package Mouse::Meta::Role;
use strict;
use warnings;
+use Carp 'confess';
do {
my %METACLASS_CACHE;
my $class = shift;
my %args = @_;
- $args{attributes} ||= {};
+ $args{attributes} ||= {};
+ $args{required_methods} ||= [];
+ $args{roles} ||= [];
bless \%args, $class;
}
sub name { $_[0]->{name} }
+sub add_required_methods {
+ my $self = shift;
+ my @methods = @_;
+ push @{$self->{required_methods}}, @methods;
+}
+
sub add_attribute {
my $self = shift;
my $name = shift;
- $self->{attributes}->{$name} = [ @_ ];
+ my $spec = shift;
+ $self->{attributes}->{$name} = $spec;
}
sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
sub get_attribute_list { keys %{ $_[0]->{attributes} } }
-sub get_attribute { @{ $_->[0]->{attributes}->{$_[1]} || [] } }
+sub get_attribute { $_[0]->{attributes}->{$_[1]} }
+
+# copied from Class::Inspector
+sub get_method_list {
+ my $self = shift;
+ my $name = $self->name;
+
+ no strict 'refs';
+ # Get all the CODE symbol table entries
+ my @functions = grep !/^meta$/,
+ grep { /\A[^\W\d]\w*\z/o }
+ grep { defined &{"${name}::$_"} }
+ keys %{"${name}::"};
+ wantarray ? @functions : \@functions;
+}
sub apply {
my $self = shift;
+ my $selfname = $self->name;
my $class = shift;
- my $pkg = $class->name;
+ my $classname = $class->name;
+ my %args = @_;
+
+ if ($class->isa('Mouse::Meta::Class')) {
+ for my $name (@{$self->{required_methods}}) {
+ unless ($classname->can($name)) {
+ confess "'$selfname' requires the method '$name' to be implemented by '$classname'";
+ }
+ }
+ }
+
+ {
+ no strict 'refs';
+ for my $name ($self->get_method_list) {
+ 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' || $name eq 'excludes';
+
+ if ($classname->can($name)) {
+ # XXX what's Moose's behavior?
+ #next;
+ } else {
+ *{"${classname}::${name}"} = *{"${selfname}::${name}"};
+ }
+ if ($args{alias} && $args{alias}->{$name}) {
+ my $dstname = $args{alias}->{$name};
+ unless ($classname->can($dstname)) {
+ *{"${classname}::${dstname}"} = *{"${selfname}::${name}"};
+ }
+ }
+ }
+ }
+
+ if ($class->isa('Mouse::Meta::Class')) {
+ # apply role to class
+ for my $name ($self->get_attribute_list) {
+ next if $class->has_attribute($name);
+ my $spec = $self->get_attribute($name);
+ Mouse::Meta::Attribute->create($class, $name, %$spec);
+ }
+ } else {
+ # apply role to role
+ # XXX Room for speed improvement
+ for my $name ($self->get_attribute_list) {
+ next if $class->has_attribute($name);
+ my $spec = $self->get_attribute($name);
+ $class->add_attribute($name, $spec);
+ }
+ }
+
+ # XXX Room for speed improvement in role to role
+ for my $modifier_type (qw/before after around/) {
+ my $add_method = "add_${modifier_type}_method_modifier";
+ my $modified = $self->{"${modifier_type}_method_modifiers"};
+
+ for my $method_name (keys %$modified) {
+ for my $code (@{ $modified->{$method_name} }) {
+ $class->$add_method($method_name => $code);
+ }
+ }
+ }
- for my $name ($self->get_attribute_list) {
- my @spec = $self->get_attribute($name);
- Mouse::Meta::Attribute->create($pkg, $name, @spec);
+ # append roles
+ push @{ $class->roles }, $self, @{ $self->roles };
+}
+
+sub combine_apply {
+ my(undef, $class, @roles) = @_;
+ my $classname = $class->name;
+
+ if ($class->isa('Mouse::Meta::Class')) {
+ for my $role_spec (@roles) {
+ my $self = $role_spec->[0]->meta;
+ for my $name (@{$self->{required_methods}}) {
+ unless ($classname->can($name)) {
+ my $method_required = 0;
+ for my $role (@roles) {
+ $method_required = 1 if $self->name ne $role->[0] && $role->[0]->can($name);
+ }
+ confess "'".$self->name."' requires the method '$name' to be implemented by '$classname'"
+ unless $method_required;
+ }
+ }
+ }
+ }
+
+ {
+ no strict 'refs';
+ for my $role_spec (@roles) {
+ my $self = $role_spec->[0]->meta;
+ my $selfname = $self->name;
+ my %args = %{ $role_spec->[1] };
+ for my $name ($self->get_method_list) {
+ 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' || $name eq 'excludes';
+
+ if ($classname->can($name)) {
+ # XXX what's Moose's behavior?
+ #next;
+ } else {
+ *{"${classname}::${name}"} = *{"${selfname}::${name}"};
+ }
+ if ($args{alias} && $args{alias}->{$name}) {
+ my $dstname = $args{alias}->{$name};
+ unless ($classname->can($dstname)) {
+ *{"${classname}::${dstname}"} = *{"${selfname}::${name}"};
+ }
+ }
+ }
+ }
+ }
+
+
+ if ($class->isa('Mouse::Meta::Class')) {
+ # apply role to class
+ for my $role_spec (@roles) {
+ my $self = $role_spec->[0]->meta;
+ for my $name ($self->get_attribute_list) {
+ next if $class->has_attribute($name);
+ my $spec = $self->get_attribute($name);
+ Mouse::Meta::Attribute->create($class, $name, %$spec);
+ }
+ }
+ } else {
+ # apply role to role
+ # XXX Room for speed improvement
+ for my $role_spec (@roles) {
+ my $self = $role_spec->[0]->meta;
+ for my $name ($self->get_attribute_list) {
+ next if $class->has_attribute($name);
+ my $spec = $self->get_attribute($name);
+ $class->add_attribute($name, $spec);
+ }
+ }
}
+ # XXX Room for speed improvement in role to role
+ for my $modifier_type (qw/before after around/) {
+ my $add_method = "add_${modifier_type}_method_modifier";
+ for my $role_spec (@roles) {
+ my $self = $role_spec->[0]->meta;
+ my $modified = $self->{"${modifier_type}_method_modifiers"};
+
+ for my $method_name (keys %$modified) {
+ for my $code (@{ $modified->{$method_name} }) {
+ $class->$add_method($method_name => $code);
+ }
+ }
+ }
+ }
+
+ # append roles
+ my %role_apply_cache;
+ my @apply_roles;
+ for my $role_spec (@roles) {
+ my $self = $role_spec->[0]->meta;
+ push @apply_roles, $self unless $role_apply_cache{$self}++;
+ for my $role ($self->roles) {
+ push @apply_roles, $role unless $role_apply_cache{$role}++;
+ }
+ }
}
+for my $modifier_type (qw/before after around/) {
+ no strict 'refs';
+ *{ __PACKAGE__ . '::' . "add_${modifier_type}_method_modifier" } = sub {
+ my ($self, $method_name, $method) = @_;
+
+ push @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} },
+ $method;
+ };
+
+ *{ __PACKAGE__ . '::' . "get_${modifier_type}_method_modifiers" } = sub {
+ my ($self, $method_name, $method) = @_;
+ @{ $self->{"${modifier_type}_method_modifiers"}->{$method_name} || [] }
+ };
+}
+
+sub roles { $_[0]->{roles} }
+
1;
projects / gitmo/Mouse.git / blobdiff