1. Jing Zhang Thomas Cottenier Aswin van den Berg Jeff Gray
Aspect Interference and Composition in the Motorola Aspect-Oriented Modeling Weaver
Jing Zhang
Thomas Cottenier
Aswin van den Berg
Jeff Gray
University of Alabama at Birmingham

2. Motorola WEAVR A Profile for modeling Aspects in UML 2.0
Pointcut Composition

5. X, … Q, R, S, Y
(N, j)
(M, i) D

6. X, … Q, R, S, T, U, V, W, …, Z
(N, i)
(M, i)
(O, j)
D D2

7. X, … Q,R, S, Y Tu
(N, j) Ts
(A, i)
Ts’
X, … Q,R, S Q, R, S Y

8. Motorola WEAVR
Aspect deployment entities

9. Motorola WEAVR An Agent for visualizing Joinpoints and Analyze Joinpoint Effects

10. Motorola WEAVR

11. Figure 4. Aspect composition.
package1 <- Aspect1,Aspect2,Aspect3,Aspect4
ALL – package1 <- Aspect3,Aspect4

12. Aspect3 is hidden by Aspect2:
Aspect3 will be inactivated when both Aspect2 and Aspect3 match at the same join point Aspect2 => ¬Aspect3
Aspect4 is dependent on Aspect3:
the presence of Aspect4 implies that Aspect3 has to be present at the same join point as well Aspect4 => Aspect3

13. Aspect Interference and Composition in WEAVR Conclusions
Contribution: approach that allows precedence relationships to be specified at the modeling level to prevent undesirable interferences between aspects
Also:
- Composition of Transition Pointcuts maintains properties
- Transition Pointcut Designators make sense