def insert_single_edge(self, project, type, edge):
try:
retVal = self.__get_edge_parameters(project, type)[0][0]
source_label = retVal['source_label']
target_label = retVal['target_label']
is_doubled = retVal['isdoubled']
except IndexError:
raise interface_errors.GraphNonExistElementError(
'It is strange, the validator does not work')
source_id = edge.pop('source_id')
target_id = edge.pop('target_id')
attributes = self.converter(dict_=edge,
prefix_='',
connector_=':',
join_element_=', ',
parenthesis_=['{', '}'])
try:
return self.__insert_edge(source_id, source_label, target_id,
target_label, type, attributes,
is_doubled)[0][0]['id']
except GraphError as ge:
raise interface_errors.GraphInterfaceException(
'Unexpected exception occurred. The exception: {}'.format(
str(ge)))
def delete_single_node(self, id):
try:
return self.__delete_node(id)[0][0]['id']
except GraphError as ge:
raise interface_errors.GraphInterfaceException(str(ge))
except IndexError as ie:
raise interface_errors.GraphNonExistElementError(
'Node does not exist')
def delete_single_edge_non_typed(self, source_id, target_id):
try:
return self.__delete_single_edge(source_id, target_id,
None)[0][0]['collection']
except GraphError as ge:
raise interface_errors.GraphInterfaceException(
'Unexpected error: {0}'.format(str(ge)))
except IndexError:
raise interface_errors.GraphNonExistElementError(
'The given edge does not exist')
def get_single_edge_typed(self, source_id, target_id, type):
try:
return self.__get_single_edge(source_id, target_id,
type)[0][0]['edge'].properties
except GraphError:
raise interface_errors.GraphInterfaceException('Unexpected error')
except IndexError:
raise interface_errors.GraphNonExistElementError(
'The given edge does not exist')
def get_single_edge_non_typed(self, source_id, target_id):
try:
result = self.__get_single_edge(source_id, target_id, None)[0]
retVal = []
for res in result:
retVal.append(res['node'].properties)
return retVal
except GraphError:
raise interface_errors.GraphInterfaceException('Unexpected error')
except IndexError:
raise interface_errors.GraphNonExistElementError(
'The given edge does not exist')
def get_bulk_node(self, type, list_of_node_ids):
retVal = []
try:
result = self.__get_bulk_node(type, list_of_node_ids)[0]
for res in result:
retVal.append(res['node'].properties)
return retVal
except GraphError as ge:
raise interface_errors.GraphInterfaceException(
"Unexpected error. The exception is {0}".format(str(ge)))
except IndexError:
raise interface_errors.GraphNonExistElementError(
'The requested graph nodes do not exist')
def delete_bulk_node(self, type, list_of_ids):
retVal = []
try:
result = self.__delete_bulk_node(type, list_of_ids)[0]
for res in result:
retVal.append(res['id'])
return retVal
except GraphError as ge:
raise interface_errors.GraphInterfaceException(
"Unexpected error. The exception is {0}".format(str(ge)))
#It is always raised when a node has, at least, one edge
except IndexError:
raise interface_errors.GraphNonExistElementError(
'The requested graph nodes do not exist')
def delete_meta_node(self, project, title):
try:
return self.__delete_ontology_node(project, title)[0][0]['id']
except (GraphError, KeyError, IndexError):
raise interface_errors.GraphNonExistElementError(
'The requested node is not exist')
def get_single_node(self, id):
try:
return self.__get_node(id)[0][0]['node'].properties
except GraphError:
raise interface_errors.GraphNonExistElementError(
"The given node does not exist: {0}".format(id))