Class: EnjuAccessor

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

Overview

An instance of this class holds the parsing result of a natural language query as anlyzed by Enju.

Instance Method Summary collapse

Constructor Details

#initialize(enju_cgi_url) ⇒ EnjuAccessor 



8
9
10
11
12
 
# File 'lib/enju_accessor/enju_accessor.rb', line 8

def initialize(enju_cgi_url)
  @enju_cgi = RestClient::Resource.new(enju_cgi_url)
  @sentencer = TextSentencer.new
  @tid_base, @rid_base = 0, 0
end

Instance Method Details

#get_parse(sentence) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/enju_accessor/enju_accessor.rb', line 14

def get_parse (sentence)
  begin
    response = @enju_cgi.get :params => {:sentence=>sentence, :format=>'so'}
  rescue => e
    raise IOError, "Abnormal behavior of the Enju CGI server: #{e.message}."
  end

  parse = case response.code
  when 200             # 200 means success
    raise "Empty input." if response =~/^Empty line/
    r = response.encode("ASCII-8BIT").force_encoding("UTF-8").to_s
    read_parse(sentence, r)
  else
    raise IOError, "Abnormal response from the Enju CGI server."
  end

  parse
end

#parse_sentence(sentence, offset_base = 0, mode = '') ⇒ Object 



98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
 
# File 'lib/enju_accessor/enju_accessor.rb', line 98

def parse_sentence (sentence, offset_base = 0, mode = '')
  @tid_base, @rid_base = 0, 0 unless mode == 'continue'

  toks, cons = get_parse(sentence)

  denotations = []
  tid_mapping = {}
  idx_last = 0
  toks.each do |id, tok|
    id = tid_mapping[id] = 'T' + (tok[:idx] + @tid_base).to_s
    denotations << {id:id, span:{begin: tok[:beg] + offset_base, end: tok[:end] + offset_base}, obj: tok[:pos]}
    idx_last = tok[:idx]
  end

  # puts toks.map{|t| t.to_s}.join("\n")

  cons.each do |id, con|
    thead = con[:sem_head]
    thead = cons[thead][:sem_head] until thead.start_with?('t')
    con[:thead] = thead
  end

  relations = []
  rid_num = @rid_base
  toks.each do |id, tok|
    unless tok[:args].empty?
      tok[:args].each do |type, arg|
        arg = cons[arg][:thead] if arg.start_with?('c')
        next if tid_mapping[arg].nil?
        relations << {id: 'R' + rid_num.to_s, subj: tid_mapping[arg], obj: tid_mapping[id], pred: type.to_s.downcase + 'Of'}
        rid_num += 1
      end
    end
  end

  @tid_base = @tid_base + idx_last + 1
  @rid_base = rid_num

  {:denotations => denotations, :relations => relations}
end

#parse_text(text) ⇒ Object 



157
158
159
160
161
162
163
164
165
166
167
168
169
 
# File 'lib/enju_accessor/enju_accessor.rb', line 157

def parse_text (text)
  segments = @sentencer.segment(text)

  denotations, relations = [], []
  segments.each_with_index do |s, i|
    mode = (i == 0)? nil : 'continue'
    annotation = parse_sentence(text[s[0]...s[1]], s[0], mode)
    denotations += annotation[:denotations]
    relations += annotation[:relations]
  end

  {:text=> text, :denotations => denotations, :relations => relations}
end

#read_parse(sentence, r) ⇒ Object 



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
84
85
86
87
88
89
90
91
92
93
94
95
96
 
# File 'lib/enju_accessor/enju_accessor.rb', line 33

def read_parse (sentence, r)
  toks = {}
  cons = {}

  adjustment = 0

  # r is a parsing result in SO format.
  lines = r.split(/\r?\n/)

  idx = 0
  lines.each do |line|  # for each line of analysis
    b, e, attr_str = line.split(/\t/)
    b = b.to_i
    e = e.to_i

    node = Nokogiri::HTML.parse('<node ' + attr_str + '>')
    attrs = node.css('node').first.to_h

    if attrs['tok'] == ""
      base = attrs['base']

      b += adjustment
      base.each_char{|c| adjustment += (1 - c.bytesize) if c !~ /\p{ASCII}/}
      e += adjustment

      id = attrs['id']
      pos = attrs['pos']
      pos = attrs['base'] if [',', '.', ':', '(', ')', '``', '&apos;&apos;'].include?(pos)
      pos.sub!('$', '-DOLLAR-')
      pos = '-COLON-' if pos == 'HYPH'
      toks[id] = {beg: b, end:e, word:sentence[b ... e], idx:idx, base:base, pos:pos, cat:attrs['cat'], args:{}}
      toks[id][:args][:arg1] = attrs['arg1'] if attrs['arg1']
      toks[id][:args][:arg2] = attrs['arg2'] if attrs['arg2']
      toks[id][:args][:arg3] = attrs['arg3'] if attrs['arg3']
      toks[id][:args][:mod] = attrs['mod'] if attrs['mod']
      idx += 1
    end
  end

  lines.each do |line|  # for each line of analysis
    b, e, attr_str = line.split(/\t/)
    b = b.to_i
    e = e.to_i

    node = Nokogiri::HTML.parse('<node ' + attr_str + '>')
    attrs = node.css('node').first.to_h

    if attrs['cons'] == ""
      id = attrs['id']
      head = attrs['head']
      sem_head = attrs['sem_head']
      cat = attrs['cat']
      cons[id] = {head:head, sem_head: sem_head, cat:cat}
    end
  end

  # puts sentence
  # puts toks.map{|t| t.to_s}.join("\n")
  # puts cons.map{|c| c.to_s}.join("\n")
  # puts "-----"
  # exit

  [toks, cons]
end

#tag_sentence(sentence, offset_base = 0, mode = '') ⇒ Object 



139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
 
# File 'lib/enju_accessor/enju_accessor.rb', line 139

def tag_sentence (sentence, offset_base = 0, mode = '')
  @id_base = 0 unless mode == 'continue'

  toks, cons = get_parse(sentence)

  denotations = []
  idx_last = 0
  toks.each do |id, tok|
    denotations << {id: 'P' + (tok[:idx] + @id_base).to_s, span: {begin: tok[:beg] + offset_base, end: tok[:end] + offset_base}, obj: tok[:pos]}
    denotations << {id: 'B' + (tok[:idx] + @id_base).to_s, span: {begin: tok[:beg] + offset_base, end: tok[:end] + offset_base}, obj: tok[:base]}
    idx_last = tok[:idx]
  end

  @id_base = @id_base + idx_last + 1

  {:denotations => denotations}
end

#tag_text(text) ⇒ Object 



171
172
173
174
175
176
177
178
179
180
181
182
 
# File 'lib/enju_accessor/enju_accessor.rb', line 171

def tag_text (text)
  segments = @sentencer.segment(text)

  denotations = []
  segments.each_with_index do |s, i|
    mode = (i == 0)? nil : 'continue'
    annotation = tag_sentence(text[s[0]...s[1]], s[0], mode)
    denotations += annotation[:denotations]
  end

  {:text=> text, :denotations => denotations}
end