[JAVA] Benchmark app can be build without OpenCV, fixed CMakeLists fo…

…r samples (openvinotoolkit#4)

modules/java_api/samples/CMakeLists.txt

@@ -1,29 +1,64 @@
 # Copyright (C) 2020 Intel Corporation
 
-find_package(OpenCV) 
-if(NOT OpenCV_FOUND)
-    message(WARNING ".jar file wasn't found for OpenCV. Java samples won't be build.")
-    return()
-endif()
+# Find OpenCV components if exist
+
+find_package(OpenCV QUIET)
 
 if(EXISTS "${OpenCV_INSTALL_PATH}/share/java")
-    file(GLOB_RECURSE java_opencv_src ${OpenCV_INSTALL_PATH}/share/java/*.jar)
+    file(GLOB_RECURSE JAVA_OPENCV_SRC ${OpenCV_INSTALL_PATH}/share/java/*.jar)
 elseif(EXISTS "${OpenCV_INSTALL_PATH}/bin")
-    file(GLOB java_opencv_src ${OpenCV_INSTALL_PATH}/bin/*.jar)
+    file(GLOB JAVA_OPENCV_SRC ${OpenCV_INSTALL_PATH}/bin/*.jar)
 endif()
 
-if(EXISTS "${java_opencv_src}")
-    file(GLOB java_samples ${CMAKE_CURRENT_SOURCE_DIR}/samples/*)
-    foreach(sample IN LISTS java_samples)
-        if(IS_DIRECTORY "${sample}")
-            get_filename_component(sample_name "${sample}" NAME)
-            file(GLOB_RECURSE sample_src ${sample}/*.java)
-            add_jar("${sample_name}_jar"
-                    SOURCES ${sample_src}
-                            ${PROJECT_SOURCE_DIR}/samples/ArgumentParser.java
-                    OUTPUT_NAME ${sample_name} 
-                    OUTPUT_DIR ${CMAKE_LIBRARY_OUTPUT_DIRECTORY} 
-                    INCLUDE_JARS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/* ${java_opencv_src})
+#
+# ie_add_java_sample(NAME <target name>
+#               SOURCES <source files>
+#               [DEPENDENCIES <dependencies>]
+#               [OPENCV_DEPENDENCIES]
+#
+macro(ie_add_java_sample)
+    set(options OPENCV_DEPENDENCIES)
+    set(oneValueArgs NAME)
+    cmake_parse_arguments(IE_SAMPLE "${options}" "${oneValueArgs}"
+                          "" ${ARGN} )
+
+    # Collect sample sources
+
+    file(GLOB_RECURSE SAMPLE_SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/*.java)
+    list(APPEND SAMPLE_SOURCES ${PROJECT_SOURCE_DIR}/samples/ArgumentParser.java)
+
+    # Set InferenceEngine component
+
+    set(IE_JAVA_SRC ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/inference_engine_java_api.jar)
+
+    # Add OpenCV components if required
+
+    if(IE_SAMPLE_OPENCV_DEPENDENCIES) 
+        if(EXISTS "${JAVA_OPENCV_SRC}")
+            list(APPEND IE_JAVA_SRC ${JAVA_OPENCV_SRC})
+        else()
+            message(WARNING "OPENCV .jar file is disabled or not found, " ${IE_SAMPLE_NAME} " skipped")
+            return()
         endif()
-    endforeach()
-endif()
+    endif()
+
+    # Create .jar file from sources
+
+    add_jar("${IE_SAMPLE_NAME}_jar"
+                    SOURCES ${SAMPLE_SOURCES}
+                    OUTPUT_NAME ${IE_SAMPLE_NAME}  
+                    OUTPUT_DIR ${CMAKE_LIBRARY_OUTPUT_DIRECTORY} 
+                    INCLUDE_JARS ${IE_JAVA_SRC})          
+    add_dependencies(${IE_SAMPLE_NAME}_jar inference_engine_jar)
+endmacro()
+
+# Collect all samples subdirectories
+
+file(GLOB samples_dirs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *)
+
+foreach(dir ${samples_dirs})
+    if(IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/${dir})
+            # Include subdirectory to the project.
+            add_subdirectory(${dir})
+    endif() 
+endforeach()

modules/java_api/samples/benchmark_app/CMakeLists.txt

@@ -0,0 +1,5 @@
+# Copyright (C) 2020 Intel Corporation
+
+get_filename_component(sample_name "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
+
+ie_add_java_sample(NAME ${sample_name})

modules/java_api/samples/face_detection_java_sample/CMakeLists.txt

@@ -0,0 +1,6 @@
+# Copyright (C) 2020 Intel Corporation
+
+get_filename_component(sample_name "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
+
+ie_add_java_sample(NAME ${sample_name} OPENCV_DEPENDENCIES)
+

modules/java_api/samples/face_detection_sample_async/CMakeLists.txt

@@ -0,0 +1,6 @@
+# Copyright (C) 2020 Intel Corporation
+
+get_filename_component(sample_name "${CMAKE_CURRENT_SOURCE_DIR}" NAME)
+
+ie_add_java_sample(NAME ${sample_name} OPENCV_DEPENDENCIES)
+