changing 'java' module layout

modules/java/generator/src/cpp/jni_part.cpp

@@ -0,0 +1,59 @@
+#include <jni.h>
+
+#include "opencv2/opencv_modules.hpp"
+
+#ifdef HAVE_OPENCV_NONFREE
+#  include "opencv2/nonfree/nonfree.hpp"
+#endif
+
+#ifdef HAVE_OPENCV_FEATURES2D
+#  include "opencv2/features2d/features2d.hpp"
+#endif
+
+#ifdef HAVE_OPENCV_VIDEO
+#  include "opencv2/video/video.hpp"
+#endif
+
+#ifdef HAVE_OPENCV_ML
+#  include "opencv2/ml/ml.hpp"
+#endif
+
+extern "C" {
+
+JNIEXPORT jint JNICALL
+JNI_OnLoad(JavaVM* vm, void* )
+{
+    JNIEnv* env;
+    if (vm->GetEnv((void**) &env, JNI_VERSION_1_6) != JNI_OK)
+        return -1;
+
+    bool init = true;
+#ifdef HAVE_OPENCV_NONFREE
+    init &= cv::initModule_nonfree();
+#endif
+#ifdef HAVE_OPENCV_FEATURES2D
+    init &= cv::initModule_features2d();
+#endif
+#ifdef HAVE_OPENCV_VIDEO
+    init &= cv::initModule_video();
+#endif
+#ifdef HAVE_OPENCV_ML
+    init &= cv::initModule_ml();
+#endif
+
+    if(!init)
+        return -1;
+
+    /* get class with (*env)->FindClass */
+    /* register methods with (*env)->RegisterNatives */
+
+    return JNI_VERSION_1_6;
+}
+
+JNIEXPORT void JNICALL
+JNI_OnUnload(JavaVM*, void*)
+{
+  //do nothing
+}
+
+} // extern "C"