[aspectj-users] More cflow queries..

["neil loughran" <n.loughran@xxxxxxxxxxxxxxx>]

Continuing the cflow theme... ;-)

 

Is it possible to expose the context of multiple joinpoints in a cflow?

 

For instance.

 

class Driver
 {
 public static void main(String args[])
  {
  Foo f = new Foo();
  f.methodA("Hello World");
  } 
 }

 

class Foo
    {
    public void methodA(String s)
        {
        String t = s.toUpperCase();        
        }

 

    public void methodB(String s)
        {
        StringBuffer t = new StringBuffer(s);
        s = t.reverse().toString();
        methodC(s);
        }

 

    public void methodC(String s)
        {
        s=s+s;

        // etc..
        }   
    }

 

In the above example I simply process a string by passing it through different methods.  If I wanted to get the original values of the calls to MethodA and MethodC I could create separate advice for each method and perhaps create a field variable so that the advice can have access to the variable .  However if I wanted to create a single advice which exposed the original string passed to methodA and also that of methodC how would I go about it?

 

I can create advice such as which exposes all the pointcuts in the flow of Foo.methodA

 

aspect A
 {
 before () : cflow(call (void Foo.methodA(String))) && !within(A)
  {
  System.out.println("Cflow -- > "+thisJoinPoint);
  }
 }

 

but how can I create an advice which does something like the following (which doesn't work incidentally!)?

 

before(String a, String c) : args(a,c) && cflow(call (void Foo.methodA(String))) && call(void Foo.methodC(String)) && !within(A)
    {

    // where 'a' is context passed to methodA 

    // and 'c' is context passed to methodC

   

    // evaluate something based upon a and c    

    }

 

Regards

Neil Loughran