def query(jpath_query, json={}, vars={}, interpreter=None, as_tuple=False):
if interpreter is None:
interpreter = Interpreter()
module = interpreter.get_binder("jpath").create_query(jpath_query)
wrapped_vars = utils.singleton(translate.json_to_jpath(vars))
result = module.call_with_values(
context.DynamicContext(translate.json_to_jpath(json), 1, 1),
[wrapped_vars])
if len(result) == 0 and not as_tuple:
return None
elif len(result) == 1 and not as_tuple:
return translate.jpath_to_json(utils.get_single(result))
else:
return tuple(translate.jpath_to_json(v) for v in result)
def call(self, module_name, function_name, *args):
"""
Calls the named function in the named module with the specified JSON
arguments. The JSON result is then returned.
"""
interpreter = self.interpreter_constructor()
module = interpreter.bind_module("jpath", module_name)
function = module.get_function(function_name)
wrapped_args = [translate.json_to_jpath(v) for v in args]
result = function.call_with_values(self.make_context(), wrapped_args)
return translate.jpath_to_json(result)
def process_result(self, result, update):
if update is None:
update = True
for value in result: # result is a Sequence
if not isinstance(result, d.Update):
update = False
break
if update:
self.storage.apply_updates(result)
result = None
else:
if len(result) == 0: # Result is the empty sequence
result = None
else: # Try to get the single resulting item
result = translate.jpath_to_json(utils.get_single(result))
self.storage.commit()
return result
