def recreate(cls, usage_id):
# if usage_id in cls._usage_index:
# raise KeyError('Usage %s is already in the index' % usage_id)
self = cls.__new__(cls)
self.id = usage_id
self.parent = None
self.block_name = BASE_KVS.get('USAGE_DATA')[self.id]['class_id']
self.def_id = BASE_KVS.get('USAGE_DATA')[self.id]['def_id']
children_ids = BASE_KVS.get('USAGE_DATA')[self.id]['children']
self.children = [Usage.recreate(x) for x in children_ids]
self._usage_index[self.id] = self
#TODO store_initial_state or similar might be necessary
for child in self.children:
child.parent = self
return self
def __init__(self, class_id, children=None, initial_state=None, def_id=None):
self.id = "usage_%d" % BASE_KVS.incr('ids',0)
self.def_id = def_id or ("def_%d" % BASE_KVS.incr('ids', 0))
self.children = children or []
usage_data = BASE_KVS.get('USAGE_DATA', {})
usage_data[self.id] = {
'class_id': class_id,
'def_id': self.def_id,
'children': [x.id for x in self.children]
}
BASE_KVS.set('USAGE_DATA', usage_data)
self.parent = None
self.block_name = class_id
self.initial_state = initial_state or {}
# Update our global index of all usages.
self._usage_index[self.id] = self
# Create the parent references as we construct children.
for child in self.children:
child.parent = self
