I want to make sure that all fields of a Class should be primitive type or collection of primitive type:

class MyClass {
 String a;
 int b;
 float c;
 int[] d;
 List<String>;
}

How can I achieve that?
I've tried the following code to make part of it works

javaField.rawType.isPrimitive // check whether the field is primitive type
javaField.rawType.simpleName == "String" // check whether it's String

But how can I check whether the field is an Array of primitive type, such as int[] byte[], or a List of primitive type, such as List<String>, etc?

In other words:

• How can I know the generic type inside a List<T>?
• How to describe an Array of a primitive type?