Class: EntityExtractor

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

Instance Method Summary collapse

Constructor Details

#initialize(input, fieldoutname, *extractfield) ⇒ EntityExtractor

Returns a new instance of EntityExtractor.



7
8
9
10
11
12
 
# File 'lib/entityextractor.rb', line 7

def initialize(input, fieldoutname, *extractfield)
  @input = JSON.parse(input)
  @fieldoutname = fieldoutname
  @extractfield = *extractfield
  @output = Array.new
end

Instance Method Details

#extract(type, minchar, ignoreterms, terms, ignorefields, caseinfo, mapto, *append) ⇒ Object 



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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
 
# File 'lib/entityextractor.rb', line 99

def extract(type, minchar, ignoreterms, terms, ignorefields, caseinfo, mapto, *append)
   flag = 0
  
   h = HandleInput.new(terms, ignorefields, caseinfo)
   extractlist = h.detecttype

   @input.each do |i|
     if i.length == 2
       i = @input
       flag = 1
     end

     addlist = Array.new
     
     # Generate set terms list
     if type == "set"
       @extractfield.each do |f|
         extractTerms(extractlist, i, addlist, f)
       end
       
       if mapto
         i[@fieldoutname] = h.mapout(addlist, mapto)
       else
         i[@fieldoutname] = addlist
       end
       @output.push(i)
     
     # Generate ALLCAPS terms list
     elsif type == "ALLCAPS"
       @extractfield.each do |f|
         savefield = i[f].to_s + " "
         parseALLCAPS(i[f].to_s, i, minchar, addlist, ignoreterms, savefield, f)
       end
       
       i[@fieldoutname] = addlist
       @output.push(i)

     # Extract dates
     elsif type == "date"
       @extractfield.each do |f|
         d = ExtractDates.new(i[f])

         appendhash = Hash.new
         append.each do |a|
           appendhash[a] = i[a]
         end

         outhash = d.chunk(appendhash)
         @output.push(outhash) if !outhash.empty?
       end

     # Extract both set terms and ALLCAPS
     elsif type == "both"
       @extractfield.each do |f|
         savefield = i[f].to_s + " "
         parseALLCAPS(i[f].to_s, i, minchar, addlist, ignoreterms, savefield, f)
         extractTerms(extractlist, i, addlist, f)
       end

       if mapto
         i[@fieldoutname] = h.mapout(addlist, mapto)
       else
         i[@fieldoutname] = addlist
       end

       @output.push(i)
     end

     if flag == 1
       break
     end
   end 
end

#extractTerms(extractlist, i, addlist, field) ⇒ Object

Extract terms input from preset list



15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
# File 'lib/entityextractor.rb', line 15

def extractTerms(extractlist, i, addlist, field)
  count = 0
  downcased = i[field].to_s.downcase
    
  # Check the item for each term
  extractlist.each do |t, c|
    count+=1
    if c == true
      if i[field].to_s.include? t
        addlist.push(t)
      end
    else
      if downcased.include? t.downcase
        addlist.push(t)
      end
    end
  end
end

#genJSON ⇒ Object

Generates JSON output



95
96
97
 
# File 'lib/entityextractor.rb', line 95

def genJSON
  JSON.pretty_generate(@output)
end

#getExtract ⇒ Object

Get list of just extracted terms by occurrence



76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
 
# File 'lib/entityextractor.rb', line 76

def getExtract
  extracthash = Hash.new
  
  # Generate hash of all extracted terms
  @output.each do |i|
    i[@fieldoutname].each do |e|
      if extracthash.has_key? e
        extracthash[e] += 1
      else
        extracthash[e] = 1
      end
    end
  end
  
  # Sort hash
  return Hash[extracthash.sort_by { |k, v| v}]
end

#parseALLCAPS(toParse, i, minchar, addlist, ignoreterms, savefield, extractfield) ⇒ Object

Parses terms in all caps



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
 
# File 'lib/entityextractor.rb', line 35

def parseALLCAPS(toParse, i, minchar, addlist, ignoreterms, savefield, extractfield)
  if toParse =~ (/[A-Z]{#{minchar}}/)
    index = toParse =~ (/[A-Z]{#{minchar}}/)
    charnum = 0
    
    # Find word in all caps
    toParse.each_char do |c|
      if charnum >= index
        if toParse[c] == toParse[c].upcase && toParse[c] !~ (/[[:punct:]]/) && toParse[c] !~ (/[[:digit:]]/)
          charnum += 1
        else break
        end
      else
        charnum += 1
      end
    end

    # Remove any extra characters
    if toParse[charnum-2] == " "
      charnum = charnum-3
    elsif toParse[charnum-1] == " "
      charnum = charnum-2
    else charnum = charnum-1
    end
    
    # Filter out terms in ignoreterms array
    if !(ignoreterms.include? toParse[index..charnum])
      addlist.push(toParse[index..charnum])
    end
    
    parsedstring = toParse[0..charnum]
    toParse.slice! parsedstring
    parseALLCAPS(toParse, i, minchar, addlist, ignoreterms, savefield, extractfield)

  # If there are no (more) results, append addlist to JSON
  else
    i[extractfield] = savefield
  end
end