PRA05-Jose-InheritanceAndAbstraction

[jc-programs]

PRA05

Remarks

• Modified endpoints
  As MenuItem is an abstract class /api/menuitem disapears and there is a new endpoint for each subclass:

  • /api/maincourse
  • /api/dessert

• Added endpoints functions to demonstrate subclass-specific operations

  • /api/maincourse/vegan
  • /api/dessert/sugarfree

Tasks

1. Refactor MenuItem to Abstract Class

   • Convert the existing MenuItem class to an abstract class
   • Identify common properties and methods to keep in the abstract class

2. Create Subclasses

   • Create two subclasses: MainCourse and Dessert
   • Implement specific properties and methods for each subclass

3. Create Interface Class

   • Design an interface (e.g., IMenuItem) with common methods for menu items
   • Ensure the abstract MenuItem class implements this interface

4. Implement JPA Inheritance Strategy

   • Use the @Inheritance annotation with strategy = InheritanceType.TABLE_PER_CLASS
   • Adjust entity mappings for the abstract class and subclasses

5. Update Repository and Service Classes

   • Modify existing repository interfaces to work with the new class hierarchy
   • Update service classes to handle the abstract class and its subclasses

6. Create Test Classes

   • Develop test classes for the new class structure
   • Include tests for inheritance-specific scenarios

7. Update API Endpoints

   • Modify existing endpoints to work with the new class hierarchy
   • Add new endpoints if necessary to demonstrate subclass-specific operations