We've covered different aspects of the restaurant management system and observed the attributes attached to the problem using various UML diagrams. Let us now explore the more practical side of things, where we will work on implementing the restaurant management system using multiple languages. This is usually the last step in an object-oriented design interview process.

We have chosen the following languages to write the skeleton code of the different classes present in the RMS:

  • Java

  • C#

  • Python

  • C++

  • JavaScript

Restaurant management system classes

In this section, we will provide the skeleton code of the classes designed in the class diagram lesson.

Note: For simplicity, we are not defining getter and setter functions. The reader can assume that all class attributes are private and accessed through their respective public getter methods and modified only through their public method functions.

Enumerations and custom data type

The following code provides the definition of the enumeration and custom data type used in the restaurant management system.

PaymentStatus: This enumeration keeps track of an order's payment status by the customer.

TableStatus: This enumeration keeps track of the table’s status.

SeatType: This enumeration represents the type of seat for a customer.

AccountStatus: This enumeration keeps track of an account's status.

OrderStatus: This enumeration keeps the customer's order status in check.

ReservationStatus: This enumeration represents the reservation status of a table.

Address: This custom datatype represents the address of the restaurant's branch or a person.

Note: JavaScript does not support enumerations, so we will be using the Object.freeze() method as an alternative. This freezes an object and prevents further modifications.

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