Class Diagram for the Online Stock Brokerage System
Learn to create a class diagram for a stock brokerage system using the bottom-up approach.
In this lesson, we’ll identify and design the classes, abstract classes, and interfaces based on the requirements we have previously gathered from the interviewer in an online stock brokerage system.
Components of a stock brokerage system
We will design the online stock brokerage system using a bottom-up approach as mentioned.
Account
Account: This abstract class stores a person’s account information. It has members like account ID, name, password, account status, address, email, and phone number. There can be two types of accounts: Admin and Member.
Member: They can search the stock, place an order to buy or sell stocks, create an account, start a membership, add stocks to the wish list, add buying and selling limits, and perform transactions in many ways.
Admin: They can block or unblock members, cancel their membership, and reset passwords.
Watch list
A list of stocks that an investor keeps an eye on to profit from price drops is called a watch list. The visual representation of the Watchlist class is provided below.
Stock
A stock is also known as equity. It is a security that represents a portion of the issuing company's ownership. The Stock class will have a symbol, price, etc.
Search and stock inventory
The StockInventory class will retrieve and keep up with the most recent stock values from the StockExchange class (defined later). The StockInventory class implements the Search interface.
Stock position
All the stocks that the user owns will be included in the StockPosition class.
Stock lot
A member may purchase various lots of the same stock at various dates. The StockLot class will represent these particular lots.
Order
Members can place stock trading orders when they want to sell or acquire stock positions. There are four ...