package Mouse::Meta::Module;
-use strict;
-use warnings;
+use Mouse::Util qw/:meta get_code_package get_code_ref not_supported/; # enables strict and warnings
-use Carp ();
-use Scalar::Util qw/blessed weaken/;
+use Carp ();
+use Scalar::Util ();
-use Mouse::Util qw/get_code_info not_supported load_class/;
+my %METAS;
-{
- my %METACLASS_CACHE;
+if(Mouse::Util::MOUSE_XS){
+ # register meta storage for performance
+ Mouse::Util::__register_metaclass_storage(\%METAS, 0);
- # because Mouse doesn't introspect existing classes, we're forced to
- # only pay attention to other Mouse classes
- sub _metaclass_cache {
- my($class, $name) = @_;
- return $METACLASS_CACHE{$name};
- }
+ # ensure thread safety
+ *CLONE = sub { Mouse::Util::__register_metaclass_storage(\%METAS, 1) };
+}
- sub initialize {
- my($class, $package_name, @args) = @_;
+sub _metaclass_cache { # DEPRECATED
+ my($class, $name) = @_;
+ Carp::cluck('_metaclass_cache() has been deprecated. Use Mouse::Util::get_metaclass_by_name() instead');
+ return $METAS{$name};
+}
- ($package_name && !ref($package_name))
- || $class->throw_error("You must pass a package name and it cannot be blessed");
+sub initialize {
+ my($class, $package_name, @args) = @_;
- return $METACLASS_CACHE{$package_name}
- ||= $class->_construct_meta(package => $package_name, @args);
- }
+ ($package_name && !ref($package_name))
+ || $class->throw_error("You must pass a package name and it cannot be blessed");
- sub class_of{
- my($class_or_instance) = @_;
- return undef unless defined $class_or_instance;
- return $METACLASS_CACHE{ blessed($class_or_instance) || $class_or_instance };
- }
+ return $METAS{$package_name}
+ ||= $class->_construct_meta(package => $package_name, @args);
+}
+
+sub reinitialize {
+ my($class, $package_name, @args) = @_;
- # Means of accessing all the metaclasses that have
- # been initialized thus far
- sub get_all_metaclasses { %METACLASS_CACHE }
- sub get_all_metaclass_instances { values %METACLASS_CACHE }
- sub get_all_metaclass_names { keys %METACLASS_CACHE }
- sub get_metaclass_by_name { $METACLASS_CACHE{$_[0]} }
- sub store_metaclass_by_name { $METACLASS_CACHE{$_[0]} = $_[1] }
- sub weaken_metaclass { weaken($METACLASS_CACHE{$_[0]}) }
- sub does_metaclass_exist { defined $METACLASS_CACHE{$_[0]} }
- sub remove_metaclass_by_name { delete $METACLASS_CACHE{$_[0]} }
+ $package_name = $package_name->name if ref $package_name;
+ ($package_name && !ref($package_name))
+ || $class->throw_error("You must pass a package name and it cannot be blessed");
+
+ delete $METAS{$package_name};
+ return $class->initialize($package_name, @args);
}
-sub meta{ Mouse::Meta::Class->initialize(ref $_[0] || $_[0]) }
+sub _class_of{
+ my($class_or_instance) = @_;
+ return undef unless defined $class_or_instance;
+ return $METAS{ ref($class_or_instance) || $class_or_instance };
+}
-sub _new{ Carp::croak("Mouse::Meta::Module is an abstract class") }
+# Means of accessing all the metaclasses that have
+# been initialized thus far
+#sub _get_all_metaclasses { %METAS }
+sub _get_all_metaclass_instances { values %METAS }
+sub _get_all_metaclass_names { keys %METAS }
+sub _get_metaclass_by_name { $METAS{$_[0]} }
+#sub _store_metaclass_by_name { $METAS{$_[0]} = $_[1] }
+#sub _weaken_metaclass { weaken($METAS{$_[0]}) }
+#sub _does_metaclass_exist { defined $METAS{$_[0]} }
+#sub _remove_metaclass_by_name { delete $METAS{$_[0]} }
-sub name { $_[0]->{package} }
+sub name;
-sub version { no strict 'refs'; ${shift->name.'::VERSION'} }
-sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} }
-sub identifier {
- my $self = shift;
- return join '-' => (
- $self->name,
- ($self->version || ()),
- ($self->authority || ()),
- );
-}
+sub namespace;
# add_attribute is an abstract method
-sub get_attribute_map { $_[0]->{attributes} }
+sub get_attribute_map { # DEPRECATED
+ Carp::cluck('get_attribute_map() has been deprecated. Use get_attribute_list() and get_attribute() instead');
+ return $_[0]->{attributes};
+}
+
sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
sub get_attribute { $_[0]->{attributes}->{$_[1]} }
-sub get_attribute_list{ keys %{$_[0]->{attributes}} }
sub remove_attribute { delete $_[0]->{attributes}->{$_[1]} }
-sub namespace{
- my $name = $_[0]->{package};
- no strict 'refs';
- return \%{ $name . '::' };
-}
-
-sub add_method {
- my($self, $name, $code) = @_;
-
- if(!defined $name){
- $self->throw_error("You must pass a defined name");
- }
- if(ref($code) ne 'CODE'){
- not_supported 'add_method for a method object';
- }
+sub get_attribute_list{ keys %{$_[0]->{attributes}} }
- $self->{methods}->{$name}++; # Moose stores meta object here.
