Java EE 8 Design Patterns and Best Practices

Applications with complex business rules

Let's say that we want to increase the complexity of the system (let's say the system needs to contain more functions, for example). Let's also imagine that a college has members that consist of professors, employees, and students. Suppose there is a member entity that almost matches the member table in the related database. In addition, we know that professors, students, and employees are members of the college, and for that reason, they have common characteristics that every member should have. However, the professor, student, and employee also have their own characteristics. A professor's main characteristics are that they are a member who teaches and has a Masters or PhD qualification.

Similarly, ...