def _restore(self, obj):
if has_tag(obj, tags.BYTES):
restore = self._restore_bytestring
elif has_tag(obj, tags.ID):
restore = self._restore_id
elif has_tag(obj, tags.REF): # Backwards compatibility
restore = self._restore_ref
elif has_tag(obj, tags.ITERATOR):
restore = self._restore_iterator
elif has_tag(obj, tags.TYPE):
restore = self._restore_type
elif has_tag(obj, tags.REPR): # Backwards compatibility
restore = self._restore_repr
elif has_tag(obj, tags.REDUCE):
restore = self._restore_reduce
elif has_tag(obj, tags.OBJECT):
restore = self._restore_object
elif has_tag(obj, tags.FUNCTION):
restore = self._restore_function
elif util.is_list(obj):
restore = self._restore_list
elif has_tag(obj, tags.TUPLE):
restore = self._restore_tuple
elif has_tag(obj, tags.SET):
restore = self._restore_set
elif util.is_dictionary(obj):
restore = self._restore_dict
else:
restore = lambda x: x
return restore(obj)
def _restore(self, obj):
if has_tag(obj, tags.BYTES):
restore = self._restore_bytestring
elif has_tag(obj, tags.ID):
restore = self._restore_id
elif has_tag(obj, tags.REF): # Backwards compatibility
restore = self._restore_ref
elif has_tag(obj, tags.ITERATOR):
restore = self._restore_iterator
elif has_tag(obj, tags.TYPE):
restore = self._restore_type
elif has_tag(obj, tags.REPR): # Backwards compatibility
restore = self._restore_repr
elif has_tag(obj, tags.REDUCE):
restore = self._restore_reduce
elif has_tag(obj, tags.OBJECT):
restore = self._restore_object
elif has_tag(obj, tags.FUNCTION):
restore = self._restore_function
elif util.is_list(obj):
restore = self._restore_list
elif has_tag(obj, tags.TUPLE):
restore = self._restore_tuple
elif has_tag(obj, tags.SET):
restore = self._restore_set
elif util.is_dictionary(obj):
restore = self._restore_dict
else:
restore = lambda x: x
return restore(obj)
def _get_flattener(self, obj):
if PY2 and isinstance(obj, file): # @UndefinedVariable
return self._flatten_file
if util.is_primitive(obj):
return lambda obj: obj
if util.is_bytes(obj):
return self._flatten_bytestring
list_recurse = self._list_recurse
if util.is_list(obj):
if self._mkref(obj):
return list_recurse
else:
self._push()
return self._getref
# We handle tuples and sets by encoding them in a "(tuple|set)dict"
if util.is_tuple(obj):
if not self.unpicklable:
return list_recurse
return lambda obj: {tags.TUPLE: [self._flatten(v) for v in obj]}
if util.is_set(obj):
if not self.unpicklable:
return list_recurse
return lambda obj: {tags.SET: [self._flatten(v) for v in obj]}
if util.is_dictionary(obj):
return self._flatten_dict_obj
if util.is_type(obj):
return _mktyperef
if util.is_object(obj):
return self._ref_obj_instance
if util.is_module_function(obj):
return self._flatten_function
# instance methods, lambdas, old style classes...
self._pickle_warning(obj)
return None
def restore(self, obj):
"""
Restores a flattened object to its original python state.
