Generate JNI Bridge and Java interfaces from C++

Question

I know that it is possible to generate the JNI given a Java implementation using javac but is there a way to do the opposite (a "cjava")?

So if I have something like this:

mypackage/mylib.h:

void helloWorld();

mypackage/mylib.c:

#include <iostream>

void helloWorld() {
    std::cout << "Hello World!" << std::endl;
}

Shouldn't it be possible to generate the JNI like

mylib-jni.c:

#include "mypackage/mylib."

JNIEXPORT jlong JNICALL Java_mypackage_helloWorld() {
    helloWorld();
}

and

Mylib.java:

package mypackage;

public class Mylib {    
    public native void helloWorld();    
}

etc.

Somehow I am not stumbling upon something like that.

Have you looked at JNA (and the related JNAerator) or SWIG?

Botje
– Botje

2019-08-02 11:42:55 +00:00
Commented Aug 2, 2019 at 11:42 — Botje
– Botje, Commented Aug 2, 2019 at 11:42

Carsten Spräner · Accepted Answer · 2019-09-03 13:17:36Z

0

Try antlr. It has a grammar file for C++ and gives you full control.

For the generation of java you could use the cgV19 i hust released. My picture is:

parse the C++ file with antlr and build a model loader for cgV19 with it. cgV19 uses this C++ parser to load a model give cgV19 a cartridge that can generate your java files from that model

answered Sep 3, 2019 at 13:17

Carsten Spräner

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