Module: ChocolateDisco

Defined in:
lib/chocolate_disco.rb,
lib/chocolate_disco/java.rb,
lib/chocolate_disco/version.rb,
lib/chocolate_disco/chocolate_disco.rb

Defined Under Namespace

Modules: Java, Version

Constant Summary collapse

@@supported_mime_types = 
nil

Class Method Summary collapse

Class Method Details

.extract(path, opts = {}) ⇒ Object Also known as: lets_party!

extracts text from path, returns string, empty string or nil.

Raises:

  • (NotImplementedError) 


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# File 'lib/chocolate_disco/chocolate_disco.rb', line 41

def extract(path, opts = {})
  
  if opts[:force_mime].is_a?(String)
    mimes = [opts[:force_mime]]
  else
    mimes = MIME::Types.of(path).map { |mime| mime.simplified }
  end
  
  raise(NotImplementedError.new("MIME (#{mimes.join(', ')}) for '#{path}' is not supported by chocolate_disco.")) unless supported?(:mimes => mimes)
  
  extractor = mimes.map { |mime| Java::TextExtractionFactory.getExtractor(mime) }[0]
  
  raise(RuntimeError.new('TextExtractionFactory failed to get an instance of TextExtractor, which is impossible.')) if extractor.nil?
  
  extractor.extractText(java.io.File.new(path))
end

.supported?(opts = {}) ⇒ Boolean

returns whether or not the file is supported. :path to specify the file. :mime to specify the mime. :mimes to give an array of mimes.

Returns:

  • (Boolean) 


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# File 'lib/chocolate_disco/chocolate_disco.rb', line 18

def supported?(opts = {})
  mimes = []
  mimes << opts[:mime] if opts[:mime].is_a?(String)
  mimes += opts[:mimes] if opts[:mimes].is_a?(Array)
  
  if opts[:path].is_a?(String) && File.exists?(opts[:path]) && !File.directory?(opts[:path]) && File.file?(opts[:path])
    begin
      mimes << MIME::Types.of(opts[:path]).map { |mime| mime.simplified }
    rescue NoMethodError # begin
      raise(NotImplementedError.new("MIME types of a file '#{opts[:path]}' could not be inferred."))
    end # rescue
  end # if opts[:path].is_a?(String) && File.exists?(opts[:path]) && !File.directory?(opts[:path]) && File.file?(opts[:path])
  
  mimes.flatten!
  mimes.compact!
  mimes.uniq!
  
  mimes.map { |mime| return true if supported_mime_types.include?(mime) }
  
  false
end

.supported_mime_types ⇒ Object

returns an array of supported mime types.



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# File 'lib/chocolate_disco/chocolate_disco.rb', line 11

def supported_mime_types
  @@supported_mime_types ||= Java::SupportedMimeTypes.constants.map { |const| eval("Java::SupportedMimeTypes::#{const}") }
end