Simply returns any of the basic builtin types
>>> u = Unpickler()
>>> u.restore('hello world')
'hello world'
>>> u.restore({'key': 'value'})
{'key': 'value'}
"""
self._push()
if has_tag(obj, tags.ID):
objNumber = obj[tags.ID]
try:
objRef = self._objs[objNumber]
except IndexError:
raise IndexError(
'Cannot find objRef %d in self._objs of len(%d), looking for obj %r'
% (objNumber, len(self._objs), obj))
poppedValue = self._pop(objRef)
return poppedValue
if has_tag(obj, tags.REF):
return self._pop(self._namedict.get(obj[tags.REF]))
if has_tag(obj, tags.TYPE):
typeref = loadclass(obj[tags.TYPE])
if not typeref:
return self._pop(obj)
return self._pop(typeref)
if has_tag(obj, tags.REPR):
return self._pop(loadrepr(obj[tags.REPR]))
if has_tag(obj, tags.OBJECT):
cls = loadclass(obj[tags.OBJECT])
if not cls:
return self._pop(obj)
# check custom handlers
HandlerClass = handlers.registry.get(cls)
if HandlerClass:
handler = HandlerClass(self)
return self._pop(handler.restore(obj))
try:
if hasattr(cls, '__new__'):
instance = cls.__new__(cls)
else:
instance = object.__new__(cls)
except TypeError:
# old-style classes
try:
instance = cls()
except TypeError:
# fail gracefully if the constructor requires arguments
self._mkref(obj)
return self._pop(obj)
# keep a obj->name mapping for use in the _isobjref() case
self._mkref(instance)
if hasattr(instance, '__setstate__') and has_tag(obj, tags.STATE):
state = self.restore(obj[tags.STATE])
instance.__setstate__(state)
return self._pop(instance)
for k, v in sorted(obj.iteritems(), key=operator.itemgetter(0)):
# ignore the reserved attribute
if k in tags.RESERVED:
continue
self._namestack.append(k)
# step into the namespace
value = self.restore(v)
if (util.is_noncomplex(instance)
or util.is_dictionary_subclass(instance)):
instance[k] = value
else:
setattr(instance, k, value)
# step out
self._namestack.pop()
# Handle list and set subclasses
if has_tag(obj, tags.SEQ):
if hasattr(instance, 'append'):
for v in obj[tags.SEQ]:
instance.append(self.restore(v))
if hasattr(instance, 'add'):
for v in obj[tags.SEQ]:
instance.add(self.restore(v))
return self._pop(instance)
if util.is_list(obj):
return self._pop([self.restore(v) for v in obj])
if has_tag(obj, tags.TUPLE):
return self._pop(tuple([self.restore(v) for v in obj[tags.TUPLE]]))
if has_tag(obj, tags.SET):
return self._pop(set([self.restore(v) for v in obj[tags.SET]]))
if util.is_dictionary(obj):
data = {}
for k, v in sorted(obj.iteritems(), key=operator.itemgetter(0)):
self._namestack.append(k)
data[k] = self.restore(v)
self._namestack.pop()
return self._pop(data)
return self._pop(obj)
def restore(self, obj):
"""
Restores a flattened object to its original python state.
Simply returns any of the basic builtin types
>>> u = Unpickler()
>>> u.restore('hello world')
'hello world'
>>> u.restore({'key': 'value'})
{'key': 'value'}
"""
self._push()
if has_tag(obj, tags.ID):
objNumber = obj[tags.ID]
try:
objRef = self._objs[objNumber]
except IndexError:
raise IndexError('Cannot find objRef %d in self._objs of len(%d), looking for obj %r' % (objNumber, len(self._objs), obj))
poppedValue = self._pop(objRef)
return poppedValue
if has_tag(obj, tags.REF):
return self._pop(self._namedict.get(obj[tags.REF]))
if has_tag(obj, tags.TYPE):
typeref = loadclass(obj[tags.TYPE])
if not typeref:
return self._pop(obj)
return self._pop(typeref)
if has_tag(obj, tags.REPR):
return self._pop(loadrepr(obj[tags.REPR]))
if has_tag(obj, tags.OBJECT):
cls = loadclass(obj[tags.OBJECT])
if not cls:
return self._pop(obj)
# check custom handlers
HandlerClass = handlers.registry.get(cls)
if HandlerClass:
handler = HandlerClass(self)
return self._pop(handler.restore(obj))
try:
if hasattr(cls, '__new__'):
instance = cls.__new__(cls)
else:
instance = object.__new__(cls)
except TypeError:
# old-style classes
try:
instance = cls()
except TypeError:
# fail gracefully if the constructor requires arguments
self._mkref(obj)
return self._pop(obj)
# keep a obj->name mapping for use in the _isobjref() case
self._mkref(instance)
if hasattr(instance, '__setstate__') and has_tag(obj, tags.STATE):
state = self.restore(obj[tags.STATE])
instance.__setstate__(state)
return self._pop(instance)
for k, v in sorted(obj.iteritems(), key=operator.itemgetter(0)):
# ignore the reserved attribute
if k in tags.RESERVED:
continue
self._namestack.append(k)
# step into the namespace
value = self.restore(v)
if (util.is_noncomplex(instance) or
util.is_dictionary_subclass(instance)):
instance[k] = value
else:
setattr(instance, k, value)
# step out
self._namestack.pop()
# Handle list and set subclasses
if has_tag(obj, tags.SEQ):
if hasattr(instance, 'append'):
for v in obj[tags.SEQ]:
instance.append(self.restore(v))
if hasattr(instance, 'add'):
for v in obj[tags.SEQ]:
instance.add(self.restore(v))
return self._pop(instance)
if util.is_list(obj):
return self._pop([self.restore(v) for v in obj])
if has_tag(obj, tags.TUPLE):
return self._pop(tuple([self.restore(v) for v in obj[tags.TUPLE]]))
if has_tag(obj, tags.SET):
return self._pop(set([self.restore(v) for v in obj[tags.SET]]))
if util.is_dictionary(obj):
data = {}
for k, v in sorted(obj.iteritems(), key=operator.itemgetter(0)):
self._namestack.append(k)
data[k] = self.restore(v)
self._namestack.pop()
return self._pop(data)
return self._pop(obj)
def flatten(self, obj):
"""Takes an object and returns a JSON-safe representation of it.
