def process_result_set(self):
"""
@return: a Topo_Diff object consisting of the commit node and parent link
"""
ret = Topo_Diff()
hash_parent = None
hash_child = None
ts_created = None
for _, _, r_set in self.iter__r_set():
for row in r_set:
for ret_dict in row:
assert None == hash_parent # assert hash values set once only
assert None == hash_child
assert None == ts_created
hash_parent = ret_dict['head_parent_commit']['hash']
hash_child = ret_dict['head_commit']['hash']
ts_created = ret_dict['ts_created']
ret.node_set_add = [{'id': self.n_id, '__label_set': ['__Commit']}]
l = Link.Link_Ptr(src_id=hash_parent, dst_id=hash_child)
l['id'] = self.l_id
l['__type'] = '__Parent'
ret.link_set_add = [l]
ret.meta['ts_created'] = ts_created
return ret
def deserialize_param_set(param_json):
l_ptr_set_raw = param_json['link_ptr_set']
__sanitize_input(l_ptr_set_raw)
l_ptr_set = []
for lptr_dict in l_ptr_set_raw:
src_id = lptr_dict.get('__src_id')
dst_id = lptr_dict.get('__dst_id')
l_ptr_set += [Link.Link_Ptr(src_id=src_id, dst_id=dst_id)]
return l_ptr_set
def process_result_set(self):
ret_n_set = []
ret_l_set = []
for _, _, r_set in self.iter__r_set():
for row in r_set:
n, n_lbl_set, l_set = row.items() # see query return statement
# reconstruct nodes
assert None != n.get('id'), "db contains nodes with no id"
n['__label_set'] = self.process_q_ret__n_label_set(n_lbl_set)
ret_n_set.append(n)
# reconstruct links from link tuples
for l_tuple in l_set:
assert 3 == len(l_tuple) # see query return statement
if None == l_tuple[0]: # check if link dst is None
# as link matching is optional, collect may yield empty sets
continue
ret_l, ret_l_type, ret_l_dst_id = l_tuple
l = Link.Link_Ptr(src_id=n['id'], dst_id=ret_l_dst_id)
l['id'] = ret_l['id']
l['__type'] = self.process_q_ret__l_type(ret_l_type)
ret_l_set.append(l)
if len(ret_n_set
) >= self.limit: # TODO: generalize logic, mv to DB_Driver
log.warning(
'DB op result set larger than query limit: size: %d, limit: %d'
% (len(ret_n_set), self.limit))
topo_diff = Topo_Diff(node_set_add=ret_n_set, link_set_add=ret_l_set)
return topo_diff