This project has two aims: (1) to learn how to connect a Java application to a backend database; (2) to learn how to use part of the object serialization and Java Security API. We will connect it to a backend database and also use MD5 algorithm to do security checks.
When the user wants to close the application, besides storing the data to a backend database, application need to also serialize customer objects into an external file. This will be used to check if somebody is trying to attack Customer data while the application is not running. This will do this as follows: when user closes the application, application will make Customer objects persistent to a file, generate an MD5 for that file and write it into another external file. When the application is loaded again, application will read regenerate the MD5 for the serialized objects in external file and check if it is the same with the MD5 that you stored when the application was closed. If they are the same, that means the serialized objects are not modified, if they are not then application will need to warn the user that the data has been updated.
The overall requirements are based on this class diagram, which is also summarised below: • The main application called ResManApp will be used to maintain information about staff and customers. ResManApp will also have the main method and will provide the overall interaction with the application. Therefore, this class should include the main method where an instance of this class is constructed and the menu of commands is displayed to the user. The required methods are as follows.
o menu(): This method will display the interaction menu to the user;
o addStaff(): This method will add new staff to the list of Staff maintained;
o deleteStaff(): This method will be used to delete a staff.
o listStaffDetails(): This method will display the details of a staff (In the previous assignment, this was referred as getStaffDetails).
o addCustomer(): This method will add a customer.
o deleteCustomer(): This method will delete a customer.
o addBooking(): This method will receive the details of a customer and create a booking for that customer. The method needs to also get the relevant booking details.
o listCustomerDetails(): This method will display a customer details (In the previous assignment, this was called getCustomerDetails).
o displayCustomerLastBooking(): This method will display the most recent booking done by the customer.
o listCustomerOrders(): This method will display the orders made by a particular customer (In the previous assignment, this was referred as getCustomerOrder).
o listStaff(): This method will list all the staff.
o listCustomer(): This method will list all the customer.
o exit(): This method should terminate the program.
o addOrder(): This method will get the details of a customer and an order, and will create an order for that customer. In this case, the order type has to be specified, if it is online then an online order should be created. If it is being done within the restaurant, then it should be an InRestrOrder.
o listAllSaffSalary(): This method will display the salary details of all staff in the application. Depending on whether the staff is junior or senior, the salary calculation will be done via getSalary() method specified in the interface as follows: § If the staff is a seniorthen the monthly salary is calculated as follows: for every year who has been a staff (currentDateStartDate to find the number of years) who gets %10 increment on the grossSalaryYearly. This will be divided by 12. For example, if the employee is working for 2 years and the grossSalaryYearly is 12000, then he will have a salary of 1200 per month. This is because he received 1200 for the first year and 1200 for the second year as increments. § If the Staff is a junior, then the monthlySalary value will be displayed.
o listAllOrder(): This method will display all online and in restaurant orders that have been made. This will display all the orders made within the rest. and their associated bookings (if it exists). Please note that an in restaurant order can be made without a booking.
o addOrderOfBooking(): This method will get the details of a customer and a booking, and will create an order for that customer and booking. Payment interface has a method called “processPayment()”. Since in this a gui-project, we are not actually going to process payments, it just need to implement it in a simple way to display a message on the screen.
