[gitmo/Class-MOP.git] / lib / Class / MOP / Method.pm


package Class::MOP::Method;

use strict;
use warnings;

use Carp         'confess';
use Scalar::Util 'weaken';

our $VERSION   = '0.65';
our $AUTHORITY = 'cpan:STEVAN';

use base 'Class::MOP::Object';

# NOTE:
# if poked in the right way,
# they should act like CODE refs.
use overload '&{}' => sub { $_[0]->body }, fallback => 1;

our $UPGRADE_ERROR_TEXT = q{
---------------------------------------------------------
NOTE: this error is likely not an error, but a regression
caused by the latest upgrade to Moose/Class::MOP. Consider
upgrading any MooseX::* modules to their latest versions
before spending too much time chasing this one down.
---------------------------------------------------------
};

# construction

sub wrap {
    my ( $class, @args ) = @_;

    unshift @args, 'body' if @args % 2 == 1;

    my %params = @args;
    my $code = $params{body};

    ('CODE' eq ref($code))
        || confess "You must supply a CODE reference to bless, not (" . ($code || 'undef') . ")";

    ($params{package_name} && $params{name})
        || confess "You must supply the package_name and name parameters $UPGRADE_ERROR_TEXT";

    my $self = (ref($class) || $class)->_new(\%params);

    weaken($self->{associated_metaclass}) if $self->{associated_metaclass};

    return $self;
}

sub _new {
    my $class = shift;
    my $params = @_ == 1 ? $_[0] : {@_};

    my $self = bless {
        'body'                 => $params->{body},
        'associated_metaclass' => $params->{associated_metaclass},
        'package_name'         => $params->{package_name},
        'name'                 => $params->{name},
    } => $class;
}

## accessors

sub body { (shift)->{'body'} }

sub associated_metaclass { shift->{'associated_metaclass'} }

sub attach_to_class {
    my ( $self, $class ) = @_;
    $self->{associated_metaclass} = $class;
    weaken($self->{associated_metaclass});
}

sub detach_from_class {
    my $self = shift;
    delete $self->{associated_metaclass};
}

sub package_name {
    my $self = shift;
    $self->{'package_name'} ||= (Class::MOP::get_code_info($self->body))[0];
}

sub name {
    my $self = shift;
    $self->{'name'} ||= (Class::MOP::get_code_info($self->body))[1];
}

sub fully_qualified_name {
    my $code = shift;
    $code->package_name . '::' . $code->name;
}

# NOTE:
# the Class::MOP bootstrap
# will create this for us
# - SL
# sub clone { ... }

1;

__END__

=pod

=head1 NAME

Class::MOP::Method - Method Meta Object

=head1 DESCRIPTION

The Method Protocol is very small, since methods in Perl 5 are just
subroutines within the particular package. We provide a very basic
introspection interface.

=head1 METHODS

=head2 Introspection

=over 4

=item B<meta>

This will return a B<Class::MOP::Class> instance which is related
to this class.

=back

=head2 Construction

=over 4

=item B<wrap ($code, %params)>

This is the basic constructor, it returns a B<Class::MOP::Method>
instance which wraps the given C<$code> reference. You can also
set the C<package_name> and C<name> attributes using the C<%params>.
If these are not set, then thier accessors will attempt to figure
it out using the C<Class::MOP::get_code_info> function.

=item B<clone (%params)>

This will make a copy of the object, allowing you to override
any values by stuffing them in C<%params>.

=back

=head2 Informational

=over 4

=item B<body>

This returns the actual CODE reference of the particular instance.

=item B<name>

This returns the name of the CODE reference.

=item B<associated_metaclass>

The metaclass of the method

=item B<package_name>

This returns the package name that the CODE reference is attached to.

=item B<fully_qualified_name>

This returns the fully qualified name of the CODE reference.

