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' };
44 sub name { $_[0]->{name} }
50 Mouse::load_class($_) for @_;
51 @{ $self->{superclasses} } = @_;
54 @{ $self->{superclasses} };
62 my $pkg = $self->name;
65 *{ $pkg . '::' . $name } = $code;
68 # copied from Class::Inspector
71 my $name = $self->name;
74 # Get all the CODE symbol table entries
75 my @functions = grep !/^meta$/,
76 grep { /\A[^\W\d]\w*\z/o }
77 grep { defined &{"${name}::$_"} }
79 wantarray ? @functions : \@functions;
86 $self->{'attributes'}{$attr->name} = $attr;
89 sub compute_all_applicable_attributes {
93 for my $class ($self->linearized_isa) {
94 my $meta = $self->_metaclass_cache($class)
97 for my $name (keys %{ $meta->get_attribute_map }) {
98 next if $seen{$name}++;
99 push @attr, $meta->get_attribute($name);
106 sub get_attribute_map { $_[0]->{attributes} }
107 sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
108 sub get_attribute { $_[0]->{attributes}->{$_[1]} }
110 sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
114 my $instance = shift;
116 (blessed($instance) && $instance->isa($class->name))
117 || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)";
119 $class->clone_instance($instance, @_);
123 my ($class, $instance, %params) = @_;
126 || confess "You can only clone instances, ($instance) is not a blessed instance";
128 my $clone = bless { %$instance }, ref $instance;
130 foreach my $attr ($class->compute_all_applicable_attributes()) {
131 if ( defined( my $init_arg = $attr->init_arg ) ) {
132 if (exists $params{$init_arg}) {
133 $clone->{ $attr->name } = $params{$init_arg};
144 my $name = $self->name;
145 $self->{is_immutable}++;
147 *{"$name\::new"} = Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self );
148 *{"$name\::DESTROY"} = Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self );
151 Carp::croak "Mouse::Meta::Class->make_mutable does not supported by Mouse";
153 sub is_immutable { $_[0]->{is_immutable} }
155 sub attribute_metaclass { "Mouse::Meta::Class" }
157 sub add_before_method_modifier {
158 my ($self, $name, $code) = @_;
159 require Class::Method::Modifiers;
160 Class::Method::Modifiers::_install_modifier(
168 sub add_around_method_modifier {
169 my ($self, $name, $code) = @_;
170 require Class::Method::Modifiers;
171 Class::Method::Modifiers::_install_modifier(
179 sub add_after_method_modifier {
180 my ($self, $name, $code) = @_;
181 require Class::Method::Modifiers;
182 Class::Method::Modifiers::_install_modifier(
196 Mouse::Meta::Class - hook into the Mouse MOP
200 =head2 initialize ClassName -> Mouse::Meta::Class
202 Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only
203 one instance should exist for a given class.
205 =head2 new %args -> Mouse::Meta::Class
207 Creates a new Mouse::Meta::Class. Don't call this directly.
209 =head2 name -> ClassName
211 Returns the name of the owner class.
213 =head2 superclasses -> [ClassName]
215 Gets (or sets) the list of superclasses of the owner class.
217 =head2 add_attribute Mouse::Meta::Attribute
219 Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
222 =head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
224 Returns the list of all L<Mouse::Meta::Attribute> instances associated with
225 this class and its superclasses.
227 =head2 get_attribute_map -> { name => Mouse::Meta::Attribute }
229 Returns a mapping of attribute names to their corresponding
230 L<Mouse::Meta::Attribute> objects.
232 =head2 has_attribute Name -> Boool
234 Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
236 =head2 get_attribute Name -> Mouse::Meta::Attribute | undef
238 Returns the L<Mouse::Meta::Attribute> with the given name.
240 =head2 linearized_isa -> [ClassNames]
242 Returns the list of classes in method dispatch order, with duplicates removed.
244 =head2 clone_object Instance -> Instance
246 Clones the given C<Instance> which must be an instance governed by this
249 =head2 clone_instance Instance, Parameters -> Instance
251 Clones the given C<Instance> and sets any additional parameters.