java.cmake

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# In PB look in /usr/local/java/jdk1.8-64 even if ENV{JAVA_HOME} is unset
# TODO: integrate with storage/ndb/CMakeLists.txt
FIND_PACKAGE(Java COMPONENTS Runtime)
IF(NOT JAVA_FOUND)
  IF(DEFINED ENV{JAVA_HOME})
    # Could not find Java in the specific location set by JAVA_HOME
    # or in standard paths, don't search further
    MESSAGE(FATAL_ERROR "Could NOT find Java: neither in specified "
      "JAVA_HOME=" $ENV{JAVA_HOME} " or standard location")
  ENDIF()
  # Prefer Java with same bit size as current build
  SET(_bit_suffix "-64")

  # Use well known standard base
  SET(_base_path /usr/local/java/)

  # Search for version in specified order
  SET(_preferred_versions
    1.8
    1.7
    1.6)

  FOREACH(_version ${_preferred_versions})
    SET(_path ${_base_path}jdk${_version}${_bit_suffix})
    MESSAGE(STATUS "Looking for Java in ${_path}...")
    SET(ENV{JAVA_HOME} ${_path})
    FIND_PACKAGE(Java ${_version} COMPONENTS Runtime)
    IF(JAVA_FOUND)
      # Found java, no need to search further
      MESSAGE(STATUS "Found Java in ${_path}")
      BREAK()
    ENDIF()
  ENDFOREACH()

  IF(NOT JAVA_FOUND)
    # Could not find Java in well known locations either
    MESSAGE(FATAL_ERROR "Could NOT find suitable version of Java")
  ENDIF()
ENDIF()

GET_FILENAME_COMPONENT(Java_JAVA_bin ${Java_JAVA_EXECUTABLE} PATH)
MESSAGE(STATUS "Java_JAVA_EXECUTABLE is ${Java_JAVA_EXECUTABLE}")
MESSAGE(STATUS "Java_JAVA_bin is ${Java_JAVA_bin}")