def update(self, graph, prefixes):
"""
Performs a SPARQL update operation for a the given parameters.
:param self: the Operation object used to get parameters
:param graph: Graph to be edited
:return: The updated graph
"""
return graph.update(
Prefix.writePrefixes(prefixes, "SPARQL") + str(self))
def evaluate(self, graph, prefixes):
"""
Evaluates the SPARQL query for a given Query object.
Return an iterable query result
"""
select_str = "SELECT "
for var in self.select:
select_str += var + " "
select_str += "\n"
return graph.query(
Prefix.writePrefixes(prefixes, "SPARQL") + select_str +
"WHERE { " + '\n'.join(self.where) + "}" + "FILTER { " +
self.filt.serialize(format="trig") + "}")
