JNI: Get a field's modifiers?

I'm writing a library in C++ that extends the JNI library. I want to be able to provide developers with more information about fields and methods. One piece of information will be the modifiers (access, static, final, etc...). But JNI doesn't seem to have a way of retrieving this information. Am I missing something? Or is there a workaround?

Thanks for your time!