fossil_cache.fossilInterface.get(interface)
if names is None:
names = interface.names(all=True)
_fossil_cache.fossilInterface[interface] = names
###
for methodName in names:
method = interface[methodName]
tags = method.getTaggedValueTags()
isAttribute = False
if 'onlyIf' in tags:
onlyIf = method.getTaggedValue('onlyIf')
# If the condition not in the kwargs or the condition False, we do not fossilize the method
if not kwargs.get(onlyIf, False):
continue
# In some cases it is better to use the attribute cache to
# speed up the fossilization
cacheUsed = False
if useAttrCache:
try:
methodResult = _fossil_cache.fossilAttrs[obj._p_oid][methodName]
cacheUsed = True
except KeyError:
pass
if not cacheUsed:
# Please use 'produce' as little as possible;
# there is almost always a more elegant and modular solution!
if 'produce' in tags:
methodResult = method.getTaggedValue('produce')(obj)
else:
attr = getattr(obj, methodName)
if callable(attr):
try:
methodResult = attr()
except:
logging.getLogger('indico.fossilize').error("Problem fossilizing '%r' with '%s'",
obj, interfaceArg)
raise
else:
methodResult = attr
isAttribute = True
if hasattr(obj, "_p_oid"):
_fossil_cache.fossilAttrs.setdefault(obj._p_oid, {})[methodName] = methodResult
if 'filterBy' in tags:
if 'filters' not in kwargs:
raise Exception('No filters defined!')
filterName = method.getTaggedValue('filterBy')
if filterName in kwargs['filters']:
filterBy = kwargs['filters'][filterName]
else:
raise Exception("No filter '%s' defined!" % filterName)
else:
filterBy = None
# Result conversion
if 'result' in tags:
targetInterface = method.getTaggedValue('result')
#targetInterface = globals()[targetInterfaceName]
methodResult = Fossilizable.fossilizeIterable(
methodResult, targetInterface, filterBy=filterBy, mapClassType=mapClassType, **kwargs)
# Conversion function
if 'convert' in tags:
convertFunction = method.getTaggedValue('convert')
converterArgNames = inspect.getargspec(convertFunction)[0]
converterArgs = dict((name, kwargs[name])
for name in converterArgNames
if name in kwargs)
if '_obj' in converterArgNames:
converterArgs['_obj'] = obj
try:
methodResult = convertFunction(methodResult, **converterArgs)
except:
logging.getLogger('indico.fossilize').error("Problem fossilizing '%r' with '%s' (%s)",
obj, interfaceArg, methodName)
raise
# Re-name the attribute produced by the method
if 'name' in tags:
attrName = method.getTaggedValue('name')
elif isAttribute:
attrName = methodName
else:
attrName = cls.__extractName(methodName)
# In case the name contains dots, each of the 'domains' but the
# last one are translated into nested dictionnaries. For example,
# if we want to re-name an attribute into "foo.bar.tofu", the
# corresponding fossilized attribute will be of the form:
# {"foo":{"bar":{"tofu": res,...},...},...}
# instead of:
# {"foo.bar.tofu": res, ...}
current = result
attrList = attrName.split('.')
while len(attrList) > 1:
attr = attrList.pop(0)
if attr not in current:
current[attr] = {}
current = current[attr]
# For the last attribute level
current[attrList[0]] = methodResult
if "_type" in result or "_fossil" in result:
raise InvalidFossilException('"_type" or "_fossil"'
' cannot be a fossil attribute name')
else:
result["_type"] = mapClassType.get(obj.__class__.__name__, obj.__class__.__name__)
if fossilName: #we check that it's not an empty string
result["_fossil"] = fossilName
else:
result["_fossil"] = ""
return result
def type(cls):
for interface in zope.interface.implementedBy(cls):
if interface.getName().startswith('D') or interface.getName().startswith('I'):
return interface.getName()[1:]
return cls.__name__
