cookbook

[gitmo/Moose.git] / lib / Moose / Cookbook / Recipe2.pod

=pod

=head1 NAME

Moose::Cookbook::Recipe2

=head1 SYNOPSIS

  package BankAccount;
  use strict;
  use warnings;
  use Moose;
  
  has 'balance' => (isa => 'Int', is => 'rw', default => 0);
  
  sub deposit {
      my ($self, $amount) = @_;
      $self->balance($self->balance + $amount);
  }
  
  sub withdraw {
      my ($self, $amount) = @_;
      my $current_balance = $self->balance();
      ($current_balance >= $amount)
          || confess "Account overdrawn";
      $self->balance($current_balance - $amount);
  }
  
  package CheckingAccount;
  use strict;
  use warnings;	
  use Moose;
  
  extends 'BankAccount';
  
  has 'overdraft_account' => (isa => 'BankAccount', is => 'rw');	
  
  before 'withdraw' => sub {
  	my ($self, $amount) = @_;
  	my $overdraft_amount = $amount - $self->balance();
  	if ($overdraft_amount > 0) {
  		$self->overdraft_account->withdraw($overdraft_amount);
  		$self->deposit($overdraft_amount);
  	}
  };

=head1 DESCRIPTION

=head1 AUTHOR

Stevan Little E<lt>stevan@iinteractive.comE<gt>

=head1 COPYRIGHT AND LICENSE

Copyright 2006 by Infinity Interactive, Inc.

L<http://www.iinteractive.com>

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

=cut