Method: Processing::LibraryLoader#load_java_library

Defined in:
lib/jruby_art/library_loader.rb

#load_java_library(library_name) ⇒ Object

HACK: For pure java libraries, such as the ones that are available on this page: processing.org/reference/libraries/index.html that include native code, we mess with the ‘Java ClassLoader’, so that you don’t have to futz with your PATH. But it’s probably bad juju.



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# File 'lib/jruby_art/library_loader.rb', line 49

def load_java_library(library_name)
  library_name = library_name.to_sym
  return true if @loaded_libraries.include?(library_name)
  jpath = get_library_directory_path(library_name, 'jar')
  jars = get_library_paths(library_name, 'jar')
  return false if jars.empty?
  jars.each { |jar| require jar }
  platform_specific_library_paths = get_platform_specific_library_paths(jpath)
  platform_specific_library_paths = platform_specific_library_paths.select do |ppath|
    FileTest.directory?(ppath) && !Dir.glob(File.join(ppath, '*.{so,dll,jnilib}')).empty?
  end
  unless platform_specific_library_paths.empty?
    platform_specific_library_paths << java.lang.System.getProperty('java.library.path')
    new_library_path = platform_specific_library_paths.join(java.io.File.pathSeparator)
    java.lang.System.setProperty('java.library.path', new_library_path)
    field = java.lang.Class.for_name('java.lang.ClassLoader').get_declared_field('sys_paths')
    if field
      field.accessible = true
      field.set(java.lang.Class.for_name('java.lang.System').get_class_loader, nil)
    end
  end
  @loaded_libraries[library_name] = true
end