chore: import upstream snapshot with attribution

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

@@ -0,0 +1,42 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html
+
+#include "common.h"
+
+#include "opencv2/opencv_modules.hpp"
+
+#ifdef HAVE_OPENCV_FEATURES2D
+#  include "opencv2/features2d.hpp"
+#endif
+
+#ifdef HAVE_OPENCV_VIDEO
+#  include "opencv2/video.hpp"
+#endif
+
+#ifdef HAVE_OPENCV_CONTRIB
+#  include "opencv2/contrib.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;
+
+    /* 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"