将JNI基本类型放入同一数组

Question

I am trying to write static Java method that with given parameters, searches and invokes Method.

This method is supposed to have variable amount of arguments, and must be called from C++. I tried few options, but i cannot get it done. Is this even possible?

So far, i can store what types it contains and what position, and i can put jobject and jstring in same array.

If this is not possible, is it possible to refer either methodID found from JNI with Java's reflection or somehow pass reference to object in long. Such structure would be ok, since i can cast 64 bit Integer to everything else.

Answer 1

If you need that array in JNI, use the jvalue union type as your array type. Ex: jvalue myArray* = { (jint) 1, (jlong) 1000, (jboolean) false }

Java does not support jvalue nor does it support variadic functions, so if you need to pass that array of primitives to JNI from Java as a way of working around the limitation, you should use an Object array with primitive object wrappers like java.lang.Integer and call the value functions depending on type in JNI. Its possible, just a pain to implement.