ActionScript 3.0 Design Patterns.pdf - VideoTutorials-bg.com

Examples 4-18 and 4-19 provide the concrete components for Dick and Jane classes.
Each class just needs a string value for soul and numeric values for goodness and
vice—all inherited properties from the Component class. Save Example 4-18 as Dick.as,
and Example 4-19 as Jane.as.
Example 4-18. Dick.as
package
{
public class Dick extends Component
{
public function Dick( )
{
soul = "Dick's soul\n";
goodness=0;
vice=0;
}
}
}
Example 4-19. Jane.as
package
{
public class Jane extends Component
{
public function Jane( )
{
soul = "Jane's soul\n";
goodness=0;
vice=0;
}
}
}
These concrete component classes are exactly like the previous examples we’ve
examined, except we have two instead of one. Furthermore, instead of using a single
string variable, two additional numeric variables are added, along with their assigned
values. Otherwise, they’re just the same.
In these two concrete classes, the properties are inherited directly from the abstract
Component class. No overrides or other special adjustments are needed. This is
because the Dick and Jane classes are components, both to be decorated by the decorator
classes. The overrides that generate unique methods and characteristics for the
concrete decorators are accomplished by the decorator classes. Therefore, overrides
by the concrete component classes are unnecessary.
150 | Chapter 4: Decorator Pattern