C++/Java integration

[JonLT]

Hi!

I could try to explain what I would like to do, but I think a little code would be much easier to understand. So here goes:

C++ class:

class Cclass
{
  void some_C_function(int i)
  {
    printf("%d\n",i);
  }
};
 

Java class:

Class Jclass extends Cclass
{
  public void some_Java_function(int i)
  {
    some_C_function(i);
  }
}
 

C++ main:

int main()
{
  Jclass *j = new Jclass;
  j->some_Java_function(5);
 
  return 0;
}
 

So i would like to be able to call c++ functions from java and java functions from c++. The reason for all this is that i would like to be able to use Java as a scripting language for my c++ program.

Maybe the java class should not extend the c++ class but have the function available in some other way?

I've read a little about CNI - but it seems that it only enables the calling of java methods from C++, and not the other way around.

So my questing is this: Can the above be done, or should I look into some other solution to the scripting language problem.

Thanks

[JonLT]

I've found a thing called pawn - and it does what i want. Sorry about the fast posting.

[gpraghuram]

I've found a thing called pawn - and it does what i want. Sorry about the fast posting.

Is the pawn a open source tool?

Raghu

[r035198x]

...
Java class:

Class Jclass extends Cclass
{
  public void some_Java_function(int i)
  {
    some_C_function(i);
  }
}
 

...

1.) Class declarations start with the keyword class (small c) not Class.
2.) Java is not a scripting language.
3.) If you want to call c/c++ functions from Java then google JNI.

[JonLT]

pawn is open source (zLib/libpng) and lets you call c++ functions from a pawn-script and also call functions in the script from c++.

The script is compiled using a pawn-compiler and is then executed in an abstract machine (from within the c++ source code).

The compiler is also open source so it can be implemented in the host application along with the abstract machine.