Class: Cubicle::Difference

Inherits:
CalculatedMeasure show all
Defined in:
lib/cubicle/difference.rb

Instance Attribute Summary collapse

Attributes inherited from Measure

#aggregation_method

Attributes inherited from Member

#alias_list, #condition, #expression, #expression_type, #field_name, #name, #options

Instance Method Summary collapse

Methods inherited from CalculatedMeasure

#to_js_keys

Methods inherited from Measure

#default_aggregation_method, #distinct_count?, #expression

Methods inherited from Member

#included_in?, #matches, #to_js_keys, #to_js_value

Constructor Details

#initialize(member_name, left, right, opts = {}) ⇒ Difference

Returns a new instance of Difference.



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# File 'lib/cubicle/difference.rb', line 5

def initialize(member_name,left,right,opts={})
  @left, @right = left, right
  #opts[:expression]="(value.#{denominator} > 0 && value.#{numerator} ? value.#{numerator}/value.#{denominator} : 0)"
  super(member_name,opts)
end

Instance Attribute Details

#left ⇒ Object (readonly)

Returns the value of attribute left.



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# File 'lib/cubicle/difference.rb', line 4

def left
  @left
end

#right ⇒ Object (readonly)

Returns the value of attribute right.



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# File 'lib/cubicle/difference.rb', line 4

def right
  @right
end

Instance Method Details

#aggregate(values) ⇒ Object 



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# File 'lib/cubicle/difference.rb', line 11

def aggregate(values)
  0
end

#depends_on ⇒ Object 



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# File 'lib/cubicle/difference.rb', line 22

def depends_on
  [left,right]
end

#finalize_aggregation(aggregation) ⇒ Object 



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# File 'lib/cubicle/difference.rb', line 15

def finalize_aggregation(aggregation)
  l = aggregation[left].to_f
  r = aggregation[right].to_f

  aggregation[name] = l - r
end