Advanced Tutorial

In this advanced tutorial, you will improve the ACME Employment Management System (built in the introductory tutorial) to manage additional information. You will update the introductory application with new project information and reuse existing components from previous applications.

You will also learn how to:

• Work with self-relationships

• Create the following advanced mapping types: object type mappings, aggregate object mappings, direct collection mappings, and many-to-many mappings

• Implement indirection and value holders

• Use inheritance

• Create transformations

• Work with the Automap tool

• Use multiple tables for one class

• Create and generate code

This advanced tutorial adds the ability to track employees' current projects, managers, and contract period. You will reuse components from the introductory tutorial.

In addition to the Employee, Address, and PhoneNumber classes from the introductory tutorial (see "Overview"), the advanced tutorial uses these classes:

• EmploymentPeriod – Defines the contract term for contractors and the hire date for ACME employees. Each Employee class has an EmploymentPeriod.

• ResponsibilityList – Each Employee has a collection of text that describes the employee's job.

• BaseProject – Maintains information about a particular project and the people working on it. The Project class contains two subclasses: LargeProject and SmallProject. Each Employee can be involved in more than one project.

• TeamLeader – Each Project can have a team leader (the Employee responsible for the project.

• Manager – Each Employee may have a manager and a collection of managed employees.

Figure B-1 illustrates the object model for the advanced tutorial.