Class: SecId::CUSIP

Inherits:
Base
  • Object
show all
Defined in:
lib/sec_id/cusip.rb

Overview

en.wikipedia.org/wiki/CUSIP

Constant Summary collapse

ID_REGEX = 
/\A
  (?<identifier>
    (?<cusip6>[A-Z0-9]{5}[A-Z0-9*@#])
    (?<issue>[A-Z0-9*@#]{2}))
  (?<check_digit>\d)?
\z/x.freeze

Constants inherited from Base

Base::CHAR_TO_DIGIT, Base::CHAR_TO_DIGITS

Instance Attribute Summary collapse

Attributes inherited from Base

#check_digit, #full_number, #identifier

Instance Method Summary collapse

Methods inherited from Base

check_digit, restore!, #restore!, #to_s, valid?, #valid?, valid_format?, #valid_format?

Constructor Details

#initialize(cusip) ⇒ CUSIP

Returns a new instance of CUSIP.



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# File 'lib/sec_id/cusip.rb', line 15

def initialize(cusip)
  cusip_parts = parse cusip
  @identifier = cusip_parts[:identifier]
  @cusip6 = cusip_parts[:cusip6]
  @issue = cusip_parts[:issue]
  @check_digit = cusip_parts[:check_digit]&.to_i
end

Instance Attribute Details

#cusip6 ⇒ Object (readonly)

Returns the value of attribute cusip6.



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# File 'lib/sec_id/cusip.rb', line 13

def cusip6
  @cusip6
end

#issue ⇒ Object (readonly)

Returns the value of attribute issue.



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# File 'lib/sec_id/cusip.rb', line 13

def issue
  @issue
end

Instance Method Details

#calculate_check_digit ⇒ Object

Raises:



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# File 'lib/sec_id/cusip.rb', line 23

def calculate_check_digit
  return mod_10(modified_luhn_sum) if valid_format?

  raise InvalidFormatError, "CUSIP '#{full_number}' is invalid and check-digit cannot be calculated!"
end