+# XXX: for backward compatibility
+my %foreign = map{ $_ => undef } qw(
+ Mouse Mouse::Role Mouse::Util Mouse::Util::TypeConstraints
+ Carp Scalar::Util List::Util
+);
+sub _code_is_mine{
+# my($self, $code) = @_;
- my $pkg = $self->name;
- no strict 'refs';
- no warnings 'redefine';
- *{ $pkg . '::' . $name } = $code;
+ return !exists $foreign{ get_code_package($_[1]) };
}
-sub _code_is_mine { # taken from Class::MOP::Class
- my ( $self, $code ) = @_;
+sub add_method;
- my ( $code_package, $code_name ) = get_code_info($code);
+sub has_method {
+ my($self, $method_name) = @_;
- return $code_package && $code_package eq $self->name
- || ( $code_package eq 'constant' && $code_name eq '__ANON__' );
+ defined($method_name)
+ or $self->throw_error('You must define a method name');
+
+ return defined($self->{methods}{$method_name}) || do{
+ my $code = get_code_ref($self->{package}, $method_name);
+ $code && $self->_code_is_mine($code);
+ };
}
-sub has_method {
+sub get_method_body {
my($self, $method_name) = @_;
- return 1 if $self->{methods}->{$method_name};
- my $code = $self->name->can($method_name);
+ defined($method_name)
+ or $self->throw_error('You must define a method name');
- return $code && $self->_code_is_mine($code);
+ return $self->{methods}{$method_name} ||= do{
+ my $code = get_code_ref($self->{package}, $method_name);
+ $code && $self->_code_is_mine($code) ? $code : undef;
+ };
}
sub get_method{
my($self, $method_name) = @_;
- if($self->has_method($method_name)){
- my $method_metaclass = $self->method_metaclass;
- load_class($method_metaclass);
-
- my $package = $self->name;
- return $method_metaclass->new(
- body => $package->can($method_name),
- name => $method_name,
- package => $package,
+ if(my $code = $self->get_method_body($method_name)){
+ return Mouse::Util::load_class($self->method_metaclass)->wrap(
+ body => $code,
+ name => $method_name,
+ package => $self->name,
+ associated_metaclass => $self,
);
}
return grep { $self->has_method($_) } keys %{ $self->namespace };
}
-{
- my $ANON_SERIAL = 0;
- my $ANON_PREFIX = 'Mouse::Meta::Module::__ANON__::';
+sub _collect_methods { # Mouse specific
+ my($meta, @args) = @_;
- my %IMMORTALS;
+ my @methods;
+ foreach my $arg(@args){
+ if(my $type = ref $arg){
+ if($type eq 'Regexp'){
+ push @methods, grep { $_ =~ $arg } $meta->get_all_method_names;
+ }
+ elsif($type eq 'ARRAY'){
+ push @methods, @{$arg};
+ }
+ else{
+ my $subname = ( caller(1) )[3];
+ $meta->throw_error(
+ sprintf(
+ 'Methods passed to %s must be provided as a list, ArrayRef or regular expression, not %s',
+ $subname,
+ $type,
+ )
+ );
+ }
+ }
+ else{
+ push @methods, $arg;
+ }
+ }
+ return @methods;
+}
- sub create {
- my ($class, $package_name, %options) = @_;
+my $ANON_SERIAL = 0; # anonymous class/role id
+my %IMMORTALS; # immortal anonymous classes
- $class->throw_error('You must pass a package name') if @_ == 1;
+sub create {
+ my($self, $package_name, %options) = @_;
+ my $class = ref($self) || $self;
+ $self->throw_error('You must pass a package name') if @_ < 2;
- if(exists $options{superclasses}){
- if($class->isa('Mouse::Meta::Class')){
- (ref $options{superclasses} eq 'ARRAY')
- || $class->throw_error("You must pass an ARRAY ref of superclasses");
- }
- else{ # role
