| Accessing parameter names in advice [message #49540] |
Mon, 07 March 2005 11:01  |
Eclipse User |
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Originally posted by: simon.heinzle.adnovum.ch
SORRY about the post before, something went wrong....
I'm currently writing an Enter/Leave tracing aspect for Debugging. The
output of it should be somewhat like "Entering method m_name(p_name =
p_value,...)".
Is there a way of getting the names(identifiers) of the parameters in an
advice generic?
With thisJoinPoint only the parameter values and their types can be
queried. A solution like
before (String target, int count) :
execution(* *.calculateValue(String, int))
&& args(target, count)
{
// Output: "Entering method calculateValue(target="+target ...
}
is too bulky.
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| Re: Accessing parameter names in advice [message #49570 is a reply to message #49540] |
Mon, 07 March 2005 15:39  |
| Eclipse User |
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Originally posted by: adrian.redpointsoft.com
Simon,
I haven't tried this, but it looks promising.
before( ) : execution( * *.calculateValue() ) {
Object args[] = thisJoinPoint.getArgs();
for( int i = 0; i < args++; i++ ) {
// do stuff
}
}
-adrian.
Simon Heinzle wrote:
> SORRY about the post before, something went wrong....
>
> I'm currently writing an Enter/Leave tracing aspect for Debugging. The
> output of it should be somewhat like "Entering method m_name(p_name =
> p_value,...)".
>
> Is there a way of getting the names(identifiers) of the parameters in an
> advice generic?
> With thisJoinPoint only the parameter values and their types can be
> queried. A solution like
>
>
> before (String target, int count) : execution(*
> *.calculateValue(String, int))
> && args(target, count) {
> // Output: "Entering method calculateValue(target="+target ...
> }
>
>
> is too bulky.
>
>
>
>
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| Re: Accessing parameter names in advice [message #49658 is a reply to message #49540] |
Tue, 08 March 2005 13:32 |
| Eclipse User |
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Originally posted by: adrian_colyer.uk.ibm.com
Simon Heinzle wrote:
> Is there a way of getting the names(identifiers) of the parameters in an
> advice generic?
You can do the following:
pointcut traced() : execution(* *(..)); // whatever you want here
before() : traced {
CodeSignature sig = (CodeSignature) thisJoinPoint.getSignature();
StringBuffer traceRecord = new StringBuffer();
traceRecord.append("Entering method ");
traceRecord.append(sig.getDeclaringTypeName());
traceRecord.append(".");
traceRecord.append(sig.getName());
traceRecord.append("(");
Object[] args = thisJoinPoint.getArgs();
String[] pNames = sig.getParameterNames();
for (int p=0; p < pName.length; p++) {
traceRecord.append(pNames[p]);
traceRecord.append("=");
traceRecord.append(args[p] == null ? "null" : args[p].toString());
traceRecord.append(" ");
}
traceRecord.append(")");
log(traceRecord.toString());
}
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