1) Use UML State Model
Modeling Objects: Refer to the Asg_RH documentation to model the Reservation/Order objects.
Modeling requirements: The reference exercise does not provide enough information to help you model the order object. Please refer to the travel website of the hotel booking now, and analyze the various situations surrounding the order as much as possible until the order ends the order through a sales event (counter sales).
状态集合S = {new order, completed, confirmed, submitted, payed, cancelled};
事件集合E = {create an order, complete, check order, submit order, modify, make a payment, cancell};
State transition diagram:
2) Study the Taobao return process activity diagram and model the state of the return business object
状态集合S = {waiting seller agrees，waiting goods，confirm goods，refund succeed，refund failed，Customer service negotiation，closed}；
事件集合 E = {make a return request，seller agrees request，seller disagree request，buyer returns goods，agree to a refund，disagree to a refund，time out，help customer service}；
State transition diagram:
