java: use module's public headers only

modules/java/CMakeLists.txt

@@ -149,7 +149,14 @@ foreach(module ${OPENCV_JAVA_MODULES})
     file(STRINGS "${custom_header_list}" module_headers)
     ocv_list_add_prefix(module_headers "${OPENCV_MODULE_opencv_${module}_LOCATION}/")
   else()
-    set(module_headers "${OPENCV_MODULE_opencv_${module}_HEADERS}")
+    set(module_headers "")
+    # TODO Implement module's "_HEADERS_PUBLIC" variable (OpenCVModule.cmake)
+    foreach(hdr ${OPENCV_MODULE_opencv_${module}_HEADERS})
+      string(REGEX REPLACE "^.*opencv2/" "opencv2/" hdr2 "${hdr}")
+      if(NOT hdr2 MATCHES "opencv2/${m}/private.*" AND hdr2 MATCHES "^(opencv2/?.*)/[^/]+.h(..)?$" )
+        list(APPEND module_headers "${hdr}")
+      endif()
+    endforeach()
   endif()
 
   if(NOT module_headers)