Change Unidirectional Association to Bidirectional
You have two classes that need to use each other's features, but there is only a one-way link.
Add back pointers, and change modifiers to update both sets.
For more inforamtion see page 197 of Refactoring
Additional Comments
Doing a remove
In the example I showed an addOrder method, but I didn't show the removeOrder method. If you want to do a remove, you would write it like the add method but set the customer to null.
Class Customer ...
void removeOrder( Order arg ) {
arg.setCustomer( null );
}
Contributors
- Andy Bulka
- Don Roberts