Class: Linkage::Comparators::Compare

Inherits:
Binary show all
Defined in:
lib/linkage/comparators/compare.rb

Constant Summary collapse

@@parameters = 
[:any, :static => false, :side => :first],
[String, :values => %w{> >= <= < !=}],
[:any, :same_type_as => 0, :static => false, :side => :second]
@@comparator_name = 
'compare'

Instance Attribute Summary

Attributes inherited from Linkage::Comparator

#args, #lhs_args, #rhs_args

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Binary

score_range

Methods inherited from Linkage::Comparator

[], register, score_range

Constructor Details

#initialize(*args) ⇒ Compare

Returns a new instance of Compare.



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# File 'lib/linkage/comparators/compare.rb', line 18

def initialize(*args)
  super
  @name_1 = @args[0].name
  @operator = @args[1].object
  @name_2 = @args[2].name
end

Class Method Details

.comparator_name ⇒ Object 



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# File 'lib/linkage/comparators/compare.rb', line 14

def self.comparator_name
  @@comparator_name
end

.parameters ⇒ Object 



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# File 'lib/linkage/comparators/compare.rb', line 9

def self.parameters
  @@parameters
end

Instance Method Details

#score(record_1, record_2) ⇒ Object 



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# File 'lib/linkage/comparators/compare.rb', line 25

def score(record_1, record_2)
  result =
    case @operator
    when '!='
      record_1[@name_1] != record_2[@name_2]
    when '>'
      record_1[@name_1] > record_2[@name_2]
    when '>='
      record_1[@name_1] >= record_2[@name_2]
    when '<='
      record_1[@name_1] <= record_2[@name_2]
    when '<'
      record_1[@name_1] < record_2[@name_2]
    end

  result ? 1 : 0
end