MooseX::AttributeHelpers (3pm)

  package MyClass;
  use Moose;
  use MooseX::AttributeHelpers;

  has 'mapping' => (
      metaclass => 'Collection::Hash',
      is        => 'rw',
      isa       => 'HashRef[Str]',
      default   => sub { {} },
      provides  => {
          exists    => 'exists_in_mapping',
          keys      => 'ids_in_mapping',
          get       => 'get_mapping',
          set       => 'set_mapping',
      },
      curries  => {
          set       => { set_quantity => [ 'quantity' ] }
      }
  );


  # ...

  my $obj = MyClass->new;
  $obj->set_quantity(10);      # quantity => 10
  $obj->set_mapping(4, 'foo'); # 4 => 'foo'
  $obj->set_mapping(5, 'bar'); # 5 => 'bar'
  $obj->set_mapping(6, 'baz'); # 6 => 'baz'


  # prints 'bar'
  print $obj->get_mapping(5) if $obj->exists_in_mapping(5);

  # prints '4, 5, 6'
  print join ', ', $obj->ids_in_mapping;

This distribution is deprecated. The features it provides have been added to the Moose core code as Moose::Meta::Attribute::Native. This distribution should not be used by any new code.

While Moose attributes provide you with a way to name your accessors, readers, writers, clearers and predicates, this library provides commonly used attribute helper methods for more specific types of data.

As seen in the \*(L"\s-1SYNOPSIS\s0\*(R", you specify the extension via the \*(C`metaclass\*(C' parameter. Available meta classes are:

provides

This points to a hashref that uses \*(C`provider\*(C' for the keys and \*(C`method\*(C' for the values. The method will be added to the object itself and do what you want.

curries

This points to a hashref that uses \*(C`provider\*(C' for the keys and has two choices for the value:

You can supply \*(C`{method => [ @args ]}\*(C' for the values. The method will be added to the object itself (always using @args as the beginning arguments).

Another approach to curry a method provider is to supply a coderef instead of an arrayref. The code ref takes $self, $body, and any additional arguments passed to the final method.

# ...

curries => { grep => { times_with_day => sub { my ($self, $body, $datetime) = @_; $body->($self, sub { $_->ymd eq $datetime->ymd }); } } }

# ...

$obj->times_with_day(DateTime->now); # takes datetime argument, checks day

Number

Common numerical operations.

String

Common methods for string operations.

Counter

Methods for incrementing and decrementing a counter attribute.

Bool

Common methods for boolean values.

Collection::Hash

Common methods for hash references.

Collection::ImmutableHash

Common methods for inspecting hash references.

Collection::Array

Common methods for array references.

Collection::List

Common list methods for array references.

This is an early release of this module. Right now it is in great need of documentation and tests in the test suite. However, we have used this module to great success at $work where it has been tested very thoroughly and deployed into a major production site.

I plan on getting better docs and tests in the next few releases, but until then please refer to the few tests we do have and feel free email and/or message me on irc.perl.org if you have any questions.

We need tests and docs badly.

All complex software has bugs lurking in it, and this module is no exception. If you find a bug please either email me, or add the bug to cpan-RT.

Stevan Little <[email protected]>

with contributions from:

Robert (rlb3) Boone

Paul (frodwith) Driver

Shawn (Sartak) Moore

Chris (perigrin) Prather

Robert (phaylon) Sedlacek

Tom (dec) Lanyon

Yuval Kogman

Jason May

Cory (gphat) Watson

Florian (rafl) Ragwitz

Evan Carroll

Jesse (doy) Luehrs

Copyright 2007-2009 by Infinity Interactive, Inc.

<http://www.iinteractive.com>

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