1 package Class::MOP::Mixin::HasMethods;
6 use Class::MOP::Method::Meta;
9 $VERSION = eval $VERSION;
10 our $AUTHORITY = 'cpan:STEVAN';
12 use Scalar::Util 'blessed';
14 use Sub::Name 'subname';
16 use base 'Class::MOP::Mixin';
18 sub _meta_method_class { 'Class::MOP::Method::Meta' }
20 sub _add_meta_method {
23 my $existing_method = $self->can('find_method_by_name')
24 ? $self->find_method_by_name($name)
25 : $self->get_method($name);
26 return if $existing_method
27 && $existing_method->isa($self->_meta_method_class);
29 $name => $self->_meta_method_class->wrap(
31 package_name => $self->name,
32 associated_metaclass => $self,
37 sub wrap_method_body {
38 my ( $self, %args ) = @_;
40 ( 'CODE' eq ref $args{body} )
41 || confess "Your code block must be a CODE reference";
43 $self->method_metaclass->wrap(
44 package_name => $self->name,
50 my ( $self, $method_name, $method ) = @_;
51 ( defined $method_name && length $method_name )
52 || confess "You must define a method name";
54 my $package_name = $self->name;
57 if ( blessed($method) ) {
58 $body = $method->body;
59 if ( $method->package_name ne $package_name ) {
60 $method = $method->clone(
61 package_name => $package_name,
66 $method->attach_to_class($self);
69 # If a raw code reference is supplied, its method object is not created.
70 # The method object won't be created until required.
74 $self->_method_map->{$method_name} = $method;
76 my ($current_package, $current_name) = Class::MOP::get_code_info($body);
78 subname($package_name . '::' . $method_name, $body)
79 unless defined $current_name && $current_name !~ /^__ANON__/;
81 $self->add_package_symbol("&$method_name", $body);
83 # we added the method to the method map too, so it's still valid
84 $self->update_package_cache_flag;
88 my ( $self, $code ) = @_;
90 my ( $code_package, $code_name ) = Class::MOP::get_code_info($code);
92 return ( $code_package && $code_package eq $self->name )
93 || ( $code_package eq 'constant' && $code_name eq '__ANON__' );
97 my ( $self, $method_name ) = @_;
99 ( defined $method_name && length $method_name )
100 || confess "You must define a method name";
102 my $method = $self->_get_maybe_raw_method($method_name)
105 return defined($self->_method_map->{$method_name} = $method);
109 my ( $self, $method_name ) = @_;
111 ( defined $method_name && length $method_name )
112 || confess "You must define a method name";
114 my $method = $self->_get_maybe_raw_method($method_name)
117 return $method if blessed $method;
119 return $self->_method_map->{$method_name} = $self->wrap_method_body(
121 name => $method_name,
122 associated_metaclass => $self,
126 sub _get_maybe_raw_method {
127 my ( $self, $method_name ) = @_;
129 my $map_entry = $self->_method_map->{$method_name};
130 return $map_entry if defined $map_entry;
132 my $code = $self->get_package_symbol("&$method_name");
134 return unless $code && $self->_code_is_mine($code);
140 my ( $self, $method_name ) = @_;
142 ( defined $method_name && length $method_name )
143 || confess "You must define a method name";
145 my $removed_method = delete $self->_method_map->{$method_name};
147 $self->remove_package_symbol("&$method_name");
149 $removed_method->detach_from_class
150 if blessed($removed_method);
152 # still valid, since we just removed the method from the map
153 $self->update_package_cache_flag;
155 return $removed_method;
158 sub get_method_list {
161 return keys %{ $self->_full_method_map };
164 sub _get_local_methods {
167 return values %{ $self->_full_method_map };
170 sub _restore_metamethods_from {
174 for my $method ($old_meta->_get_local_methods) {
175 $method->_make_compatible_with($self->method_metaclass);
176 $self->add_method($method->name => $method);
180 sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef }
181 sub update_package_cache_flag {
184 # we can manually update the cache number
185 # since we are actually adding the method
186 # to our cache as well. This avoids us
187 # having to regenerate the method_map.
189 $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
192 sub _full_method_map {
195 my $pkg_gen = Class::MOP::check_package_cache_flag($self->name);
197 if (($self->{_package_cache_flag_full} || -1) != $pkg_gen) {
198 # forcibly reify all method map entries
199 $self->get_method($_)
200 for $self->list_all_package_symbols('CODE');
201 $self->{_package_cache_flag_full} = $pkg_gen;
204 return $self->_method_map;
215 Class::MOP::Mixin::HasMethods - Methods for metaclasses which have methods
219 This class implements methods for metaclasses which have methods
220 (L<Class::MOP::Package> and L<Moose::Meta::Role>). See L<Class::MOP::Package>
225 Dave Rolsky E<lt>autarch@urth.orgE<gt>
227 =head1 COPYRIGHT AND LICENSE
229 Copyright 2006-2010 by Infinity Interactive, Inc.
231 L<http://www.iinteractive.com>
233 This library is free software; you can redistribute it and/or modify
234 it under the same terms as Perl itself.