jniHelper.h

#pragma once
#include <jni.h>
#include <android/log.h>
#include <string>
#include <vector>

namespace oxygine
{
    using namespace std;

#define STRINGIZE_DETAIL(x) #x
#define STRINGIZE(x) STRINGIZE_DETAIL(x)

    template <bool D>
    class LocalReferenceHolder
    {
    public:
        LocalReferenceHolder(JNIEnv* env, const char* func, const char* line): _env(env), _func(func), _line(line)
        {
            if (D)
                __android_log_print(ANDROID_LOG_DEBUG, "SDL", "LocalReferenceHolder enter: %s %s", _func, _line);
            _env->PushLocalFrame(16);
        }


        ~LocalReferenceHolder()
        {
            _env->PopLocalFrame(0);

            if (D)
                __android_log_print(ANDROID_LOG_DEBUG, "SDL", "LocalReferenceHolder left: %s %s", _func, _line);
        }

        JNIEnv* _env;
        const char* _func;
        const char* _line;
    };

#define LOCAL_REF_HOLDER(env) LocalReferenceHolder<false> _lr_(env, __func__, STRINGIZE(__LINE__));
#define LOCAL_REF_HOLDER_D(env) LocalReferenceHolder<true> _lr_(env, __func__, STRINGIZE(__LINE__));

    class notFound {};

#define JNI_NOT_NULL(v) if (!v) { __android_log_print(ANDROID_LOG_DEBUG, "SDL", "NOTNULL! %d %s", __LINE__, __FILE__); throw notFound();}


    JNIEnv* jniGetEnv(void);

    std::string jniGetString(JNIEnv* env, jstring jstr);
    void        jniGetStringArray(vector<std::string>& res, JNIEnv* env, jobjectArray jarray);
    jobjectArray jniGetObjectStringArray(const vector<std::string>& src, JNIEnv* env);

}