2 package Mouse::Meta::Role;
10 # because Mouse doesn't introspect existing classes, we're forced to
11 # only pay attention to other Mouse classes
12 sub _metaclass_cache {
15 return $METACLASS_CACHE{$name};
21 $METACLASS_CACHE{$name} = $class->new(name => $name)
22 if !exists($METACLASS_CACHE{$name});
23 return $METACLASS_CACHE{$name};
31 $args{attributes} ||= {};
32 $args{required_methods} ||= [];
38 sub name { $_[0]->{name} }
40 sub add_required_methods {
43 push @{$self->{required_methods}}, @methods;
50 $self->{attributes}->{$name} = $spec;
53 sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
54 sub get_attribute_list { keys %{ $_[0]->{attributes} } }
55 sub get_attribute { $_[0]->{attributes}->{$_[1]} }
57 # copied from Class::Inspector
60 my $name = $self->name;
63 # Get all the CODE symbol table entries
64 my @functions = grep !/^meta$/,
65 grep { /\A[^\W\d]\w*\z/o }
66 grep { defined &{"${name}::$_"} }
68 wantarray ? @functions : \@functions;
73 my $selfname = $self->name;
75 my $classname = $class->name;
78 if ($class->isa('Mouse::Meta::Class')) {
79 for my $name (@{$self->{required_methods}}) {
80 unless ($classname->can($name)) {
81 confess "'$selfname' requires the method '$name' to be implemented by '$classname'";
88 for my $name ($self->get_method_list) {
89 next if $name eq 'has' || $name eq 'requires' || $name eq 'meta' || $name eq 'with' || $name eq 'around' || $name eq 'before' || $name eq 'after' || $name eq 'blessed' || $name eq 'extends' || $name eq 'confess' || $name eq 'excludes';
90 my $dstname = $args{alias} ? ($args{alias}->{$name}||$name) : $name;
91 if ($classname->can($dstname)) {
92 # XXX what's Moose's behavior?
95 *{"${classname}::${dstname}"} = *{"${selfname}::${name}"};
99 if ($class->isa('Mouse::Meta::Class')) {
100 # apply role to class
101 for my $name ($self->get_attribute_list) {
102 next if $class->has_attribute($name);
103 my $spec = $self->get_attribute($name);
104 Mouse::Meta::Attribute->create($class, $name, %$spec);
108 # XXX Room for speed improvement
109 for my $name ($self->get_attribute_list) {
110 next if $class->has_attribute($name);
111 my $spec = $self->get_attribute($name);
112 $class->add_attribute($name, $spec);
116 # XXX Room for speed improvement in role to role
117 for my $modifier_type (qw/before after around/) {
118 my $add_method = "add_${modifier_type}_method_modifier";
119 my $modified = $self->{"${modifier_type}_method_modifiers"};
121 for my $method_name (keys %$modified) {
122 for my $code (@{ $modified->{$method_name} }) {
123 $class->$add_method($method_name => $code);
129 push @{ $class->roles }, $self, @{ $self->roles };
132 for my $modifier_type (qw/before after around/) {
134 *{ __PACKAGE__ . '::' . "add_${modifier_type}_method_modifier" } = sub {
135 my ($self, $method_name, $method) = @_;
137 push @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} },
141 *{ __PACKAGE__ . '::' . "get_${modifier_type}_method_modifiers" } = sub {
142 my ($self, $method_name, $method) = @_;
143 @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} || [] }
147 sub roles { $_[0]->{roles} }