2 package Mouse::Meta::Class;
6 use Mouse::Util qw/get_linear_isa blessed/;
12 # because Mouse doesn't introspect existing classes, we're forced to
13 # only pay attention to other Mouse classes
14 sub _metaclass_cache {
17 return $METACLASS_CACHE{$name};
23 $METACLASS_CACHE{$name} = $class->new(name => $name)
24 if !exists($METACLASS_CACHE{$name});
25 return $METACLASS_CACHE{$name};
33 $args{attributes} = {};
34 $args{superclasses} = do {
36 \@{ $args{name} . '::ISA' };
42 sub name { $_[0]->{name} }
48 Mouse::load_class($_) for @_;
49 @{ $self->{superclasses} } = @_;
52 @{ $self->{superclasses} };
60 my $pkg = $self->name;
63 *{ $pkg . '::' . $name } = $code;
66 # copied from Class::Inspector
69 my $name = $self->name;
72 # Get all the CODE symbol table entries
73 my @functions = grep !/^meta$/,
74 grep { /\A[^\W\d]\w*\z/o }
75 grep { defined &{"${name}::$_"} }
77 wantarray ? @functions : \@functions;
84 $self->{'attributes'}{$attr->name} = $attr;
87 sub compute_all_applicable_attributes {
91 for my $class ($self->linearized_isa) {
92 my $meta = $self->_metaclass_cache($class)
95 for my $name (keys %{ $meta->get_attribute_map }) {
96 next if $seen{$name}++;
97 push @attr, $meta->get_attribute($name);
104 sub get_attribute_map { $_[0]->{attributes} }
105 sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
106 sub get_attribute { $_[0]->{attributes}->{$_[1]} }
108 sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
112 my $instance = shift;
114 (blessed($instance) && $instance->isa($class->name))
115 || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)";
117 $class->clone_instance($instance, @_);
121 my ($class, $instance, %params) = @_;
124 || confess "You can only clone instances, ($instance) is not a blessed instance";
126 my $clone = bless { %$instance }, ref $instance;
128 foreach my $attr ($class->compute_all_applicable_attributes()) {
129 if ( defined( my $init_arg = $attr->init_arg ) ) {
130 if (exists $params{$init_arg}) {
131 $clone->{ $attr->name } = $params{$init_arg};
140 sub make_immutable {}
141 sub is_immutable { 0 }
143 sub attribute_metaclass { "Mouse::Meta::Class" }
145 sub add_before_method_modifier {
146 my ($self, $name, $code) = @_;
147 require Class::Method::Modifiers;
148 Class::Method::Modifiers::_install_modifier(
156 sub add_around_method_modifier {
157 my ($self, $name, $code) = @_;
158 require Class::Method::Modifiers;
159 Class::Method::Modifiers::_install_modifier(
167 sub add_after_method_modifier {
168 my ($self, $name, $code) = @_;
169 require Class::Method::Modifiers;
170 Class::Method::Modifiers::_install_modifier(
184 Mouse::Meta::Class - hook into the Mouse MOP
188 =head2 initialize ClassName -> Mouse::Meta::Class
190 Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only
191 one instance should exist for a given class.
193 =head2 new %args -> Mouse::Meta::Class
195 Creates a new Mouse::Meta::Class. Don't call this directly.
197 =head2 name -> ClassName
199 Returns the name of the owner class.
201 =head2 superclasses -> [ClassName]
203 Gets (or sets) the list of superclasses of the owner class.
205 =head2 add_attribute Mouse::Meta::Attribute
207 Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
210 =head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
212 Returns the list of all L<Mouse::Meta::Attribute> instances associated with
213 this class and its superclasses.
215 =head2 get_attribute_map -> { name => Mouse::Meta::Attribute }
217 Returns a mapping of attribute names to their corresponding
218 L<Mouse::Meta::Attribute> objects.
220 =head2 has_attribute Name -> Boool
222 Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
224 =head2 get_attribute Name -> Mouse::Meta::Attribute | undef
226 Returns the L<Mouse::Meta::Attribute> with the given name.
228 =head2 linearized_isa -> [ClassNames]
230 Returns the list of classes in method dispatch order, with duplicates removed.
232 =head2 clone_object Instance -> Instance
234 Clones the given C<Instance> which must be an instance governed by this
237 =head2 clone_instance Instance, Parameters -> Instance
239 Clones the given C<Instance> and sets any additional parameters.