Moose-2.1405HEADMoose-2.1405master

1 files changed, 171 insertions, 0 deletions

diff --git a/lib/Class/MOP/Mixin/HasAttributes.pm b/lib/Class/MOP/Mixin/HasAttributes.pm
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+++ b/lib/Class/MOP/Mixin/HasAttributes.pm
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+package Class::MOP::Mixin::HasAttributes;
+our $VERSION = '2.1405';
+
+use strict;
+use warnings;
+
+use Scalar::Util 'blessed';
+
+use parent 'Class::MOP::Mixin';
+
+sub add_attribute {
+    my $self = shift;
+
+    my $attribute
+        = blessed( $_[0] ) ? $_[0] : $self->attribute_metaclass->new(@_);
+
+    ( $attribute->isa('Class::MOP::Mixin::AttributeCore') )
+        || $self->_throw_exception( AttributeMustBeAnClassMOPMixinAttributeCoreOrSubclass => attribute  => $attribute,
+                                                                                     class_name => $self->name,
+                          );
+
+    $self->_attach_attribute($attribute);
+
+    my $attr_name = $attribute->name;
+
+    $self->remove_attribute($attr_name)
+        if $self->has_attribute($attr_name);
+
+    my $order = ( scalar keys %{ $self->_attribute_map } );
+    $attribute->_set_insertion_order($order);
+
+    $self->_attribute_map->{$attr_name} = $attribute;
+
+    # This method is called to allow for installing accessors. Ideally, we'd
+    # use method overriding, but then the subclass would be responsible for
+    # making the attribute, which would end up with lots of code
+    # duplication. Even more ideally, we'd use augment/inner, but this is
+    # Class::MOP!
+    $self->_post_add_attribute($attribute)
+        if $self->can('_post_add_attribute');
+
+    return $attribute;
+}
+
+sub has_attribute {
+    my ( $self, $attribute_name ) = @_;
+
+    ( defined $attribute_name )
+        || $self->_throw_exception( MustDefineAnAttributeName => class_name => $self->name );
+
+    exists $self->_attribute_map->{$attribute_name};
+}
+
+sub get_attribute {
+    my ( $self, $attribute_name ) = @_;
+
+    ( defined $attribute_name )
+        || $self->_throw_exception( MustDefineAnAttributeName => class_name => $self->name );
+
+    return $self->_attribute_map->{$attribute_name};
+}
+
+sub remove_attribute {
+    my ( $self, $attribute_name ) = @_;
+
+    ( defined $attribute_name )
+        || $self->_throw_exception( MustDefineAnAttributeName => class_name => $self->name );
+
+    my $removed_attribute = $self->_attribute_map->{$attribute_name};
+    return unless defined $removed_attribute;
+
+    delete $self->_attribute_map->{$attribute_name};
+
+    return $removed_attribute;
+}
+
+sub get_attribute_list {
+    my $self = shift;
+    keys %{ $self->_attribute_map };
+}
+
+sub _restore_metaattributes_from {
+    my $self = shift;
+    my ($old_meta) = @_;
+
+    for my $attr (sort { $a->insertion_order <=> $b->insertion_order }
+                       map { $old_meta->get_attribute($_) }
+                           $old_meta->get_attribute_list) {
+        $attr->_make_compatible_with($self->attribute_metaclass);
+        $self->add_attribute($attr);
+    }
+}
+
+1;
+
+# ABSTRACT: Methods for metaclasses which have attributes
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+Class::MOP::Mixin::HasAttributes - Methods for metaclasses which have attributes
+
+=head1 VERSION
+
+version 2.1405
+
+=head1 DESCRIPTION
+
+This class implements methods for metaclasses which have attributes
+(L<Class::MOP::Class> and L<Moose::Meta::Role>). See L<Class::MOP::Class> for
+API details.
+
+=head1 AUTHORS
+
+=over 4
+
+=item *
+
+Stevan Little <stevan.little@iinteractive.com>
+
+=item *
+
+Dave Rolsky <autarch@urth.org>
+
+=item *
+
+Jesse Luehrs <doy@tozt.net>
+
+=item *
+
+Shawn M Moore <code@sartak.org>
+
+=item *
+
+יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
+
+=item *
+
+Karen Etheridge <ether@cpan.org>
+
+=item *
+
+Florian Ragwitz <rafl@debian.org>
+
+=item *
+
+Hans Dieter Pearcey <hdp@weftsoar.net>
+
+=item *
+
+Chris Prather <chris@prather.org>
+
+=item *
+
+Matt S Trout <mst@shadowcat.co.uk>
+
+=back
+
+=head1 COPYRIGHT AND LICENSE
+
+This software is copyright (c) 2006 by Infinity Interactive, Inc..
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut