Get method parameters with specific annotation in aspect in scala using java reflection

I am using aop in scala using aspectj. I have a method

def delete(@Id id:Long, name:String)

How can I get the value of id in my aspect file.

@Around("execution (* com.myapp.Employee.deleteEmployee(..))")   
def message(joinPoint: ProceedingJoinPoint): Object = {    
  val methodSignature =joinPoint.getSignature.asInstanceOf[MethodSignature] 
  //get the value of the field id
  joinPoint.proceed   
}

I am not able to get the values.

If I try

val res = methodSignature.getMethod.getParameterAnnotations
res.map(annotations => println("size = "+annotations.length))

It is always printing the size as 0.