M206 - TMA05 Question 2
Class association diagram
Part 2
Class Association Diagram for Caravan Site
- Class: Administration
- There is only one instance of this class and it is the orchestrating instance.
- Class: SiteStaff
- Responsibilities:
- Maintains employee name and employee number.
- Keeps track of Manager/Worker structure.
- Class: Employees
- Responsibilities:
- Employees can work at sites and belong to site staff.
- Records name and employee number.
- Class: SiteManager
- is-a-kind-of: Employee
- Responsibilities:
- Class: SiteWorker
- is-a-kind-of: Employee
- Responsibilities:
- Maintains SiteWorker hourly pay rate
- Class: Caravan
- Responsibilities
- Maintains the caravan grade, identity number
- Keeps Track of Caravan instances allocated to a Site Instance
- Class: Contract
- Responsibilities:
- Maintains the current contract, includes start date, length of contract.
- Class: HolidayGroup
- Responsibilities: Maintains the holiday group leaders name, address and number of previous stays.
- Invariant1:
- Any given instance of Employee is associated with via the Assigned-To association with one or more Site instances.
- SiteWorker instance is associated with the SiteStaff instance via the Consists-Of association, where the
- SiteStaff is associated with a SiteManager via the is-Managed-By association, that is the association of instance
- of Site via the Responsible-For association.
- lnvariant2
- Each HolidayGroup is associated with instances of Caravan in the following way:
- That same instance of Contract is associated with a single instance of Caravan via the Applies-to association. That same instance of Site is associated with Caravan via the Allocated-To-Holiday-Group association.