How to post Java String to java entryPoint method with CCharPointer type using GraalVM?

Question

I am trying to create a shared library(so with header and lib files) of a java code using graalvm.

There will be one java method with 2 parameters of type String which I will call from Java

My NativeNativeImpl java method analysis with annotation CEntryPoint looks like this:

@CEntryPoint(name = "Java_net_luculent_liems_license_apinative_Native_analysis")
public static CCharPointer analysis(Pointer jniEnv, Pointer clazz,
                               @CEntryPoint.IsolateThreadContext long isolateId, CCharPointer dataCharStr) {
    //logic code
}

My Native java code to call analysis looks like this :

//declare native method 
private static native String analysis(long isolateThread, CCharPointer dataDomStr);

public static String analysisDataDom() {
        System.loadLibrary("nativeimpl");
        long isolateThread = createIsolate();
        String helloStr = "Hello from Java";
        //how to convert helloStr to CCharPointer type ???
        return analysis(isolateThread, helloStr);
}

My question likes comment: how to post java String value to CCharPointer for native method?

Thanks for all answers!

question from:https://stackoverflow.com/questions/65857256/how-to-post-java-string-to-java-entrypoint-method-with-ccharpointer-type-using-g

Answer 1

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