building_extensible_java_frameworks_handler_invocation.java

// Get a reference to the "handle" method
Method handle = handlerType.getDeclaredMethod("handle", 
  new Class<?>[] {
    ScanContext.class, FrameworkAnnotationContext.class
  });

// Create a FrameworkAnnotationContext instance by passing the annotation to process,
// the instance being scanned and the method where the annotation is placed
FrameworkAnnotationContext<Annotation> annotationContext = new FrameworkAnnotationContext<>(annotation, instance, m);

// Invoke the "handle" method
ScanContext newContext = (ScanContext) handle.invoke(handler, scanContext, annotationContext);