def __init__(self, baseProtocol, context = None):
self.baseProtocol = baseProtocol
self.context = context
# Note: Protocol is a ``classic'' class, so we don't use super()
Protocol.__init__(self)
api.declareAdapterForProtocol(self,NO_ADAPTER_NEEDED,baseProtocol)
def sequenceOf ( baseProtocol ):
"""Return a protocol representing an sequence of a given base protocol"""
key = ( sequenceOf, baseProtocol )
__registryLock.acquire()
try:
try:
return registry[ key ]
except KeyError:
proto = registry[ key ] = SequenceProtocol( baseProtocol )
declareAdapterForProtocol(
proto, lambda o: ADAPT_SEQUENCE( o, proto ), IBasicSequence
)
return proto
finally:
__registryLock.release()
def sequenceOf(baseProtocol):
"""Return a protocol representing an sequence of a given base protocol"""
key = (sequenceOf, baseProtocol)
__registryLock.acquire()
try:
try:
return registry[key]
except KeyError:
proto = registry[key] = SequenceProtocol(baseProtocol)
declareAdapterForProtocol(proto,
lambda o: ADAPT_SEQUENCE(o, proto),
IBasicSequence)
return proto
finally:
__registryLock.release()
def __protocolForType ( key ):
"""Recursive implementation of protocolForType; assumes standardized key"""
__registryLock.acquire()
try:
try:
return registry[ key ]
except KeyError:
baseType, methods, implicit = key
if implicit:
proto = WeakSubset( baseType, methods )
else:
proto = TypeSubset( baseType, methods )
registry[ key ] = proto
finally:
__registryLock.release()
# declare that proto implies all subset-method protocols
if len( methods ) > 1:
for method in methods:
subset = tuple( [ m for m in methods if m != method ] )
implied = __protocolForType( ( baseType, subset, implicit ) )
declareAdapterForProtocol( implied, NO_ADAPTER_NEEDED, proto )
# declare that explicit form implies implicit form
if implicit:
impliedBy = __protocolForType( ( baseType, methods, False ) )
declareAdapterForProtocol( proto, NO_ADAPTER_NEEDED, impliedBy )
# declare that baseType implements this protocol
declareAdapterForType( proto, NO_ADAPTER_NEEDED, baseType )
return proto
#-- EOF ------------------------------------------------------------------------
def __protocolForType(key):
"""Recursive implementation of protocolForType; assumes standardized key"""
__registryLock.acquire()
try:
try:
return registry[key]
except KeyError:
baseType, methods, implicit = key
if implicit:
proto = WeakSubset(baseType, methods)
else:
proto = TypeSubset(baseType, methods)
registry[key] = proto
finally:
__registryLock.release()
# declare that proto implies all subset-method protocols
if len(methods) > 1:
for method in methods:
subset = tuple([m for m in methods if m != method])
implied = __protocolForType((baseType, subset, implicit))
declareAdapterForProtocol(implied, NO_ADAPTER_NEEDED, proto)
# declare that explicit form implies implicit form
if implicit:
impliedBy = __protocolForType((baseType, methods, False))
declareAdapterForProtocol(proto, NO_ADAPTER_NEEDED, impliedBy)
# declare that baseType implements this protocol
declareAdapterForType(proto, NO_ADAPTER_NEEDED, baseType)
return proto
