Re: [aspectj-users] getting varargs to work in args and advise

[Ramnivas Laddad <ramnivas@xxxxxxxxxxxxxxx>]

call(* myTestClass.setStrFld(String,int...)) will select the following method

class myTestClass {

    <ANY TYPE> setStrFld(String a, int... b) {

    }

}

You probably want to use thisJoinPoint.getArgs() in the advice to access all arguments.

-Ramnivas

On Mon, Mar 22, 2010 at 3:31 AM, Ashank <k_arvind_shankar@xxxxxxxxx> wrote:

Hello,

I was trying out the varargs feature in aspectJ but cannot get it to work
unfortunately. I read through
http://www.eclipse.org/aspectj//doc/next/adk15notebook/varargs-in-pcds.html
and a few posts but tried to test the example but cannot get it to work. I'm
not getting syntax errors but nothing is getting. I have pasted my simple
code here. Please help me identify where I am going wrong.

Class I am trying to advise:

package arvind.AspectJTest;

import java.util.ArrayList;

public class myTestClass {
       String strFld = "InitVal";

       public String getStrFld() {
               return strFld;
       }

       public void setStrFld(String inStr) {
               strFld = inStr;
       }

       public void setStrFld(String inStr, String inStr2) {
               strFld = inStr + inStr2;
       }

       public void setStrFld(String inStr, int myInt) {
               strFld = inStr+","+Integer.toString(myInt);
       }

       public void setStrFld(String someStr, int dividend, int divisor) {
               strFld = someStr + "," + ((float)dividend/divisor);
       }

       public static void main(String[] args) {
               myTestClass d = new myTestClass();
               System.out.println("Initially, StrFld is  " + d.getStrFld() + ". Calling
string,string");
               d.setStrFld(args[0],args[1]);
               System.out.println("Secondly, StrFld is  " + d.getStrFld()+ ". Calling
string,int");
               d.setStrFld(args[0],Integer.parseInt(args[1]));
               System.out.println("Thirdly, StrFld is  " + d.getStrFld()+ ". Calling
string,int,int");
               d.setStrFld(args[0],Integer.parseInt(args[1]),Integer.parseInt(args[2]));
               System.out.println("Finally, StrFld is  " + d.getStrFld());
       }
};

Aspects that I am using for advice:
1.) InittAspect.java:

package arvind.AspectJTest;

abstract aspect InitAspect{
       pointcut PCpart1(): !within(arvind.*) && within(arvind.AspectJTest.*);
       pointcut PCpart2(): !within(InitAspect);
       pointcut catchClasses(): PCpart1() && PCpart2();}
}

2.) testProceed.java:

package arvind.AspectJTest;

aspect testProceed extends InitAspect{
       pointcut catchAllMethods(String myStr, int[] restOfArgs): catchClasses()&&
               call(* myTestClass.setStrFld(String,int...)) &&
               within(myTestClass) && args(myStr,restOfArgs);

       Object around(String myStr, int[] restOfArgs):catchAllMethods(myStr,
restOfArgs) {

System.out.println("------------------------------------------------------------------");
               System.out.println(thisJoinPoint);

               System.out.println("around Advice: before proceed: ");
               System.out.println("First string argument is " + myStr + ". Executing the
method now...");
               Object result = proceed(myStr,restOfArgs);
               System.out.println("Result is " + result);

               System.out.println("around Advice: After proceed: ");

System.out.println("------------------------------------------------------------------");
               return result;
       }
}

When I try to compile them using ajc as follows, I get no weave info:
C:\arvind\AspectJTest>ajc -showWeaveInfo -outjar aspectjar.jar -outxml
InitAspect.java testProceed.ja
va myTestClass.java

C:\arvind\AspectJTest>

My classpath and path are correct.

Please tell me where I am making mistakes. Also, eventually I would like to
able to use args(String, Object+...) in the pointcut but i don't know if its
possible. I read through the following code and got the impression that what
i am trying to do should work now but I there is no weaving going on. Please
help.

Thanks.
-Arvind

http://old.nabble.com/Matching-varargs-with-subtypes%3A-call%28*-*.*%28Object%2B...%29%29-td22076248.html#a22076248
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