2 package Mouse::Meta::Class;
6 use Mouse::Meta::Method::Constructor;
7 use Mouse::Meta::Method::Destructor;
8 use Mouse::Util qw/get_linear_isa blessed/;
14 # because Mouse doesn't introspect existing classes, we're forced to
15 # only pay attention to other Mouse classes
16 sub _metaclass_cache {
19 return $METACLASS_CACHE{$name};
25 $METACLASS_CACHE{$name} = $class->new(name => $name)
26 if !exists($METACLASS_CACHE{$name});
27 return $METACLASS_CACHE{$name};
35 $args{attributes} = {};
36 $args{superclasses} = do {
38 \@{ $args{name} . '::ISA' };
45 sub name { $_[0]->{name} }
51 Mouse::load_class($_) for @_;
52 @{ $self->{superclasses} } = @_;
55 @{ $self->{superclasses} };
63 my $pkg = $self->name;
66 *{ $pkg . '::' . $name } = $code;
69 # copied from Class::Inspector
72 my $name = $self->name;
75 # Get all the CODE symbol table entries
76 my @functions = grep !/^meta$/,
77 grep { /\A[^\W\d]\w*\z/o }
78 grep { defined &{"${name}::$_"} }
80 wantarray ? @functions : \@functions;
87 $self->{'attributes'}{$attr->name} = $attr;
90 sub compute_all_applicable_attributes {
94 for my $class ($self->linearized_isa) {
95 my $meta = $self->_metaclass_cache($class)
98 for my $name (keys %{ $meta->get_attribute_map }) {
99 next if $seen{$name}++;
100 push @attr, $meta->get_attribute($name);
107 sub get_attribute_map { $_[0]->{attributes} }
108 sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
109 sub get_attribute { $_[0]->{attributes}->{$_[1]} }
111 sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
115 my $instance = shift;
117 (blessed($instance) && $instance->isa($class->name))
118 || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)";
120 $class->clone_instance($instance, @_);
124 my ($class, $instance, %params) = @_;
127 || confess "You can only clone instances, ($instance) is not a blessed instance";
129 my $clone = bless { %$instance }, ref $instance;
131 foreach my $attr ($class->compute_all_applicable_attributes()) {
132 if ( defined( my $init_arg = $attr->init_arg ) ) {
133 if (exists $params{$init_arg}) {
134 $clone->{ $attr->name } = $params{$init_arg};
145 my $name = $self->name;
146 $self->{is_immutable}++;
148 *{"$name\::new"} = Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self );
149 *{"$name\::DESTROY"} = Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self );
152 Carp::croak "Mouse::Meta::Class->make_mutable does not supported by Mouse";
154 sub is_immutable { $_[0]->{is_immutable} }
156 sub attribute_metaclass { "Mouse::Meta::Class" }
158 sub add_before_method_modifier {
159 my ($self, $name, $code) = @_;
160 require Class::Method::Modifiers;
161 Class::Method::Modifiers::_install_modifier(
169 sub add_around_method_modifier {
170 my ($self, $name, $code) = @_;
171 require Class::Method::Modifiers;
172 Class::Method::Modifiers::_install_modifier(
180 sub add_after_method_modifier {
181 my ($self, $name, $code) = @_;
182 require Class::Method::Modifiers;
183 Class::Method::Modifiers::_install_modifier(
191 sub roles { $_[0]->{roles} }
194 my ($self, $role_name) = @_;
196 || confess "You must supply a role name to look for";
197 for my $role (@{ $self->{roles} }) {
198 return 1 if $role->name eq $role_name;
209 Mouse::Meta::Class - hook into the Mouse MOP
213 =head2 initialize ClassName -> Mouse::Meta::Class
215 Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only
216 one instance should exist for a given class.
218 =head2 new %args -> Mouse::Meta::Class
220 Creates a new Mouse::Meta::Class. Don't call this directly.
222 =head2 name -> ClassName
224 Returns the name of the owner class.
226 =head2 superclasses -> [ClassName]
228 Gets (or sets) the list of superclasses of the owner class.
230 =head2 add_attribute Mouse::Meta::Attribute
232 Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
235 =head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
237 Returns the list of all L<Mouse::Meta::Attribute> instances associated with
238 this class and its superclasses.
240 =head2 get_attribute_map -> { name => Mouse::Meta::Attribute }
242 Returns a mapping of attribute names to their corresponding
243 L<Mouse::Meta::Attribute> objects.
245 =head2 has_attribute Name -> Boool
247 Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
249 =head2 get_attribute Name -> Mouse::Meta::Attribute | undef
251 Returns the L<Mouse::Meta::Attribute> with the given name.
253 =head2 linearized_isa -> [ClassNames]
255 Returns the list of classes in method dispatch order, with duplicates removed.
257 =head2 clone_object Instance -> Instance
259 Clones the given C<Instance> which must be an instance governed by this
262 =head2 clone_instance Instance, Parameters -> Instance
264 Clones the given C<Instance> and sets any additional parameters.