#!/usr/bin/env perl
package Mouse::Meta::Class;
use strict;
use warnings;
use Scalar::Util 'blessed';
use MRO::Compat;
do {
my %METACLASS_CACHE;
# because Mouse doesn't introspect existing classes, we're forced to
# only pay attention to other Mouse classes
sub _metaclass_cache {
my $class = shift;
my $name = shift;
return $METACLASS_CACHE{$name};
}
sub initialize {
my $class = shift;
my $name = shift;
$METACLASS_CACHE{$name} = $class->new(name => $name)
if !exists($METACLASS_CACHE{$name});
return $METACLASS_CACHE{$name};
}
};
sub new {
my $class = shift;
my %args = @_;
$args{attributes} = {};
$args{superclasses} = do {
no strict 'refs';
\@{ $args{name} . '::ISA' };
};
bless \%args, $class;
}
sub name { $_[0]->{name} }
sub superclasses {
my $self = shift;
if (@_) {
Mouse::load_class($_) for @_;
@{ $self->{superclasses} } = @_;
}
@{ $self->{superclasses} };
}
sub add_attribute {
my $self = shift;
my $attr = shift;
$self->{'attributes'}{$attr->name} = $attr;
}
sub compute_all_applicable_attributes {
my $self = shift;
my (@attr, %seen);
for my $class ($self->linearized_isa) {
my $meta = $self->_metaclass_cache($class)
or next;
for my $name (keys %{ $meta->get_attribute_map }) {
next if $seen{$name}++;
push @attr, $meta->get_attribute($name);
}
}
return @attr;
}
sub get_attribute_map { $_[0]->{attributes} }
sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
sub get_attribute { $_[0]->{attributes}->{$_[1]} }
sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } }
1;
__END__
=head1 NAME
Mouse::Meta::Class - hook into the Mouse MOP
=head1 METHODS
=head2 initialize ClassName -> Mouse::Meta::Class
Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only
one instance should exist for a given class.
=head2 new %args -> Mouse::Meta::Class
Creates a new Mouse::Meta::Class. Don't call this directly.
=head2 name -> ClassName
Returns the name of the owner class.
=head2 superclasses -> [ClassName]
Gets (or sets) the list of superclasses of the owner class.
=head2 add_attribute Mouse::Meta::Attribute
Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
class.
=head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
Returns the list of all L<Mouse::Meta::Attribute> instances associated with
this class and its superclasses.
=head2 get_attribute_map -> { name => Mouse::Meta::Attribute }
Returns a mapping of attribute names to their corresponding
L<Mouse::Meta::Attribute> objects.
=head2 has_attribute Name -> Boool
Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
=head2 get_attribute Name -> Mouse::Meta::Attribute | undef
Returns the L<Mouse::Meta::Attribute> with the given name.
=head2 linearized_isa -> [ClassNames]
Returns the list of classes in method dispatch order, with duplicates removed.
=cut