def _newInstance(cls, state=_NO_STATE):
"""
Make a new instance of a class without calling its __init__ method.
Supports both new- and old-style classes.
@param state: A C{dict} used to update C{inst.__dict__} or C{_NO_STATE}
to skip this part of initialization.
@return: A new instance of C{cls}.
"""
if not isinstance(cls, _OldStyleClass):
# new-style
inst = cls.__new__(cls)
if state is not _NO_STATE:
inst.__dict__.update(state) # Copy 'instance' behaviour
else:
if state is not _NO_STATE:
inst = _OldStyleInstance(cls, state)
else:
inst = _OldStyleInstance(cls)
return inst
def _newInstance(cls, state=_NO_STATE):
"""
Make a new instance of a class without calling its __init__ method.
Supports both new- and old-style classes.
@param state: A C{dict} used to update C{inst.__dict__} or C{_NO_STATE}
to skip this part of initialization.
@return: A new instance of C{cls}.
"""
if not isinstance(cls, _OldStyleClass):
# new-style
inst = cls.__new__(cls)
if state is not _NO_STATE:
inst.__dict__.update(state) # Copy 'instance' behaviour
else:
if state is not _NO_STATE:
inst = _OldStyleInstance(cls, state)
else:
inst = _OldStyleInstance(cls)
return inst
def _createBlank(cls):
"""
Given an object, if that object is a type (or a legacy old-style class),
return a new, blank instance of that type which has not had C{__init__}
called on it. If the object is not a type, return C{None}.
@param cls: The type (or class) to create an instance of.
@type cls: L{_OldStyleClass}, L{type}, or something else that cannot be
instantiated.
@return: a new blank instance or L{None} if C{cls} is not a class or type.
"""
if isinstance(cls, type):
return cls.__new__(cls)
if not _PY3 and isinstance(cls, _OldStyleClass):
return _OldStyleInstance(cls)
def _createBlank(cls):
"""
Given an object, if that object is a type (or a legacy old-style class),
return a new, blank instance of that type which has not had C{__init__}
called on it. If the object is not a type, return C{None}.
@param cls: The type (or class) to create an instance of.
@type cls: L{_OldStyleClass}, L{type}, or something else that cannot be
instantiated.
@return: a new blank instance or L{None} if C{cls} is not a class or type.
"""
if isinstance(cls, type):
return cls.__new__(cls)
if not _PY3 and isinstance(cls, _OldStyleClass):
return _OldStyleInstance(cls)
def unjellyAO(self, ao):
"""Unjelly an Abstract Object and everything it contains.
I return the real object.
"""
self.stack.append(ao)
t = type(ao)
if t in _SIMPLE_BUILTINS:
return ao
elif t is list:
l = []
for x in ao:
l.append(None)
self.unjellyInto(l, len(l)-1, x)
return l
elif t is tuple:
l = []
tuple_ = tuple
for x in ao:
l.append(None)
if isinstance(self.unjellyInto(l, len(l)-1, x), crefutil.NotKnown):
tuple_ = crefutil._Tuple
return tuple_(l)
elif t is dict:
d = {}
for k,v in ao.items():
kvd = crefutil._DictKeyAndValue(d)
self.unjellyInto(kvd, 0, k)
self.unjellyInto(kvd, 1, v)
return d
else:
#Abstract Objects
c = ao.__class__
if c is Module:
return reflect.namedModule(ao.name)
elif c in [Class, Function] or issubclass(c, type):
return reflect.namedObject(ao.name)
elif c is InstanceMethod:
im_name = ao.name
im_class = reflect.namedObject(ao.klass)
im_self = self.unjellyAO(ao.instance)
if im_name in im_class.__dict__:
if im_self is None:
return getattr(im_class, im_name)
elif isinstance(im_self, crefutil.NotKnown):
return crefutil._InstanceMethod(im_name, im_self, im_class)
else:
return _constructMethod(im_class, im_name, im_self)
else:
raise TypeError("instance method changed")