Simply returns any of the basic builtin datatypes
>>> p = Pickler()
>>> p.flatten('hello world')
'hello world'
>>> p.flatten(u'hello world')
u'hello world'
>>> p.flatten(49)
49
>>> p.flatten(350.0)
350.0
>>> p.flatten(True)
True
>>> p.flatten(False)
False
>>> r = p.flatten(None)
>>> r is None
True
>>> p.flatten(False)
False
>>> p.flatten([1, 2, 3, 4])
[1, 2, 3, 4]
>>> p.flatten((1,2,))[tags.TUPLE]
[1, 2]
>>> p.flatten({'key': 'value'})
{'key': 'value'}
"""
self._push()
if self._depth == self._max_depth:
return self._pop(repr(obj))
if util.is_primitive(obj):
return self._pop(obj)
if util.is_list(obj):
return self._pop([self.flatten(v) for v in obj])
# We handle tuples and sets by encoding them in a "(tuple|set)dict"
if util.is_tuple(obj):
if self.unpicklable is True:
return self._pop({tags.TUPLE: [self.flatten(v) for v in obj]})
else:
return self._pop([self.flatten(v) for v in obj])
if util.is_set(obj):
if self.unpicklable is True:
return self._pop({tags.SET: [self.flatten(v) for v in obj]})
else:
return self._pop([self.flatten(v) for v in obj])
if util.is_dictionary(obj):
return self._pop(self._flatten_dict_obj(obj, obj.__class__()))
if util.is_type(obj):
return self._pop(_mktyperef(obj))
if util.is_object(obj):
if self._mkref(obj):
# We've never seen this object so return its
# json representation.
return self._pop(self._flatten_obj_instance(obj))
else:
# We've seen this object before so place an object
# reference tag in the data. This avoids infinite recursion
# when processing cyclical objects.
return self._pop(self._getref(obj))
return self._pop(data)
def flatten(self, obj):
"""Takes an object and returns a JSON-safe representation of it.
Simply returns any of the basic builtin datatypes
>>> p = Pickler()
>>> p.flatten('hello world')
'hello world'
>>> p.flatten(u'hello world')
u'hello world'
>>> p.flatten(49)
49
>>> p.flatten(350.0)
350.0
>>> p.flatten(True)
True
>>> p.flatten(False)
False
>>> r = p.flatten(None)
>>> r is None
True
>>> p.flatten(False)
False
>>> p.flatten([1, 2, 3, 4])
[1, 2, 3, 4]
>>> p.flatten((1,2,))[tags.TUPLE]
[1, 2]
>>> p.flatten({'key': 'value'})
{'key': 'value'}
"""
self._push()
if self._depth == self._max_depth:
return self._pop(repr(obj))
if util.is_primitive(obj):
return self._pop(obj)
if util.is_list(obj):
return self._pop([self.flatten(v) for v in obj])
# We handle tuples and sets by encoding them in a "(tuple|set)dict"
if util.is_tuple(obj):
if self.unpicklable is True:
return self._pop({tags.TUPLE: [self.flatten(v) for v in obj]})
else:
return self._pop([self.flatten(v) for v in obj])
if util.is_set(obj):
if self.unpicklable is True:
return self._pop({tags.SET: [self.flatten(v) for v in obj]})
else:
return self._pop([self.flatten(v) for v in obj])
if util.is_dictionary(obj):
return self._pop(self._flatten_dict_obj(obj, obj.__class__()))
if util.is_type(obj):
return self._pop(_mktyperef(obj))
if util.is_object(obj):
if self._mkref(obj):
# We've never seen this object so return its
# json representation.
return self._pop(self._flatten_obj_instance(obj))
else:
# We've seen this object before so place an object
# reference tag in the data. This avoids infinite recursion
# when processing cyclical objects.
return self._pop(self._getref(obj))
return self._pop(data)
