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import org.aspectj.lang.annotation.*;
class Mood {
public final static Mood HAPPY=new Mood();
}
// this interface can be outside of the aspect
interface Moody {
Mood getMood(int i);
};
// this implementation can be outside of the aspect
class MoodyImpl implements Moody {
private Mood mood = Mood.HAPPY;
public Mood getMood(int i) {
return mood;
}
}
@Aspect
public class MoodIndicator {
// here is the actual ITD syntax when using @AspectJ
// public static is mandatory
// the field type must be the introduced interface. It can't be a class.
@DeclareParents(value="C", defaultImpl=MoodyImpl.class)
Moody introduced;
// @Before("execution(* *.*(..)) && this(m)")
// public void feelingMoody(Moody m) {
// System.out.println("I'm feeling " + m.getMood());
// }
public static void main(String []argv) {
((Moody)new C()).getMood(7);
}
}
class C {
}
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