def declareProvides(self,protocol,adapter=NO_ADAPTER_NEEDED,depth=1):
registry = self.__dict__.get('__protocols_provided__')
if registry is None:
self.__protocols_provided__ = registry = {}
if updateWithSimplestAdapter(registry,protocol,adapter,depth):
adapt(protocol,IOpenProtocol).addImplicationListener(self)
return True
def registerObject(self, ob, adapter=NO_ADAPTER_NEEDED,depth=1):
# Object needs to be able to handle registration
if api.adapt(ob,IOpenProvider).declareProvides(self,adapter,depth):
if adapter is DOES_NOT_SUPPORT:
return # non-support doesn't imply non-support of implied
# Handle implied protocols
for proto, (extender,d) in self.getImpliedProtocols():
api.declareAdapterForObject(
proto, composeAdapters(adapter,self,extender), ob, depth+d
)
def ADAPT_SEQUENCE(ob, proto):
"""Convert iterable 'ob' into list of objects implementing 'proto'"""
marker = object()
out = []
proto = proto.baseProtocol # get the protocol to adapt to
for item in ob:
item = adapt(item, proto, marker)
if item is marker:
return None # can't adapt unless all members adapt
out.append(item)
return out
def ADAPT_SEQUENCE ( ob, proto ):
"""Convert iterable 'ob' into list of objects implementing 'proto'"""
marker = object()
out = [ ]
proto = proto.baseProtocol # get the protocol to adapt to
for item in ob:
item = adapt( item, proto, marker )
if item is marker:
return None # can't adapt unless all members adapt
out.append( item )
return out
def declareProvides(self, protocol, adapter=NO_ADAPTER_NEEDED, depth=1):
if updateWithSimplestAdapter(self.reg, protocol, adapter, depth):
adapt(protocol,IOpenProtocol).addImplicationListener(self.reg)
return True
def __call__(self, ob, default=api._marker):
"""Adapt to this protocol"""
return api.adapt(ob,self,default)
def __adapt__(self, obj):
return adapt(self,IOpenProtocol).__adapt__(obj)
def __adapt__(self, obj):
return adapt(self, IOpenProtocol).__adapt__(obj)