Pass complex types from Java to C++

Question

Hi,
I am new to JNI and I read some online documentation. I was wondering how difficult it is to pass complex Java types to C++ functions. I guess I need to map the Java class to a C++ class somehow. I could not find any useful examples that do this. For example, I have the Java classes:
class SomeClassA
   double someFieldA;
class SomeClassB
   ArrayList<SomeClassA> collA;
   double someFieldB;
}Now I would like to map this to the following C++ class:
class some_class_a
  double _some_field_a;
class some_class_b
  vector<some_class_a> _coll_a;
  double _some_field_b;
};I do not need to access Java objects from my C++, I just want the objects to be "serialized" into C++ objects.
Is there an example that does something like this? Or should I use something different than JNI?
Thank you,
Andrej

Answer 1

I do not need to access Java objects from my C++, I just want the objects to be "serialized" into C++ objects.Then you need to access java objects.
Is there an example that does something like this? Write java code to access the data of the object (and via that the sub collection).
That code represents exactly the same thing that you must do in JNI calls in your C code. Naturally excluding populating the C structures themselves of course. Most a matter of calling methods and accessing attributes. That is all in the JNI docs and there are plenty of examples of both of those.