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package Class::MOP::Mixin::HasMethods;
use strict;
use warnings;
our $VERSION = '1.04';
$VERSION = eval $VERSION;
our $AUTHORITY = 'cpan:STEVAN';
use Scalar::Util 'blessed';
use Carp 'confess';
use Sub::Name 'subname';
use base 'Class::MOP::Mixin';
sub method_metaclass { $_[0]->{'method_metaclass'} }
sub wrapped_method_metaclass { $_[0]->{'wrapped_method_metaclass'} }
# This doesn't always get initialized in a constructor because there is a
# weird object construction path for subclasses of Class::MOP::Class. At one
# point, this always got initialized by calling into the XS code first, but
# that is no longer guaranteed to happen.
sub _method_map { $_[0]->{'methods'} ||= {} }
sub wrap_method_body {
my ( $self, %args ) = @_;
( 'CODE' eq ref $args{body} )
|| confess "Your code block must be a CODE reference";
$self->method_metaclass->wrap(
package_name => $self->name,
%args,
);
}
sub add_method {
my ( $self, $method_name, $method ) = @_;
( defined $method_name && length $method_name )
|| confess "You must define a method name";
my $body;
if ( blessed($method) ) {
$body = $method->body;
if ( $method->package_name ne $self->name ) {
$method = $method->clone(
package_name => $self->name,
name => $method_name,
) if $method->can('clone');
}
$method->attach_to_class($self);
}
else {
# If a raw code reference is supplied, its method object is not created.
# The method object won't be created until required.
$body = $method;
}
$self->_method_map->{$method_name} = $method;
my ( $current_package, $current_name ) = Class::MOP::get_code_info($body);
if ( !defined $current_name || $current_name =~ /^__ANON__/ ) {
my $full_method_name = ( $self->name . '::' . $method_name );
subname( $full_method_name => $body );
}
$self->add_package_symbol(
{ sigil => '&', type => 'CODE', name => $method_name },
$body,
);
}
sub _code_is_mine {
my ( $self, $code ) = @_;
my ( $code_package, $code_name ) = Class::MOP::get_code_info($code);
return $code_package && $code_package eq $self->name
|| ( $code_package eq 'constant' && $code_name eq '__ANON__' );
}
sub has_method {
my ( $self, $method_name ) = @_;
( defined $method_name && length $method_name )
|| confess "You must define a method name";
return defined( $self->get_method($method_name) );
}
sub get_method {
my ( $self, $method_name ) = @_;
( defined $method_name && length $method_name )
|| confess "You must define a method name";
my $method_map = $self->_method_map;
my $map_entry = $method_map->{$method_name};
my $code = $self->get_package_symbol(
{
name => $method_name,
sigil => '&',
type => 'CODE',
}
);
# This seems to happen in some weird cases where methods modifiers are
# added via roles or some other such bizareness. Honestly, I don't totally
# understand this, but returning the entry works, and keeps various MX
# modules from blowing up. - DR
return $map_entry if blessed $map_entry && !$code;
return $map_entry if blessed $map_entry && $map_entry->body == $code;
unless ($map_entry) {
return unless $code && $self->_code_is_mine($code);
}
$code ||= $map_entry;
return $method_map->{$method_name} = $self->wrap_method_body(
body => $code,
name => $method_name,
associated_metaclass => $self,
);
}
sub remove_method {
my ( $self, $method_name ) = @_;
( defined $method_name && length $method_name )
|| confess "You must define a method name";
my $removed_method = delete $self->_full_method_map->{$method_name};
$self->remove_package_symbol(
{ sigil => '&', type => 'CODE', name => $method_name } );
$removed_method->detach_from_class
if $removed_method && blessed $removed_method;
# still valid, since we just removed the method from the map
$self->update_package_cache_flag;
return $removed_method;
}
sub get_method_list {
my $self = shift;
return grep { $self->has_method($_) } keys %{ $self->namespace };
}
1;
__END__
=pod
=head1 NAME
Class::MOP::Mixin::HasMethods - Methods for metaclasses which have methods
=head1 DESCRIPTION
This class implements methods for metaclasses which have methods
(L<Class::MOP::Package> and L<Moose::Meta::Role>). See L<Class::MOP::Package>
for API details.
=head1 AUTHORS
Dave Rolsky E<lt>autarch@urth.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2006-2010 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
|
