Class: CompressionTask

Inherits:
Task
  • Object
show all
Defined in:
ext/lib/CompLearnLib/CompressionTask.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cObjects) ⇒ CompressionTask

Returns a new instance of CompressionTask.



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# File 'ext/lib/CompLearnLib/CompressionTask.rb', line 35

def initialize(cObjects)
  @cObjects = cObjects.clone
  @idTotal = ""
  cObjects.each { |obj|
      idTotal << obj.to_s
  }
end

Instance Attribute Details

#idTotal ⇒ Object (readonly)

Returns the value of attribute idTotal.



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# File 'ext/lib/CompLearnLib/CompressionTask.rb', line 33

def idTotal
  @idTotal
end

Instance Method Details

#execute ⇒ Object 



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# File 'ext/lib/CompLearnLib/CompressionTask.rb', line 43

def execute()
  total = ""
  @cObjects.each { |obj|
    total << obj.value
  }
  compmethod = CLConfig.getDefaultConfig().compressor

  case compmethod.downcase

    when "bz2", "bzip2", "bzip", "bz"

    if FoundComp::FOUNDBZIP2
      reply(BZ2.compress(total).size)
    else
      fail "Sorry, bzip2 compression is not installed on this system."
    end

    when "gzip", "gz"
    if FoundComp::FOUNDGZIP
      reply(gzipCompress(total).size)
    else
      fail "Sorry, gzip compression is not installed on this system."
    end

    when "shell"
      cmd = CLConfig.getDefaultConfig().compressorCommand
      result = 0
      begin
      f = IO.popen(cmd, "w+")
      writer = Thread.new() {
        blocksize, inpos = 1024, 0
        while inpos < total.size
          wanted = total.size - inpos
          wanted = blocksize if wanted > blocksize
          inpos += f.write(total[inpos...inpos+wanted])
        end
        f.close_write
      }
      result = f.read.size
      f.close
      rescue
        puts "Got error: #{$!}"
        result = -1
      end
      reply(result)

    when "none"
      fail "Sorry, no valid compressors installed!"

    else
      fail "Sorry, compression method #{compmethod} is not supported"

  end

end