Class: Opener::POSTaggers::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/opener/pos_taggers/base.rb,
lib/opener/pos_taggers/base/version.rb

Overview

The base POS tagger that supports Dutch and German.

Direct Known Subclasses

DE

Constant Summary collapse

VERSION = 
'2.2.1'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Base

Returns a new instance of Base.

Parameters:

  • options (Hash) (defaults to: {})

Options Hash (options):

  • :args (Array) —

    The commandline arguments to pass to the underlying Python script.



26
27
28
29
 
# File 'lib/opener/pos_taggers/base.rb', line 26

def initialize(options = {})
  @args    = options.delete(:args) || []
  @options = options
end

Instance Attribute Details

#args ⇒ Array (readonly)

Returns:

  • (Array) 


17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'lib/opener/pos_taggers/base.rb', line 17

class Base
  attr_reader :args, :options

  ##
  # @param [Hash] options
  #
  # @option options [Array] :args The commandline arguments to pass to the
  #  underlying Python script.
  #
  def initialize(options = {})
    @args    = options.delete(:args) || []
    @options = options
  end

  ##
  # Builds the command used to execute the kernel.
  #
  # @return [String]
  #
  def command
    return "python -E #{kernel} #{args.join(' ')}"
  end

  ##
  # Runs the POS tagger and returns a KAF document as a String.
  #
  # @param [String] input The input to tag.
  # @return [String]
  #
  def run(input)
    stdout, stderr, process = capture(input)

    raise stderr unless process.success?

    return stdout
  end

  protected

  ##
  # capture3 method doesn't work properly with Jruby, so
  # this is a workaround
  #
  def capture(input)
    Open3.popen3(*command.split(" ")) {|i, o, e, t|
      out_reader = Thread.new { o.read }
      err_reader = Thread.new { e.read }
      i.write input
      i.close
      [out_reader.value, err_reader.value, t.value]
    }
  end

  ##
  # @return [String]
  #
  def core_dir
    return File.expand_path('../../../../core', __FILE__)
  end

  ##
  # @return [String]
  #
  def kernel
    return File.join(core_dir, 'pos-tagger_open-nlp.py')
  end
end

#options ⇒ Hash (readonly)

Returns:

  • (Hash) 


17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'lib/opener/pos_taggers/base.rb', line 17

class Base
  attr_reader :args, :options

  ##
  # @param [Hash] options
  #
  # @option options [Array] :args The commandline arguments to pass to the
  #  underlying Python script.
  #
  def initialize(options = {})
    @args    = options.delete(:args) || []
    @options = options
  end

  ##
  # Builds the command used to execute the kernel.
  #
  # @return [String]
  #
  def command
    return "python -E #{kernel} #{args.join(' ')}"
  end

  ##
  # Runs the POS tagger and returns a KAF document as a String.
  #
  # @param [String] input The input to tag.
  # @return [String]
  #
  def run(input)
    stdout, stderr, process = capture(input)

    raise stderr unless process.success?

    return stdout
  end

  protected

  ##
  # capture3 method doesn't work properly with Jruby, so
  # this is a workaround
  #
  def capture(input)
    Open3.popen3(*command.split(" ")) {|i, o, e, t|
      out_reader = Thread.new { o.read }
      err_reader = Thread.new { e.read }
      i.write input
      i.close
      [out_reader.value, err_reader.value, t.value]
    }
  end

  ##
  # @return [String]
  #
  def core_dir
    return File.expand_path('../../../../core', __FILE__)
  end

  ##
  # @return [String]
  #
  def kernel
    return File.join(core_dir, 'pos-tagger_open-nlp.py')
  end
end

Instance Method Details

#command ⇒ String

Builds the command used to execute the kernel.

Returns:

  • (String) 


36
37
38
 
# File 'lib/opener/pos_taggers/base.rb', line 36

def command
  return "python -E #{kernel} #{args.join(' ')}"
end

#run(input) ⇒ String

Runs the POS tagger and returns a KAF document as a String.

Parameters:

  • input (String) —

    The input to tag.

Returns:

  • (String) 


46
47
48
49
50
51
52
 
# File 'lib/opener/pos_taggers/base.rb', line 46

def run(input)
  stdout, stderr, process = capture(input)

  raise stderr unless process.success?

  return stdout
end