Re: [aspectj-users] Matching declared annotations by annotation paramete

[Andy Clement <andrew.clement@xxxxxxxxx>]

Hi,

It works for me (AspectJ 1.6.12.M2):

=== Code2.java ===
import java.lang.annotation.*;

@Retention(RetentionPolicy.RUNTIME)
@interface Sample {
  String value();
}

@Retention(RetentionPolicy.RUNTIME)
@interface Added {
}

aspect SampleAspect {
 declare @field : @Sample("matches") * *: @Added;
}

public class Code2 {

  public static void main(String []argv) throws Exception {
    // should fail
    System.out.println(Code2.class.getDeclaredField("i").getAnnotation(Added.class));
    // should work
    System.out.println(Code2.class.getDeclaredField("j").getAnnotation(Added.class));
  }


  @Sample("foo")
  int i;

  @Sample("matches")
  int j;

}
===
ajc -1.5 Code2.java -showWeaveInfo
'int j [RuntimeVisibleAnnotations]' of type 'Code2' (Code2.java) is
annotated with @Added field annotation from 'SampleAspect'
(Code2.java:13)
	
java Code2
null
@Added()


It is possible that there are issues when the classes are in separate
files but I don't know your exact setup.  If you have a scenario that
isn't working like the above, please raise a bugzilla - include the
testcode if you can.

thanks
Andy

On 2 September 2011 06:49, Zoran Regvart <zregvart+aspectj@xxxxxxxxx> wrote:
> Hi!
> it would be rather nifty if one could match on actual parameters of
> the annotation, but I can't seem to find a way to match annotations by
> specific annotation parameters. This is what I would like to do is:
>
> aspect SampleAspect {
>  declare @field : @Sample("matches") * *: @Added;
> }
>
> so that every field annotated with @Sample whose value is "matches"
> (or generally any annotation key-value) to have additional annotation
> added (@Added)
>
> thanks!
>
> zoran
> --
> Human by day user by night
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