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AW: [aspectj-users] Overriding pointcuts

Hi Thiago,

 

Unfortunately this does not work. Using “target(fifo)” I get the following error message:

 

ajc *.java

/home/apel/iti_home/Entwicklung/Eigene Projekte/AOP/Semaphor/Fifo.java:25 [error] Cannot use target() to match at this location and bind a formal to type 'Fifo' - the formal is already bound to type 'Fifo'.  The secondary source location points to the problematic target().

public void Put(Value val)

^^^^^^^^^^^^^^^^^^^^^^^^^

        see also: /home/apel/iti_home/Entwicklung/Eigene Projekte/AOP/Semaphor/ExtLogging.java:3

/home/apel/iti_home/Entwicklung/Eigene Projekte/AOP/Semaphor/Fifo.java:30 [error] Cannot use target() to match at this location and bind a formal to type 'Fifo' - the formal is already bound to type 'Fifo'.  The secondary source location points to the problematic target().

public Value Get() throws NoSuchElementException

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

        see also: /home/apel/iti_home/Entwicklung/Eigene Projekte/AOP/Semaphor/ExtLogging.java:3

 

2 errors

 

 

For clarification, I send you the Fifo class:

 

public class Fifo

{

            public void Put(Value val)

            {

                        m_buf.add(val);

            }

           

            public Value Get() throws NoSuchElementException

            {

                        Value result;

                        try

                        {

                                   result = (Value)m_buf.firstElement();      

                        }

                        catch(NoSuchElementException exception)

                        {

                                   throw exception;

                        }

                        m_buf.remove(result);

                        return result;

            }

           

            public static void main(String[] args)

            {

                        Fifo fifo = new Fifo(256);

                        fifo.Put(new Value(23));

                        fifo.Put(new Value(32));

           

                        System.out.println(fifo.Get().GetInt());

            }

}

 

regards

 

Sven

 

-----Ursprüngliche Nachricht-----
Von: aspectj-users-bounces@xxxxxxxxxxx [mailto:aspectj-users-bounces@xxxxxxxxxxx] Im Auftrag von Thiago Bartolomei
Gesendet: Freitag, 21. Oktober 2005 12:55
An: aspectj-users@xxxxxxxxxxx
Betreff: Re: [aspectj-users] Overriding pointcuts

 

Hi,

try to append target to your pointcut:

pointcut log(Fifo fifo) : Logging.log(fifo) || execution(* Fifo.Get(..)) && target(fifo);

I think the problem is that the compiler needs to know what to do with your fifo variable in all cases . Without the target, the second part of the "or" would have no context exposure..

[]s
Thiago T. Bartolomei

On 10/21/05, Sven Apel <apel@xxxxxxxxxxxxxxxxxxxxxxx> wrote:

Hi,

I have a problem with overriding and reusing pointcuts. I want to extend the
set of join points captured by the "log" pointcut in the aspect "Logging":

abstract public aspect Logging
{
        pointcut log(Fifo fifo) : execution(* Fifo.Put(..)) && target(fifo);

        before(Fifo fifo) : log(fifo)
        {
                System.out.println("---> Fifo method called");
        }
}

For that I want to use a further aspect that inherits from "Logging":

public aspect ExtLogging extends Logging
{
        pointcut log(Fifo fifo) : Logging.log(fifo) || execution(*
Fifo.Get(..));
}

The above example does not work because ajc cannot bind "fifo" (inconsistent
binding).

The following example also does not work:

public aspect ExtLogging extends Logging
{
        pointcut log() : Logging.log(Fifo) || execution(* Fifo.Get(..));
}

This is because "ExtLogging.log" must have the same signature than
"Logging.log". Other variants that declare an argument list in
"ExtLogging.log" but do not pass "fifo" to "Logging.log" also do not work

Is there a possibility to override and reuse parent pointcuts that expect
arguments? Without arguments the above example works!

Thanks in advance

Sven

--
Dipl.-Inf. Sven Apel
Institute for Technical and Business Information Systems
Otto-von-Guericke-University
P.O. Box 4120, D-39016 Magdeburg, Germany
Phone: ++49 (391) 67-11899, Fax: ++49 (391) 67-12020
Room: 29/108
E-Mail: apel@xxxxxxxxxxxxxxxxxxxxxxx




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