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Re: [aspectj-users] problem with pointcut capturing the second ar gument of a constructor call
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I finally managed to solve my own problem...the issue was not with the pointcut definition (the definition below is correct); the problem was that the around advice that followed it in the aspect declaration did not declare a return type. Unfortunately, AJDT was showing the error on the pointcut definition, not on the advice definition, so this whole time I've been trying to rewrite the pointcut to get it to work. I finally commented out everything else in the aspect (including the mis-declared around advice), and the pointcut compiled without any problems; that's what keyed me in on the problem lying with the advice, not the pointcut.
Just thought I'd pass this along to the list, in case someone else encounters a similar (misleading) error!
Thanks,
Tim
On 10/4/07,
Timothy Perrigo <tperrigo@xxxxxxxxx> wrote:
Hi Elizabeth,
You're partly correct; the pointcut should have been:
pointcut emailConstruction(String[] to) :
call(public werner.ais.battery.util.Email.new(..))
&& args(*, to,..);
With "to", instead of String[], in the args list (I originally posted a version that got changed around when I was trying out different things!); I'm following the example on page 191 of the _Eclipse AspejctJ_ book (by Colyer, Clemet, Harley, and Webster). They list several wildcard patterns for binding the second parameter of an argument list:
args(*, arg2, *, *, *)
args(*, arg2, ..)
args(..,arg2,..)
args(..,arg2,*, *, *)
Where arg2, in my case, is "to". The first and last ones won't work for me, because they specify a determinate number of parameters after arg2; I'm trying to write a pointcut which will capture 2 constructors-- one with 2 arguments after "to", and one with a variable number (varargs) parameter after "to". For both, I know that "to" is the second parameter, but I don't know how many arguments will follow it, so the second option above seemed to be the best choice, but I cannot seem to get it to compile. Even with changing "String[]" to "to" in the args list, it still give me the same compile error: "Syntax error on token ";", Type expected after this token".
I did also try the way you suggest: "args(*, String[] to, ..)", but that gives me 2 errors: the original error, and "Syntax error on token "to"; ")" expected", so I don't think that's the way to go. (Thanks for the suggestions, though-- it did help me find a mistake!).
This is driving me nuts..If anyone has any suggestions, I'd really appreciate it!
Thanks,
Tim
Hi
Tim
Is the
problem that you have declared you are collecting context "emailConst(String[]
to)" but you haven't bound it to any args?
i.e.
should it be "&& args(*, String[] to,
..);"
Elizabeth
This really has me stumped...according to everything
I've read, I think the pointcut below should accomplish what I need, but I
cannot get it to compile (I'm getting the following compile error:
"Syntax error on token ";", Type expected after this token").
Here is
the pointcut definition:
pointcut
emailConstruction(String[] to) :
call(public werner.ais.battery.util.Email.new(..))
&& args(*, String[] ,..);
I'm trying to
define a pointcut on a constructor call for the Email class, and I want to
capture the second argument (which is a String array). The error message
is coming from the last line of the pointcut (the args(*, String[], ..)
part). I'm stumped...Does anyone know what I might be doing wrong?
Any suggestions would be very much
appreciated!
Thanks,
Tim
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