NAME
Business::AU::ABN - Validate and format Australian Business Numbers
SYNOPSIS
# Create a new validated ABN object
use Business::AU::ABN;
my $ABN = new Business::AU::ABN( '12 004 044 937' );
# Validate in a single method call
Business::AU::ABN->validate_abn( '12 004 044 937' );
# Validate in a single function call
Business::AU::ABN::validate_abn( '12 004 044 937' );
# The validate_abn function is also importable
use Business::AU:ABN 'validate_abn';
validate_abn( '12 004 044 937' );DESCRIPTION
The Australian Business Number ( ABN ) is a government allocated number required by all businesses in order to trade in Australia. It is intented to provide a central, universal, and unique identifier for all businesses.
It's also rather neat, in that it is capable of self-validating. Much like a credit card number does, a simple algorithm applied to the digits can confirm that the number is valid. ( Although the business may not actually exist ). The checksum algorithm was specifically designed to catch situations in which you get two digits the wrong way around, or something of that nature.
Business::AU::ABN provides a validation/formatting mechanism, and an object form of an ABN number. ABNs are reformatted into the most preferred format, '01 234 567 890'.
The object itself automatically stringifies to the it's formatted number, so you can do things like print "Your ABN $ABN looks OK" and other things of that nature.
Highly flexible validation
Apart from the algorithm itself, most of this module is aimed at making the validation mechanism as flexible and easy to use as possible.
With this in mind, the validate_abn sub can be accessed in ANY form, and will just "do what you mean". See the method details for more information.
Also, all validation will take just about any crap as an argument, and not die or throw a warning. It will just return false.
METHODS
new $string
The new method creates a new Business::AU::ABN object. Takes as argument a value, and validates that it is correct before creating the object. As such if an object is provided that passes $ABN->isa('Business::AU::ABN'), it IS a valid ABN and does not need to be checked.
Returns a new Business::AU::ABN on success, or sets the error string and returns false if the string is not an ABN.
$ABN->validate_abn
When called as a method on an object, validate_abn isn't really that useful, as ABN objects are already assumed to be correct, but the method is included for completeness sake.
Returns the correctly formatted ABN (which is also 'true' in boolean context) if the ABN is valid, or false if not.
Business::AU::ABN->validate_abn $string
When called as a static method, validate_abn takes a string as an argument and attempts to validate it as an ABN.
Returns the correctly formatted ABN (which is also 'true' in boolean context) if the ABN is valid. Returns false otherwise.
Business::AU::ABN::validate_abn $string
When called directly as a fully referenced function, validate_abn responds in exactly the same was as for the static method above.
Returns the correctly formatted ABN (which is also 'true' in boolean context) if the ABN is valid. Returns false otherwise.
validate_abn $string
The validate_abn function can also be imported to your package and used directly, as in the following example.
use Business::AU::ABN 'validate_abn';
my $abn = '01 234 567 890';
print "Your ABN is " . validate_abn($abn) ? 'valid' : 'invalid';The imported function reponds identically to the fully referenced function and the static method.
Returns the correctly formatted ABN (which is also 'true' in boolean context) if the ABN is valid. Returns false otherwise.
to_string
The to_string method returns the ABN as a string. This is also the method called by the stringification overload.
errstr
When validate_abn or new return false, a message describing the problem can be accessed via any of the following.
# Global variable
$Business::AU::ABN::errstr
# Class method
Business::AU::ABN->errstr
# Function
Business::AU::ABN::errstr()TO DO
Add the method ACN to get the older Australian Company Number from the ABN, which is a superset of it.
SUPPORT
Bugs should be reported via the CPAN bug tracker at
http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Business%3A%3AAU%3A%3AABNFor other issues, contact the author
AUTHORS
Adam Kennedy ( maintainer )
cpan@ali.as
http://ali.as/COPYRIGHT
Copyright (c) 2003-2004 Adam Kennedy. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the LICENSE file included with this module.