def get_existing_process_list(self):
if self.get_file_content() is not None:
process_object_list = []
for json_process in json.loads(self.get_file_content()):
process = Process(json_process['process_name'])
json_task_list = json_process['task_list']
task_list = []
for json_task in json_task_list:
task = Task()
task.start_time = json_task['start_time']
task.end_time = json_task['end_time']
task_list.append(task)
process.task_list = task_list
process_object_list.append(process)
return process_object_list
else:
return None
