We are now going to input some code in order to illustrate the business-object pattern. However, we must again pay attention to the fact that there is likely another approach to getting the results. For instance, we could use an O-R Mapping (JPA or Hibernate technology) to map the entities.
As an example, the Professor entity has an n-to-n relationship with the Discipline entity, which is done with a JPA annotation. However, we know that there are many more use cases here than simply mapping entities.
We will use ProfessorBO, Professor, Discipline, ProfessorDAO, and DisciplineDAO. Let's take advantage of the classes shown in the Session Façade example. We made a small change in the AcademicFacadeImpl class. Now, this Session Façade uses a BO called ProfessorBO to handle the business related...
