Function RethrowExceptionFromJavaToCpp

library/cpp/jni/jni.cpp:107–123

}

void RethrowExceptionFromJavaToCpp() {
    auto* env = Env()->GetJniEnv();
    if (env->ExceptionCheck()) {
        auto exc = TLocalRef(env->ExceptionOccurred());
        env->ExceptionClear();
        auto excClass = TLocalClassRef(env->GetObjectClass(exc.Get()));
        jmethodID getMessage = env->GetMethodID(excClass.Get(), "getMessage", "()Ljava/lang/String;");
        auto message = static_cast<jstring>(env->CallObjectMethod(exc.Get(), getMessage));
        std::string exceptionMsg = "<no message>";
        if (message) {
            char const* msg = env->GetStringUTFChars(message, nullptr);
            exceptionMsg = msg;
            env->ReleaseStringUTFChars(message, msg);
        }
        THROW(TJniException().append(exceptionMsg));
    }
}

void Check() {
    RethrowExceptionFromJavaToCpp();