How to get annotations of an annotation?

[evilpan]

For example, some class is annotated by RestController:

@RestController
@RequestMapping({"/rest/"})
public class DemoRestController {

   @GetMapping({"/foo"})
   public String foo() throws Exception {
     return "foo";
   }
}

which @RestController is annotated by other annotations:

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Controller
@ResponseBody
public @interface RestController {

	@AliasFor(annotation = Controller.class)
	String value() default "";

}

I can get AnnotationUsage of a JavaSootClass via:

cls.getAnnotations(Optional.of(view));

But how to get list of annotation of each annotation usage of above results? i.e. @Controller, @ResponseBody, etc.

[kadirayk]

Did you try getting the SootClass of RestController and then calling .getAnnotations on it?

[JonasKlauke]

Yeah this works.
For example if au is your AnnotationUsage contained in the resulting list of cls.getAnnotations(Optional.of(view)); then you get the AnnotationType by calling au.getAnnotation(). The AnnotationType can be used to get the SootClass by view.getClass(au.getAnnotation()) and on this you can call getAnnotations() again view.getClass(au.getAnnotation()).ifPresent(javaSootClass -> javaSootClass.getAnnotations(Optional.of(view)));

[evilpan]

Thanks!