Checking if outer class has Doc Comments

I am trying to check if there are javadocs on the top of a class , I did something like this  but I am getting it  even for inner classes , is there a better way to solve this.

@Override
public void visitClass(PsiClass aClass) {
  boolean hasDocComment = false;
  for(PsiElement element :aClass.getChildren()) {
    if(element instanceof PsiDocComment) {
      hasDocComment = true;
    }
  }