- delete $options{superclasses};
- }
+ my $superclasses;
+ if(exists $options{superclasses}){
+ if(Mouse::Util::is_a_metarole($self)){
+ delete $options{superclasses};
}
-
- my $attributes;
- if(exists $options{attributes}){
- $attributes = delete $options{attributes};
- (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH')
- || $class->throw_error("You must pass an ARRAY ref of attributes")
- }
-
- (ref $options{methods} eq 'HASH')
- || $class->throw_error("You must pass a HASH ref of methods")
- if exists $options{methods};
-
- (ref $options{roles} eq 'ARRAY')
- || $class->throw_error("You must pass an ARRAY ref of roles")
- if exists $options{roles};
-
-
- my @extra_options;
- my $mortal;
- my $cache_key;
-
- if(!defined $package_name){ # anonymous
- $mortal = !$options{cache};
-
- # anonymous but immortal
- if(!$mortal){
- # something like Super::Class|Super::Class::2=Role|Role::1
- $cache_key = join '=' => (
- join('|', @{$options{superclasses} || []}),
- join('|', sort @{$options{roles} || []}),
- );
- return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key};
- }
- $package_name = $ANON_PREFIX . ++$ANON_SERIAL;
-
- push @extra_options, (anon_serial_id => $ANON_SERIAL);
+ else{
+ $superclasses = delete $options{superclasses};
+ (ref $superclasses eq 'ARRAY')
+ || $self->throw_error("You must pass an ARRAY ref of superclasses");
}
+ }
- # instantiate a module
- {
- no strict 'refs';
- ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version};
- ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority};
+ my $attributes = delete $options{attributes};
+ if(defined $attributes){
+ (ref $attributes eq 'ARRAY' || ref $attributes eq 'HASH')
+ || $self->throw_error("You must pass an ARRAY ref of attributes");
+ }
+ my $methods = delete $options{methods};
+ if(defined $methods){
+ (ref $methods eq 'HASH')
+ || $self->throw_error("You must pass a HASH ref of methods");
+ }
+ my $roles = delete $options{roles};
+ if(defined $roles){
+ (ref $roles eq 'ARRAY')
+ || $self->throw_error("You must pass an ARRAY ref of roles");
+ }
+ my $mortal;
+ my $cache_key;
+
+ if(!defined $package_name){ # anonymous
+ $mortal = !$options{cache};
+
+ # anonymous but immortal
+ if(!$mortal){
+ # something like Super::Class|Super::Class::2=Role|Role::1
+ $cache_key = join '=' => (
+ join('|', @{$superclasses || []}),
+ join('|', sort @{$roles || []}),
+ );
+ return $IMMORTALS{$cache_key} if exists $IMMORTALS{$cache_key};
}
+ $options{anon_serial_id} = ++$ANON_SERIAL;
+ $package_name = $class . '::__ANON__::' . $ANON_SERIAL;
+ }
- my %initialize_options = %options;
- delete @initialize_options{qw(
- package
- superclasses
- attributes
- methods
- roles
- )};
- my $meta = $class->initialize( $package_name, %initialize_options, @extra_options);
-
- Mouse::Meta::Module::weaken_metaclass($package_name)
- if $mortal;
-
- # FIXME totally lame
- $meta->add_method('meta' => sub {
- $class->initialize(ref($_[0]) || $_[0]);
- });
-
- $meta->superclasses(@{$options{superclasses}})
- if exists $options{superclasses};
-
- # NOTE:
- # process attributes first, so that they can
- # install accessors, but locally defined methods
- # can then overwrite them. It is maybe a little odd, but
- # I think this should be the order of things.
