Class: CommerceUnits::Converter

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

Defined Under Namespace

Classes: MismatchDimension, WrongType

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#origin_value ⇒ Object

Returns the value of attribute origin_value.



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# File 'lib/commerce_units/converter.rb', line 12

def origin_value
  @origin_value
end

#target_unit ⇒ Object

Returns the value of attribute target_unit.



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# File 'lib/commerce_units/converter.rb', line 12

def target_unit
  @target_unit
end

Class Method Details

.convert(value: value, unit: unit) ⇒ Object 



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# File 'lib/commerce_units/converter.rb', line 3

def convert(value: value, unit: unit)
  new.tap do |c|
    c.target_unit = unit
    c.origin_value = value
  end.coerce
end

Instance Method Details

#coerce ⇒ Object

Raises:



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# File 'lib/commerce_units/converter.rb', line 14

def coerce
  return origin_value if target_unit == origin_unit
  raise MismatchDimension, "Unable to convert #{origin_unit} to #{target_unit}" if _mismatch_dimension?
  _base_to_target_transform _origin_to_base_transform origin_value
end

#origin_unit ⇒ Object 



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# File 'lib/commerce_units/converter.rb', line 20

def origin_unit
  origin_value.unit
end