elif c is Instance:
klass = reflect.namedObject(ao.klass)
state = self.unjellyAO(ao.state)
if hasattr(klass, "__new__"):
inst = klass.__new__(klass)
else:
inst = _OldStyleInstance(klass)
if hasattr(klass, "__setstate__"):
self.callAfter(inst.__setstate__, state)
else:
inst.__dict__ = state
return inst
elif c is Ref:
o = self.unjellyAO(ao.obj) #THIS IS CHANGING THE REF OMG
refkey = ao.refnum
ref = self.references.get(refkey)
if ref is None:
self.references[refkey] = o
elif isinstance(ref, crefutil.NotKnown):
ref.resolveDependants(o)
self.references[refkey] = o
elif refkey is None:
# This happens when you're unjellying from an AOT not read from source
pass
else:
raise ValueError("Multiple references with the same ID: %s, %s, %s!" % (ref, refkey, ao))
return o
elif c is Deref:
num = ao.refnum
ref = self.references.get(num)
if ref is None:
der = crefutil._Dereference(num)
self.references[num] = der
return der
return ref
elif c is Copyreg:
loadfunc = reflect.namedObject(ao.loadfunc)
d = self.unjellyLater(ao.state).addCallback(
lambda result, _l: _l(*result), loadfunc)
return d
else:
raise TypeError("Unsupported AOT type: %s" % t)
del self.stack[-1]
def unjellyAO(self, ao):
"""Unjelly an Abstract Object and everything it contains.
I return the real object.
"""
self.stack.append(ao)
t = type(ao)
if t in _SIMPLE_BUILTINS:
return ao
elif t is list:
l = []
for x in ao:
l.append(None)
self.unjellyInto(l, len(l) - 1, x)
return l
elif t is tuple:
l = []
tuple_ = tuple
for x in ao:
l.append(None)
if isinstance(self.unjellyInto(l,
len(l) - 1, x),
crefutil.NotKnown):
tuple_ = crefutil._Tuple
return tuple_(l)
elif t is dict:
d = {}
for k, v in ao.items():
kvd = crefutil._DictKeyAndValue(d)
self.unjellyInto(kvd, 0, k)
self.unjellyInto(kvd, 1, v)
return d
else:
#Abstract Objects
c = ao.__class__
if c is Module:
return reflect.namedModule(ao.name)
elif c in [Class, Function] or issubclass(c, type):
return reflect.namedObject(ao.name)
elif c is InstanceMethod:
im_name = ao.name
im_class = reflect.namedObject(ao.klass)
im_self = self.unjellyAO(ao.instance)
if im_name in im_class.__dict__:
if im_self is None:
return getattr(im_class, im_name)
elif isinstance(im_self, crefutil.NotKnown):
return crefutil._InstanceMethod(
im_name, im_self, im_class)
else:
return _constructMethod(im_class, im_name, im_self)
else:
raise TypeError("instance method changed")
elif c is Instance:
klass = reflect.namedObject(ao.klass)
state = self.unjellyAO(ao.state)
if hasattr(klass, "__new__"):
inst = klass.__new__(klass)
else:
inst = _OldStyleInstance(klass)
if hasattr(klass, "__setstate__"):
self.callAfter(inst.__setstate__, state)
else:
inst.__dict__ = state
return inst
elif c is Ref:
o = self.unjellyAO(ao.obj) #THIS IS CHANGING THE REF OMG
refkey = ao.refnum
ref = self.references.get(refkey)
if ref is None:
self.references[refkey] = o
elif isinstance(ref, crefutil.NotKnown):
ref.resolveDependants(o)
self.references[refkey] = o
elif refkey is None:
# This happens when you're unjellying from an AOT not read from source
pass
else:
raise ValueError(
"Multiple references with the same ID: %s, %s, %s!" %
(ref, refkey, ao))
return o
elif c is Deref:
num = ao.refnum
ref = self.references.get(num)
if ref is None:
der = crefutil._Dereference(num)
self.references[num] = der
return der
return ref
elif c is Copyreg:
loadfunc = reflect.namedObject(ao.loadfunc)
d = self.unjellyLater(ao.state).addCallback(
lambda result, _l: _l(*result), loadfunc)
return d
else:
raise TypeError("Unsupported AOT type: %s" % t)
del self.stack[-1]
