1 package Mouse::Meta::Module;
6 use Scalar::Util qw/blessed weaken/;
8 use Mouse::Util qw/get_code_info not_supported load_class/;
13 # because Mouse doesn't introspect existing classes, we're forced to
14 # only pay attention to other Mouse classes
15 sub _metaclass_cache {
16 my($class, $name) = @_;
17 return $METACLASS_CACHE{$name};
21 my($class, $package_name, @args) = @_;
23 ($package_name && !ref($package_name))
\r
24 || $class->throw_error("You must pass a package name and it cannot be blessed");
\r
26 return $METACLASS_CACHE{$package_name}
27 ||= $class->_new(package => $package_name, @args);
31 my($class_or_instance) = @_;
32 return undef unless defined $class_or_instance;
33 return $METACLASS_CACHE{ blessed($class_or_instance) || $class_or_instance };
36 # Means of accessing all the metaclasses that have
37 # been initialized thus far
38 sub get_all_metaclasses { %METACLASS_CACHE }
39 sub get_all_metaclass_instances { values %METACLASS_CACHE }
40 sub get_all_metaclass_names { keys %METACLASS_CACHE }
41 sub get_metaclass_by_name { $METACLASS_CACHE{$_[0]} }
42 sub store_metaclass_by_name { $METACLASS_CACHE{$_[0]} = $_[1] }
43 sub weaken_metaclass { weaken($METACLASS_CACHE{$_[0]}) }
44 sub does_metaclass_exist { defined $METACLASS_CACHE{$_[0]} }
45 sub remove_metaclass_by_name { delete $METACLASS_CACHE{$_[0]} }
49 sub meta{ Mouse::Meta::Class->initialize(ref $_[0] || $_[0]) }
51 sub _new{ Carp::croak("Mouse::Meta::Module is an abstract class") }
53 sub name { $_[0]->{package} }
54 sub _method_map{ $_[0]->{methods} }
56 sub version { no strict 'refs'; ${shift->name.'::VERSION'} }
57 sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} }
62 ($self->version || ()),
63 ($self->authority || ()),
67 # add_attribute is an abstract method
69 sub get_attribute_map { $_[0]->{attributes} }
70 sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
71 sub get_attribute { $_[0]->{attributes}->{$_[1]} }
72 sub get_attribute_list{ keys %{$_[0]->{attributes}} }
73 sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} }
76 my $name = $_[0]->{package};
78 return \%{ $name . '::' };
82 my($self, $name, $code) = @_;
85 $self->throw_error("You must pass a defined name");
87 if(ref($code) ne 'CODE'){
88 not_supported 'add_method for a method object';
91 $self->_method_map->{$name}++; # Moose stores meta object here.
93 my $pkg = $self->name;
95 no warnings 'redefine';
96 *{ $pkg . '::' . $name } = $code;
99 sub _code_is_mine { # taken from Class::MOP::Class
\r
100 my ( $self, $code ) = @_;
\r
102 my ( $code_package, $code_name ) = get_code_info($code);
\r
104 return $code_package && $code_package eq $self->name
\r
105 || ( $code_package eq 'constant' && $code_name eq '__ANON__' );
\r
109 my($self, $method_name) = @_;
111 return 1 if $self->_method_map->{$method_name};
112 my $code = $self->name->can($method_name);
114 return $code && $self->_code_is_mine($code);
118 my($self, $method_name) = @_;
120 if($self->has_method($method_name)){
121 my $method_metaclass = $self->method_metaclass;
122 load_class($method_metaclass);
124 my $package = $self->name;
125 return $method_metaclass->new(
126 body => $package->can($method_name),
127 name => $method_name,
135 sub get_method_list {
\r
138 return grep { $self->has_method($_) } keys %{ $self->namespace };
\r
143 my $ANON_PREFIX = 'Mouse::Meta::Module::__ANON__::';
148 my ($class, $package_name, %options) = @_;
150 $class->throw_error('You must pass a package name') if @_ == 1;
153 if(exists $options{superclasses}){
154 if($class->isa('Mouse::Meta::Class')){
155 (ref $options{superclasses} eq 'ARRAY')
156 || $class->throw_error("You must pass an ARRAY ref of superclasses");
159 delete $options{superclasses};
164 if(exists $options{attributes}){
165 $attributes = delete $options{attributes};
166 (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH')
167 || $class->throw_error("You must pass an ARRAY ref of attributes")
170 (ref $options{methods} eq 'HASH')
171 || $class->throw_error("You must pass a HASH ref of methods")
172 if exists $options{methods};
174 (ref $options{roles} eq 'ARRAY')
175 || $class->throw_error("You must pass an ARRAY ref of roles")
176 if exists $options{roles};
183 if(!defined $package_name){ # anonymous
184 $mortal = !$options{cache};
186 # anonymous but immortal
188 # something like Super::Class|Super::Class::2=Role|Role::1
\r
189 $cache_key = join '=' => (
\r
190 join('|', @{$options{superclasses} || []}),
\r
191 join('|', sort @{$options{roles} || []}),
\r
193 return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key};
195 $package_name = $ANON_PREFIX . ++$ANON_SERIAL;
197 push @extra_options, (anon_serial_id => $ANON_SERIAL);
200 # instantiate a module
203 ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version};
204 ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority};
207 my %initialize_options = %options;
208 delete @initialize_options{qw(
215 my $meta = $class->initialize( $package_name, %initialize_options, @extra_options);
217 Mouse::Meta::Module::weaken_metaclass($package_name)
221 $meta->add_method('meta' => sub {
222 $class->initialize(ref($_[0]) || $_[0]);
225 $meta->superclasses(@{$options{superclasses}})
226 if exists $options{superclasses};
229 # process attributes first, so that they can
230 # install accessors, but locally defined methods
231 # can then overwrite them. It is maybe a little odd, but
232 # I think this should be the order of things.
233 if (defined $attributes) {
234 if(ref($attributes) eq 'ARRAY'){
235 foreach my $attr (@{$attributes}) {
236 $meta->add_attribute($attr->{name} => $attr);
240 while(my($name, $attr) = each %{$attributes}){
241 $meta->add_attribute($name => $attr);
245 if (exists $options{methods}) {
246 foreach my $method_name (keys %{$options{methods}}) {
247 $meta->add_method($method_name, $options{methods}->{$method_name});
250 if (exists $options{roles}){
251 Mouse::Util::apply_all_roles($package_name, @{$options{roles}});
254 if(!$mortal && exists $meta->{anon_serial_id}){
255 $IMMORTALS{$cache_key} = $meta;
264 my $serial_id = $self->{anon_serial_id};
266 return if !$serial_id;
268 my $stash = $self->namespace;
270 @{$self->{superclasses}} = () if exists $self->{superclasses};
272 Mouse::Meta::Module::remove_metaclass_by_name($self->name);
275 delete ${$ANON_PREFIX}{ $serial_id . '::' };
282 my($class, $message, %args) = @_;
284 local $Carp::CarpLevel = $Carp::CarpLevel + 1 + ($args{depth} || 0);
285 local $Carp::MaxArgNums = 20; # default is 8, usually we use named args which gets messier though
\r
287 if(exists $args{longmess} && !$args{longmess}){ # intentionaly longmess => 0
288 Carp::croak($message);
291 Carp::confess($message);
301 Mouse::Meta::Module - Common base class for Mouse::Meta::Class and Mouse::Meta::Role