- if (defined $attributes) {
- if(ref($attributes) eq 'ARRAY'){
- foreach my $attr (@{$attributes}) {
- $meta->add_attribute($attr->{name} => $attr);
- }
- }
- else{
- while(my($name, $attr) = each %{$attributes}){
- $meta->add_attribute($name => $attr);
- }
+ # instantiate a module
+ {
+ no strict 'refs';
+ ${ $package_name . '::VERSION' } = delete $options{version} if exists $options{version};
+ ${ $package_name . '::AUTHORITY' } = delete $options{authority} if exists $options{authority};
+ }
+
+ my $meta = $self->initialize( $package_name, %options);
+
+ Scalar::Util::weaken $METAS{$package_name}
+ if $mortal;
+
+ $meta->add_method(meta => sub{
+ $self->initialize(ref($_[0]) || $_[0]);
+ });
+
+ $meta->superclasses(@{$superclasses})
+ if defined $superclasses;
+
+ # NOTE:
+ # process attributes first, so that they can
+ # install accessors, but locally defined methods
+ # can then overwrite them. It is maybe a little odd, but
+ # I think this should be the order of things.
+ if (defined $attributes) {
+ if(ref($attributes) eq 'ARRAY'){
+ # array of Mouse::Meta::Attribute
+ foreach my $attr (@{$attributes}) {
+ $meta->add_attribute($attr);
}
}
- if (exists $options{methods}) {
- foreach my $method_name (keys %{$options{methods}}) {
- $meta->add_method($method_name, $options{methods}->{$method_name});
+ else{
+ # hash map of name and attribute spec pairs
+ while(my($name, $attr) = each %{$attributes}){
+ $meta->add_attribute($name => $attr);
}
}
- if (exists $options{roles}){
- Mouse::Util::apply_all_roles($package_name, @{$options{roles}});
- }
-
- if(!$mortal && exists $meta->{anon_serial_id}){
- $IMMORTALS{$cache_key} = $meta;
+ }
+ if (defined $methods) {
+ while(my($method_name, $method_body) = each %{$methods}){
+ $meta->add_method($method_name, $method_body);
}
+ }
+ if (defined $roles){
+ Mouse::Util::apply_all_roles($package_name, @{$roles});
+ }
- return $meta;
+ if($cache_key){
+ $IMMORTALS{$cache_key} = $meta;
}
- sub DESTROY{
- my($self) = @_;
+ return $meta;
+}
- my $serial_id = $self->{anon_serial_id};
+sub DESTROY{
+ my($self) = @_;
- return if !$serial_id;
+ return if $Mouse::Util::in_global_destruction;
- my $stash = $self->namespace;
+ my $serial_id = $self->{anon_serial_id};
- @{$self->{superclasses}} = () if exists $self->{superclasses};
- %{$stash} = ();
- Mouse::Meta::Module::remove_metaclass_by_name($self->name);
+ return if !$serial_id;
+ # mortal anonymous class
- no strict 'refs';
- delete ${$ANON_PREFIX}{ $serial_id . '::' };
+ # @ISA is a magical variable, so we clear it manually.
+ @{$self->{superclasses}} = () if exists $self->{superclasses};
- return;
- }
+ # Then, clear the symbol table hash
+ %{$self->namespace} = ();
+
+ my $name = $self->name;
+ delete $METAS{$name};
+
+ $name =~ s/ $serial_id \z//xms;
+
+ no strict 'refs';
+ delete ${$name}{ $serial_id . '::' };
+
+ return;
}
sub throw_error{
}
1;
-
__END__
=head1 NAME
-Mouse::Meta::Module - Common base class for Mouse::Meta::Class and Mouse::Meta::Role
+Mouse::Meta::Module - The base class for Mouse::Meta::Class and Mouse::Meta::Role
+
+=head1 VERSION
+
+This document describes Mouse version 0.50_03
+
+=head1 SEE ALSO
+
+L<Class::MOP::Class>
+
+L<Class::MOP::Module>
+
+L<Class::MOP::Package>
=cut
+
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