Understanding the Model Layer - Oracle ADF 11gR2 Development Beginner's Guide - page 64

Time for action - creating an association between EmpEO and
DeptEO objects
Carry out the following steps to create an associaion between EmpEO and DeptEO objects:
1. Select the New opion from the File menu and select ADF Business Component
from the Business Tier.
2. Enter the package name as com.empdirectory.model.association and the
name as EmpEOToDeptEOAssoc in the Create Associaion wizard. The package
structure for all these business objects can be predefined from the Tools |
Preferences | ADF Business Components | Packages secion.
3. Click on the Next > buton to create an associaion between the enity objects.
Select the value of Cardinality as * to 1 from the drop-down menu to represent
the many-to-one relaionship between EmpEO and DeptEO .
The reason for setting the relations as many-to-one is to
represent that many Employee entities are available in a
single Department entity. Department is a single entity
that represents the collection of employees in it.
4. Locate the Deptno atribute from EmpEO listed in the Source Atribute secion
and map it to the Deptno atribute of DeptEO in the Desinaion Atribute list.
5. Ater the selecion, click on the Add buton to add the associaion entry for the
atributes.
6. Click on the Next > buton to select properies for the associaion. Right now,
you can accept the default seings in the Opions for the Business Components
secion in this chapter.
7. Click on the Finish buton in the Summary secion to complete the creaion of
the associaion.
What just happened?
We have now created an associaion between the EmpEO and DeptEO . xml files. The accessor
atribute for DeptEO is created in EmpEO , and for EmpEO one accessor is created in DeptEO .
This can be configured in the Accessor secion of the associaion object. The associaion
relaionship is referenced in the following diagram: