Class: Ikku::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/ikku/node.rb

Constant Summary collapse

STAT_ID_FOR_NORMAL = 
0
STAT_ID_FOR_UNKNOWN = 
1
STAT_ID_FOR_BOS = 
2
STAT_ID_FOR_EOS = 
3

Instance Method Summary collapse

Constructor Details

#initialize(node) ⇒ Node

Returns a new instance of Node.

Parameters:

  • node (Natto::MeCabNode) 


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# File 'lib/ikku/node.rb', line 11

def initialize(node)
  @node = node
end

Instance Method Details

#analyzable? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 15

def analyzable?
  !bos? && !eos?
end

#bos? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 19

def bos?
  stat == STAT_ID_FOR_BOS
end

#conjugation1 ⇒ Object 



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# File 'lib/ikku/node.rb', line 23

def conjugation1
  feature[4]
end

#conjugation2 ⇒ Object 



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# File 'lib/ikku/node.rb', line 27

def conjugation2
  feature[5]
end

#element_of_ikku? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 35

def element_of_ikku?
  normal?
end

#eos? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 31

def eos?
  stat == STAT_ID_FOR_EOS
end

#feature ⇒ Object 



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# File 'lib/ikku/node.rb', line 39

def feature
  @feature ||= CSV.parse(@node.feature)[0]
end

#first_of_ikku? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 43

def first_of_ikku?
  case
  when !first_of_phrase?
    false
  when type == "記号" && !["括弧開", "括弧閉"].include?(subtype1)
    false
  else
    true
  end
end

#first_of_phrase? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 54

def first_of_phrase?
  case
  when ["助詞", "助動詞"].include?(type)
    false
  when ["非自立", "接尾"].include?(subtype1)
    false
  when subtype1 == "自立" && ["する", "できる"].include?(root_form)
    false
  else
    true
  end
end

#inspect ⇒ Object 



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# File 'lib/ikku/node.rb', line 67

def inspect
  to_s.inspect
end

#last_of_ikku? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 71

def last_of_ikku?
  case
  when ["名詞接続", "格助詞", "係助詞", "連体化", "接続助詞", "並立助詞", "副詞化", "数接続", "連体詞"].include?(type)
    false
  when conjugation2 == "連用タ接続"
    false
  when conjugation1 == "サ変・スル" && conjugation2 == "連用形"
    false
  when type == "動詞" && ["仮定形", "未然形"].include?(conjugation2)
    false
  when type == "名詞" && subtype1 == "非自立" && pronunciation == "ン"
    false
  else
    true
  end
end

#last_of_phrase? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 88

def last_of_phrase?
  type != "接頭詞"
end

#normal? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ikku/node.rb', line 92

def normal?
  stat == STAT_ID_FOR_NORMAL
end

#pronunciation ⇒ Object 



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# File 'lib/ikku/node.rb', line 96

def pronunciation
  feature[8]
end

#pronunciation_length ⇒ Object 



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# File 'lib/ikku/node.rb', line 100

def pronunciation_length
  @pronunciation_length ||= begin
    if pronunciation
      pronunciation_mora.length
    else
      0
    end
  end
end

#pronunciation_mora ⇒ Object 



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# File 'lib/ikku/node.rb', line 110

def pronunciation_mora
  if pronunciation
    pronunciation.tr("ぁ-ゔ","ァ-ヴ").gsub(/[^アイウエオカ-モヤユヨラ-ロワヲンヴー]/, "")
  end
end

#root_form ⇒ Object 



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# File 'lib/ikku/node.rb', line 116

def root_form
  feature[6]
end

#stat ⇒ Object 



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# File 'lib/ikku/node.rb', line 120

def stat
  @node.stat
end

#subtype1 ⇒ Object 



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# File 'lib/ikku/node.rb', line 124

def subtype1
  feature[1]
end

#subtype2 ⇒ Object 



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# File 'lib/ikku/node.rb', line 128

def subtype2
  feature[2]
end

#subtype3 ⇒ Object 



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# File 'lib/ikku/node.rb', line 132

def subtype3
  feature[3]
end

#surface ⇒ Object 



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# File 'lib/ikku/node.rb', line 136

def surface
  @node.surface
end

#to_s ⇒ Object 



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# File 'lib/ikku/node.rb', line 140

def to_s
  surface
end

#type ⇒ Object 



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# File 'lib/ikku/node.rb', line 144

def type
  feature[0]
end