+++ /dev/null
-
-package MooseX::AttributeHelpers::Base;
-use Moose;
-use Moose::Util::TypeConstraints;
-
-our $VERSION = '0.04';
-our $AUTHORITY = 'cpan:STEVAN';
-
-extends 'Moose::Meta::Attribute';
-
-# this is the method map you define ...
-has 'provides' => (
- is => 'ro',
- isa => 'HashRef',
- default => sub {{}}
-);
-
-
-# these next two are the possible methods
-# you can use in the 'provides' map.
-
-# provide a Class or Role which we can
-# collect the method providers from
-has 'method_provider' => (
- is => 'ro',
- isa => 'ClassName',
- predicate => 'has_method_provider',
-);
-
-# or you can provide a HASH ref of anon subs
-# yourself. This will also collect and store
-# the methods from a method_provider as well
-has 'method_constructors' => (
- is => 'ro',
- isa => 'HashRef',
- lazy => 1,
- default => sub {
- my $self = shift;
- return +{} unless $self->has_method_provider;
- # or grab them from the role/class
- my $method_provider = $self->method_provider->meta;
- return +{
- map {
- $_ => $method_provider->get_method($_)
- } $method_provider->get_method_list
- };
- },
-);
-
-# extend the parents stuff to make sure
-# certain bits are now required ...
-has '+$!default' => (required => 1);
-has '+type_constraint' => (required => 1);
-
-## Methods called prior to instantiation
-
-sub helper_type { () }
-
-sub process_options_for_provides {
- my ($self, $options) = @_;
-
- if (my $type = $self->helper_type) {
- (exists $options->{isa})
- || confess "You must define a type with the $type metaclass";
-
- my $isa = $options->{isa};
-
- unless (blessed($isa) && $isa->isa('Moose::Meta::TypeConstraint')) {
- $isa = Moose::Util::TypeConstraints::find_or_create_type_constraint($isa);
- }
-
- ($isa->is_a_type_of($type))
- || confess "The type constraint for a $type ($options->{isa}) must be a subtype of $type";
- }
-}
-
-before '_process_options' => sub {
- my ($self, $name, $options) = @_;
- $self->process_options_for_provides($options, $name);
-};
-
-## methods called after instantiation
-
-# this confirms that provides has
-# all valid possibilities in it
-sub check_provides_values {
- my $self = shift;
-
- my $method_constructors = $self->method_constructors;
-
- foreach my $key (keys %{$self->provides}) {
- (exists $method_constructors->{$key})
- || confess "$key is an unsupported method type";
- }
-}
-
-after 'install_accessors' => sub {
- my $attr = shift;
- my $class = $attr->associated_class;
-
- # grab the reader and writer methods
- # as well, this will be useful for
- # our method provider constructors
- my $attr_reader = $attr->get_read_method_ref;
- my $attr_writer = $attr->get_write_method_ref;
-
-
- # before we install them, lets
- # make sure they are valid
- $attr->check_provides_values;
-
- my $method_constructors = $attr->method_constructors;
-
- my $class_name = $class->name;
-
- foreach my $key (keys %{$attr->provides}) {
-
- my $method_name = $attr->provides->{$key};
-
- if ($class->has_method($method_name)) {
- confess "The method ($method_name) already exists in class (" . $class->name . ")";
- }
-
- my $method = MooseX::AttributeHelpers::Meta::Method::Provided->wrap(
- $method_constructors->{$key}->(
- $attr,
- $attr_reader,
- $attr_writer,
- ),
- package_name => $class_name,
- name => $method_name,
- );
-
- $attr->associate_method($method);
- $class->add_method($method_name => $method);
- }
-};
-
-after 'remove_accessors' => sub {
- my $attr = shift;
- my $class = $attr->associated_class;
- foreach my $key (keys %{$attr->provides}) {
- my $method_name = $attr->provides->{$key};
- my $method = $class->get_method($method_name);
- $class->remove_method($method_name)
- if blessed($method) &&
- $method->isa('MooseX::AttributeHelpers::Meta::Method::Provided');
- }
-};
-
-no Moose;
-no Moose::Util::TypeConstraints;
-
-1;
-
-__END__
-
-=pod
-
-=head1 NAME
-
-MooseX::AttributeHelpers::Base - Base class for attribute helpers
-
-=head1 DESCRIPTION
-
-Documentation to come.
-
-=head1 ATTRIBUTES
-
-=over 4
-
-=item B<provides>
-
-=item B<method_provider>
-
-=item B<method_constructors>
-
-=back
-
-=head1 EXTENDED ATTRIBUTES
-
-=over 4
-
-=item B<$!default>
-
-C<$!default> is now required.
-
-=item B<type_constraint>
-
-C<type_constraint> is now required.
-
-=back
-
-=head1 METHODS
-
-=over 4
-
-=item B<meta>
-
-=item B<helper_type>
-
-=item B<check_provides_values>
-
-=item B<has_default>
-
-=item B<has_method_provider>
-
-=item B<has_type_constraint>
-
-=item B<install_accessors>
-
-=item B<remove_accessors>
-
-=item B<process_options_for_provides>
-
-=back
-
-=head1 BUGS
-
-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.
-
-=head1 AUTHOR
-
-Stevan Little E<lt>stevan@iinteractive.comE<gt>
-
-=head1 COPYRIGHT AND LICENSE
-
-Copyright 2007-2008 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
projects / gitmo/MooseX-AttributeHelpers.git / commitdiff