Recipe16.2.Declaring Inheritance Between Classes

Recipe 16.2. Declaring Inheritance Between Classes

Problem

You want to introduce a new inheritance relationship between two classes.

Solution

Use the declare parents statement to specify a particular class that extends from another class.

Discussion

Example 16-2 shows how a new inheritance relationship can be specified for the MyClass class.

Example 16-2. Adding a new inheritance relationship between classes

public aspect IntroduceInheritanceRecipe {                  declare  parents : MyClass extends AnotherClass; }

Figure 16-2 shows the class structure of the MyClass class before and after the aspect in Example 16-2 is applied.

Figure 16-2. The MyClass class before and after the aspect introduces a new inheritance relationship

See Also

Recipe 16.3 shows how to apply new interfaces to an existing class using aspects.