title: How do I "convert" a jobject class to a complex C++ type?
body: <p>I have a Java class that matches a C++ class.  The java class is named <code>SDClass_JNI</code> and the C++ class is called <code>SDClass</code>. I pass the Java class as a <code>jobject</code> param to my JNI method.  In that JNI method, I want to then convert that <code>jobject</code> passed in as a param in my JNI method to the "matching" C++ method.  (e.g. <code>SDClass_JNI</code> -> <code>SDCLass</code>). How can I do this?</p>