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 method_metaclass { $_[0]->{'method_metaclass'} }
19 sub wrapped_method_metaclass { $_[0]->{'wrapped_method_metaclass'} }
20 sub _meta_method_class { 'Class::MOP::Method::Meta' }
22 sub _add_meta_method {
25 my $existing_method = $self->can('find_method_by_name')
26 ? $self->find_method_by_name($name)
27 : $self->get_method($name);
28 return if $existing_method
29 && $existing_method->isa($self->_meta_method_class);
31 $name => $self->_meta_method_class->wrap(
33 package_name => $self->name,
34 associated_metaclass => $self,
39 sub wrap_method_body {
40 my ( $self, %args ) = @_;
42 ( 'CODE' eq ref $args{body} )
43 || confess "Your code block must be a CODE reference";
45 $self->method_metaclass->wrap(
46 package_name => $self->name,
52 my ( $self, $method_name, $method ) = @_;
53 ( defined $method_name && length $method_name )
54 || confess "You must define a method name";
56 my $package_name = $self->name;
59 if ( blessed($method) ) {
60 $body = $method->body;
61 if ( $method->package_name ne $package_name ) {
62 $method = $method->clone(
63 package_name => $package_name,
65 ) if $method->can('clone');
68 $method->attach_to_class($self);
71 # If a raw code reference is supplied, its method object is not created.
72 # The method object won't be created until required.
76 $self->_method_map->{$method_name} = $method;
78 my ( $current_package, $current_name ) = Class::MOP::get_code_info($body);
80 if ( !defined $current_name || $current_name =~ /^__ANON__/ ) {
81 my $full_method_name = ( $package_name . '::' . $method_name );
82 subname( $full_method_name => $body );
85 $self->add_package_symbol(
86 { sigil => '&', type => 'CODE', name => $method_name },
92 my ( $self, $code ) = @_;
94 my ( $code_package, $code_name ) = Class::MOP::get_code_info($code);
96 return $code_package && $code_package eq $self->name
97 || ( $code_package eq 'constant' && $code_name eq '__ANON__' );
101 my ( $self, $method_name ) = @_;
103 ( defined $method_name && length $method_name )
104 || confess "You must define a method name";
106 return defined( $self->_get_maybe_raw_method($method_name) );
110 my ( $self, $method_name ) = @_;
112 ( defined $method_name && length $method_name )
113 || confess "You must define a method name";
115 my $method = $self->_get_maybe_raw_method($method_name)
118 return $method if blessed $method;
120 return $self->_method_map->{$method_name} = $self->wrap_method_body(
122 name => $method_name,
123 associated_metaclass => $self,
127 sub _get_maybe_raw_method {
128 my ( $self, $method_name ) = @_;
130 my $method_map = $self->_method_map;
131 my $map_entry = $method_map->{$method_name};
132 my $code = $self->get_package_symbol(
134 name => $method_name,
140 # The !$code case seems to happen in some weird cases where methods
141 # modifiers are added via roles or some other such bizareness. Honestly, I
142 # don't totally understand this, but returning the entry works, and keeps
143 # various MX modules from blowing up. - DR
145 if blessed $map_entry && ( !$code || $map_entry->body == $code );
147 unless ($map_entry) {
148 return unless $code && $self->_code_is_mine($code);
155 my ( $self, $method_name ) = @_;
156 ( defined $method_name && length $method_name )
157 || confess "You must define a method name";
159 my $removed_method = delete $self->_method_map->{$method_name};
161 $self->remove_package_symbol(
162 { sigil => '&', type => 'CODE', name => $method_name } );
164 $removed_method->detach_from_class
165 if $removed_method && blessed $removed_method;
167 # still valid, since we just removed the method from the map
168 $self->update_package_cache_flag;
170 return $removed_method;
173 sub get_method_list {
176 my $namespace = $self->namespace;
178 # Constants may show up as some sort of non-GLOB reference in the
179 # namespace hash ref, depending on the Perl version.
181 defined $namespace->{$_}
182 && ( ref( \$namespace->{$_} ) ne 'GLOB'
183 || *{ $namespace->{$_} }{CODE} )
184 && $self->has_method($_)
189 # This should probably be what get_method_list actually does, instead of just
190 # returning names. This was created as a much faster alternative to
191 # $meta->get_method($_) for $meta->get_method_list
192 sub _get_local_methods {
195 my $namespace = $self->namespace;
197 return map { $self->get_method($_) }
199 defined $namespace->{$_}
200 && ( ref $namespace->{$_}
201 || *{ $namespace->{$_} }{CODE} )
206 sub _restore_metamethods_from {
210 for my $method ($old_meta->_get_local_methods) {
211 $method->_make_compatible_with($self->method_metaclass);
212 $self->add_method($method->name => $method);
216 sub reset_package_cache_flag { (shift)->{'_package_cache_flag'} = undef }
217 sub update_package_cache_flag {
220 # we can manually update the cache number
221 # since we are actually adding the method
222 # to our cache as well. This avoids us
223 # having to regenerate the method_map.
225 $self->{'_package_cache_flag'} = Class::MOP::check_package_cache_flag($self->name);
236 Class::MOP::Mixin::HasMethods - Methods for metaclasses which have methods
240 This class implements methods for metaclasses which have methods
241 (L<Class::MOP::Package> and L<Moose::Meta::Role>). See L<Class::MOP::Package>
246 Dave Rolsky E<lt>autarch@urth.orgE<gt>
248 =head1 COPYRIGHT AND LICENSE
250 Copyright 2006-2010 by Infinity Interactive, Inc.
252 L<http://www.iinteractive.com>
254 This library is free software; you can redistribute it and/or modify
255 it under the same terms as Perl itself.