def _hasattribute(obj, name):
try:
_getattribute(obj, name)
except AttributeError:
return False
else:
return True
def __setstate__(self, state):
if _hasattribute(self, '__dict__'):
_getattribute(self, '__dict__').clear()
for name in self._p_gen_data_slots():
_delattribute(self, name)
if state is not None:
for key, value in iteritems(state):
_setattribute(self, key, value)
def __getstate__(self):
if self._p_status == GHOST:
self._p_load_state()
state = {}
if _hasattribute(self, '__dict__'):
state.update(_getattribute(self, '__dict__'))
for name in self._p_gen_data_slots():
state[name] = _getattribute(self, name)
return state
def __getattribute__(self, name):
if name[:3] != "_p_" and name not in _GHOST_SAFE_ATTRIBUTES:
if self._p_status == GHOST:
self._p_load_state()
connection = self._p_connection
if connection is not None and self._p_serial != connection.transaction_serial:
connection.note_access(self)
return _getattribute(self, name)
def __getattribute__(self, name):
if name[:3] != '_p_' and name not in _GHOST_SAFE_ATTRIBUTES:
if self._p_status == GHOST:
self._p_load_state()
connection = self._p_connection
if (connection is not None and
self._p_serial != connection.transaction_serial):
connection.note_access(self)
return _getattribute(self, name)
def get(self, compute):
"""(compute) -> value
Compute the value (if necessary) and return it. 'compute' needs
to be a function that takes no arguments.
"""
# we are careful here not to mark object as UNSAVED
if _hasattribute(self, 'value'):
value = _getattribute(self, 'value')
else:
value = compute()
_setattribute(self, 'value', value)
return value
def __setstate__(self, state):
self_dict = _getattribute(self, '__dict__')
self_dict.clear()
self_dict.update(state)
