opencv/modules/java/jar/CMakeLists.txt

project(${the_module}_jar)

set(OPENCV_JAVA_DIR "${CMAKE_CURRENT_BINARY_DIR}/opencv" CACHE INTERNAL "")

file(REMOVE_RECURSE "${OPENCV_JAVA_DIR}")
file(REMOVE "${OPENCV_DEPHELPER}/${the_module}_jar_source_copy")

file(MAKE_DIRECTORY "${OPENCV_JAVA_DIR}/build/classes")
set(java_src_dir "${OPENCV_JAVA_DIR}/java")
file(MAKE_DIRECTORY "${java_src_dir}")

set(JAR_NAME opencv-${OPENCV_JAVA_LIB_NAME_SUFFIX}.jar)
set(OPENCV_JAR_FILE "${OpenCV_BINARY_DIR}/bin/${JAR_NAME}" CACHE INTERNAL "")

ocv_copyfiles_append_dir(JAVA_SRC_COPY "${OPENCV_JAVA_BINDINGS_DIR}/gen/java" "${java_src_dir}")

set(depends gen_opencv_java_source "${OPENCV_DEPHELPER}/gen_opencv_java_source")
ocv_copyfiles_add_target(${the_module}_jar_source_copy JAVA_SRC_COPY "Copy Java(JAR) source files" ${depends})
set(depends ${the_module}_jar_source_copy "${OPENCV_DEPHELPER}/${the_module}_jar_source_copy")

if(OPENCV_JAVA_SOURCE_VERSION)
  set(OPENCV_ANT_JAVAC_EXTRA_ATTRS "${OPENCV_ANT_JAVAC_EXTRA_ATTRS} source=\"${OPENCV_JAVA_SOURCE_VERSION}\"")
endif()
if(OPENCV_JAVA_TARGET_VERSION)
  set(OPENCV_ANT_JAVAC_EXTRA_ATTRS "${OPENCV_ANT_JAVAC_EXTRA_ATTRS} target=\"${OPENCV_JAVA_TARGET_VERSION}\"")
endif()

set(OPENCV_JAVADOC_DESTINATION "${OpenCV_BINARY_DIR}/doc/doxygen/html/javadoc" CACHE STRING "")

# Old Javadoc URL looks like this: https://docs.oracle.com/javase/6/docs/api/
# New Javadoc URL looks like this: https://docs.oracle.com/en/java/javase/11/docs/api/
set(OPENCV_JAVADOC_LINK_URL "" CACHE STRING "See details in modules/java/jar/CMakeLists.txt")
if(OPENCV_JAVADOC_LINK_URL)
  set(CMAKE_CONFIG_OPENCV_JAVADOC_LINK "link=\"${OPENCV_JAVADOC_LINK_URL}\"")
endif()

configure_file("${CMAKE_CURRENT_SOURCE_DIR}/build.xml.in" "${OPENCV_JAVA_DIR}/build.xml" @ONLY)
list(APPEND depends "${OPENCV_JAVA_DIR}/build.xml")

ocv_cmake_byproducts(__byproducts BYPRODUCTS "${OPENCV_JAR_FILE}")
add_custom_command(OUTPUT "${OPENCV_DEPHELPER}/${the_module}_jar"
    ${__byproducts}  # required for add_custom_target() by ninja
    COMMAND ${ANT_EXECUTABLE} -noinput -k jar
    COMMAND ${CMAKE_COMMAND} -E touch "${OPENCV_DEPHELPER}/${the_module}_jar"
    WORKING_DIRECTORY "${OPENCV_JAVA_DIR}"
    DEPENDS ${depends}
    COMMENT "Generating ${JAR_NAME}"
)
add_custom_target(${the_module}_jar DEPENDS "${OPENCV_DEPHELPER}/${the_module}_jar")

install(FILES ${OPENCV_JAR_FILE} OPTIONAL DESTINATION ${OPENCV_JAR_INSTALL_PATH} COMPONENT java)

add_dependencies(${the_module} ${the_module}_jar)

if(BUILD_DOCS)
  add_custom_command(OUTPUT "${OPENCV_DEPHELPER}/${the_module}doc"
    COMMAND ${ANT_EXECUTABLE} -noinput -k javadoc
    COMMAND ${CMAKE_COMMAND} -E touch "${OPENCV_DEPHELPER}/${the_module}doc"
    WORKING_DIRECTORY "${OPENCV_JAVA_DIR}"
    DEPENDS ${depends}
    COMMENT "Generating Javadoc"
  )
  add_custom_target(${the_module}doc DEPENDS "${OPENCV_DEPHELPER}/${the_module}doc")
  install(DIRECTORY ${OpenCV_BINARY_DIR}/doc/doxygen/html/javadoc
    DESTINATION "${OPENCV_DOC_INSTALL_PATH}/html"
    COMPONENT "docs" OPTIONAL
    ${compatible_MESSAGE_NEVER}
  )
  set(CMAKE_DOXYGEN_JAVADOC_NODE
    "<tab type=\"user\" url=\"./javadoc/index.html\" title=\"Java documentation\"/>"
    CACHE INTERNAL "Link to the Java documentation") # set to the cache to make it global
  add_custom_target(doxygen_javadoc DEPENDS ${the_module}doc)
  add_dependencies(opencv_docs ${the_module}doc)
else()
  unset(CMAKE_DOXYGEN_JAVADOC_NODE CACHE)
endif()