=back

=head2 Metaclass

=over 4

=item B<attach_to_class>

Sets the associated metaclass

=item B<detach_from_class>

Disassociates the method from the metaclass

=back

=head1 AUTHORS

Stevan Little E<lt>stevan@iinteractive.comE<gt>

=head1 COPYRIGHT AND LICENSE

Copyright 2006-2008 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
Commit	Line	Data
8b978dd5	1
	2	package Class::MOP::Method;
	3
	4	use strict;
	5	use warnings;
	6
2eb717d5	7	use Carp 'confess';
5e607260	8	use Scalar::Util 'weaken';
2eb717d5	9
2e5c1a3f	10	our $VERSION = '0.65';
f0480c45	11	our $AUTHORITY = 'cpan:STEVAN';
de19f115	12
b1897d4d	13	use base 'Class::MOP::Object';
b1897d4d	14
ce2ae40f	15	# NOTE:
32202ce2	16	# if poked in the right way,
ce2ae40f	17	# they should act like CODE refs.
c23184fc	18	use overload '&{}' => sub { $_[0]->body }, fallback => 1;
7855ddba	19
32202ce2	20	our $UPGRADE_ERROR_TEXT = q{
	21	---------------------------------------------------------
	22	NOTE: this error is likely not an error, but a regression
	23	caused by the latest upgrade to Moose/Class::MOP. Consider
	24	upgrading any MooseX::* modules to their latest versions
	25	before spending too much time chasing this one down.
	26	---------------------------------------------------------
	27	};
	28
de19f115	29	# construction
de19f115	30
32202ce2	31	sub wrap {
5caf45ce	32	my ( $class, @args ) = @_;
	33
	34	unshift @args, 'body' if @args % 2 == 1;
	35
	36	my %params = @args;
	37	my $code = $params{body};
32202ce2	38
9b522fc4	39	('CODE' eq ref($code))
4d47b77f	40	\|\| confess "You must supply a CODE reference to bless, not (" . ($code \|\| 'undef') . ")";
32202ce2	41
b38f3848	42	($params{package_name} && $params{name})
32202ce2	43	\|\| confess "You must supply the package_name and name parameters $UPGRADE_ERROR_TEXT";
32202ce2	44
0bfc85b8	45	my $self = (ref($class) \|\| $class)->_new(\%params);
5e607260	46
	47	weaken($self->{associated_metaclass}) if $self->{associated_metaclass};
	48
	49	return $self;
de19f115	50	}
de19f115	51
71b98d4f	52	sub _new {
0bfc85b8	53	my $class = shift;
0bfc85b8	54	my $params = @_ == 1 ? $_[0] : {@_};
71b98d4f	55
71b98d4f	56	my $self = bless {
0bfc85b8	57	'body' => $params->{body},
	58	'associated_metaclass' => $params->{associated_metaclass},
	59	'package_name' => $params->{package_name},
	60	'name' => $params->{name},
71b98d4f	61	} => $class;
	62	}
	63
ce2ae40f	64	## accessors
ce2ae40f	65
8683db0e	66	sub body { (shift)->{'body'} }
7855ddba	67
5e607260	68	sub associated_metaclass { shift->{'associated_metaclass'} }
b1897d4d	69
5e607260	70	sub attach_to_class {
	71	my ( $self, $class ) = @_;
	72	$self->{associated_metaclass} = $class;
	73	weaken($self->{associated_metaclass});
	74	}
	75
	76	sub detach_from_class {
	77	my $self = shift;
	78	delete $self->{associated_metaclass};
	79	}
de19f115	80
32202ce2	81	sub package_name {
4c105333	82	my $self = shift;
8683db0e	83	$self->{'package_name'} \|\|= (Class::MOP::get_code_info($self->body))[0];
de19f115	84	}
de19f115	85
32202ce2	86	sub name {
4c105333	87	my $self = shift;
8683db0e	88	$self->{'name'} \|\|= (Class::MOP::get_code_info($self->body))[1];
2eb717d5	89	}
de19f115	90
96ceced8	91	sub fully_qualified_name {
4c105333	92	my $code = shift;
4c105333	93	$code->package_name . '::' . $code->name;
96ceced8	94	}
96ceced8	95
4c105333	96	# NOTE:
	97	# the Class::MOP bootstrap
	98	# will create this for us
	99	# - SL
	100	# sub clone { ... }
	101
8b978dd5	102	1;
	103
	104	__END__
	105
	106	=pod
	107
32202ce2	108	=head1 NAME
8b978dd5	109
	110	Class::MOP::Method - Method Meta Object
	111
8b978dd5	112	=head1 DESCRIPTION
8b978dd5	113
32202ce2	114	The Method Protocol is very small, since methods in Perl 5 are just
32202ce2	115	subroutines within the particular package. We provide a very basic
86482605	116	introspection interface.
fe122940	117
2eb717d5	118	=head1 METHODS
2eb717d5	119
de19f115	120	=head2 Introspection
2eb717d5	121
de19f115	122	=over 4
fe122940	123
2eb717d5	124	=item B<meta>
2eb717d5	125
32202ce2	126	This will return a B<Class::MOP::Class> instance which is related
fe122940	127	to this class.
fe122940	128
2eb717d5	129	=back
2eb717d5	130
de19f115	131	=head2 Construction
	132
	133	=over 4
	134
4c105333	135	=item B<wrap ($code, %params)>
127d39a7	136
32202ce2	137	This is the basic constructor, it returns a B<Class::MOP::Method>
32202ce2	138	instance which wraps the given C<$code> reference. You can also
4c105333	139	set the C<package_name> and C<name> attributes using the C<%params>.
32202ce2	140	If these are not set, then thier accessors will attempt to figure
4c105333	141	it out using the C<Class::MOP::get_code_info> function.
	142
	143	=item B<clone (%params)>
	144
32202ce2	145	This will make a copy of the object, allowing you to override
4c105333	146	any values by stuffing them in C<%params>.
de19f115	147
de19f115	148	=back
	149
	150	=head2 Informational
	151
	152	=over 4
	153
7855ddba	154	=item B<body>
7855ddba	155
127d39a7	156	This returns the actual CODE reference of the particular instance.
127d39a7	157
de19f115	158	=item B<name>
de19f115	159
127d39a7	160	This returns the name of the CODE reference.
127d39a7	161
5e607260	162	=item B<associated_metaclass>
	163
	164	The metaclass of the method
	165
de19f115	166	=item B<package_name>
de19f115	167
127d39a7	168	This returns the package name that the CODE reference is attached to.
127d39a7	169
96ceced8	170	=item B<fully_qualified_name>
96ceced8	171
127d39a7	172	This returns the fully qualified name of the CODE reference.
127d39a7	173
96ceced8	174	=back
96ceced8	175
5e607260	176	=head2 Metaclass
	177
	178	=over 4
	179
	180	=item B<attach_to_class>
	181
	182	Sets the associated metaclass
	183
	184	=item B<detach_from_class>
	185
	186	Disassociates the method from the metaclass
	187
	188	=back
	189
1a09d9cc	190	=head1 AUTHORS
8b978dd5	191
a2e85e6c	192	Stevan Little E<lt>stevan@iinteractive.comE<gt>
8b978dd5	193
	194	=head1 COPYRIGHT AND LICENSE
	195
69e3ab0a	196	Copyright 2006-2008 by Infinity Interactive, Inc.
8b978dd5	197
	198	L<http://www.iinteractive.com>
	199
	200	This library is free software; you can redistribute it and/or modify
32202ce2	201	it under the same terms as Perl itself.
8b978dd5	202
16e960bd	203	=cut
16e960bd	204