java - Pointcuts on inherited methods (in a class design-agnostic context) -

i fiddling around aspectj , came idea don't seem able implement (story of life).

i have defined aspect :

package my.package;  import org.aspectj.lang.annotation.*; import org.aspectj.lang.proceedingjoinpoint;  @aspect public class myaspect {      @pointcut("execution(* *(..)) && this(o)")     public void instancemethod(object o) {}      @pointcut("within(@marker *)")     public void methodsfrommarkedclasses() {}      @around("methodsfrommarkedclasses() && instancemethod(o)")     public object markedmethodsadvice(proceedingjoinpoint joinpoint, object o) throws throwable {         // awesome stuff         return null; //<- not actual return, added head wouldn't hurt     } } 

i have defined @marker annotation empty.

the idea have advice markedmethodsadvice execute time method called on object of class marked @marker. (and here're tricky parts) :

---

case 1

if said method inherited class not marked see example :

given

package my.package; public class alpha {     public void methoda() {} } 

when

package my.package; @marked public class beta extends alpha {} 

then

/* should trigger advice */ new beta().methoda(); 

---

case 2

if said method called on object of subclass (liskov)

given

@marked public class beta extends alpha { //still extends coherent previous example     public void methodb() {} } 

when

package my.package; public class gamma extends beta { } 

then

/* should trigger advice */ new gamma().methodb(); 

---

(and since i'm greedy ask bonus one)

case 3

if said method declared on subclass

given

@marked public class beta extends alpha {} //still extends coherent previous example 

when

package my.package; public class gamma extends beta {     public void methodc() {} } 

then

/* should trigger advice */ new gamma().methodc(); 

---

the aspectj documentation seems state possible

execution(public void middle.*()) 

picks out method executions public methods returning void , having no arguments either declared in, or inherited by, middle, if methods overridden in subclass of middle

so did wrong ?

you try annotate @marker annotation @inherited annotation. subclasses should inherit @marker annotation.

java.lang.annotation.inherited  @inherited public @interface marked{  }