-#!/usr/bin/env perl
package Mouse::Meta::Class;
use strict;
use warnings;
-use Scalar::Util 'blessed';
+use Scalar::Util qw/blessed weaken/;
-use MRO::Compat;
+use Mouse::Util qw/get_linear_isa not_supported/;
-do {
- my %METACLASS_CACHE;
+use Mouse::Meta::Method::Constructor;
+use Mouse::Meta::Method::Destructor;
+use Mouse::Meta::Module;
- # because Mouse doesn't introspect existing classes, we're forced to
- # only pay attention to other Mouse classes
- sub _metaclass_cache {
- my $class = shift;
- my $name = shift;
- return $METACLASS_CACHE{$name};
- }
+use base qw(Mouse::Meta::Module);
- sub initialize {
- my $class = shift;
- my $name = shift;
- $METACLASS_CACHE{$name} = $class->new(name => $name)
- if !exists($METACLASS_CACHE{$name});
- return $METACLASS_CACHE{$name};
- }
-};
+sub method_metaclass(){ 'Mouse::Meta::Method' } # required for get_method()
-sub new {
- my $class = shift;
- my %args = @_;
+sub _construct_meta {
+ my($class, %args) = @_;
+
+ $args{attributes} ||= {};
+ $args{methods} ||= {};
+ $args{roles} ||= [];
- $args{attributes} = {};
$args{superclasses} = do {
no strict 'refs';
- \@{ $args{name} . '::ISA' };
+ \@{ $args{package} . '::ISA' };
};
- bless \%args, $class;
+ #return Mouse::Meta::Class->initialize($class)->new_object(%args)
+ # if $class ne __PACKAGE__;
+
+ return bless \%args, ref($class) || $class;
}
-sub name { $_[0]->{name} }
+sub create_anon_class{
+ my $self = shift;
+ return $self->create(undef, @_);
+}
+
+sub is_anon_class{
+ return exists $_[0]->{anon_serial_id};
+}
+
+sub roles { $_[0]->{roles} }
sub superclasses {
my $self = shift;
@{ $self->{superclasses} } = @_;
}
- @{ $self->{superclasses} };
+ return @{ $self->{superclasses} };
+}
+
+sub find_method_by_name{
+ my($self, $method_name) = @_;
+ defined($method_name)
+ or $self->throw_error('You must define a method name to find');
+ foreach my $class( $self->linearized_isa ){
+ my $method = $self->initialize($class)->get_method($method_name);
+ return $method if defined $method;
+ }
+ return undef;
+}
+
+sub get_all_methods {
+ my($self) = @_;
+ return map{ $self->find_method_by_name($self) } $self->get_all_method_names;
+}
+
+sub get_all_method_names {
+ my $self = shift;
+ my %uniq;
+ return grep { $uniq{$_}++ == 0 }
+ map { Mouse::Meta::Class->initialize($_)->get_method_list() }
+ $self->linearized_isa;
}
sub add_attribute {
my $self = shift;
- my $attr = shift;
- $self->{'attributes'}{$attr->name} = $attr;
+ my($attr, $name);
+
+ if(blessed $_[0]){
+ $attr = $_[0];
+
+ $attr->isa('Mouse::Meta::Attribute')
+ || $self->throw_error("Your attribute must be an instance of Mouse::Meta::Attribute (or a subclass)");
+
+ $name = $attr->name;
+ }
+ else{
+ # _process_attribute
+ $name = shift;
+
+ my %args = (@_ == 1) ? %{$_[0]} : @_;
+
+ defined($name)
+ or $self->throw_error('You must provide a name for the attribute');
+
+ if ($name =~ s/^\+//) { # inherited attributes
+ my $inherited_attr;
+
+ foreach my $class($self->linearized_isa){
+ my $meta = Mouse::Meta::Module::get_metaclass_by_name($class) or next;
+ $inherited_attr = $meta->get_attribute($name) and last;
+ }
+
+ defined($inherited_attr)
+ or $self->throw_error("Could not find an attribute by the name of '$name' to inherit from in ".$self->name);
+
+ $attr = $inherited_attr->clone_and_inherit_options($name, \%args);
+ }
+ else{
+ my($attribute_class, @traits) = Mouse::Meta::Attribute->interpolate_class($name, \%args);
+ $args{traits} = \@traits if @traits;
+
+ $attr = $attribute_class->new($name, \%args);
+ }
+ }
+
+ weaken( $attr->{associated_class} = $self );
+
+ $self->{attributes}{$attr->name} = $attr;
+ $attr->install_accessors();
+
+ if(!$attr->{associated_methods} && ($attr->{is} || '') ne 'bare'){
+ Carp::cluck(qq{Attribute (}.$attr->name.qq{) of class }.$self->name.qq{ has no associated methods (did you mean to provide an "is" argument?)});
+ }
+ return $attr;
}
-sub compute_all_applicable_attributes {
+sub compute_all_applicable_attributes { shift->get_all_attributes(@_) }
+sub get_all_attributes {
my $self = shift;
my (@attr, %seen);
return @attr;
}
-sub get_attribute_map { $_[0]->{attributes} }
-sub has_attribute { exists $_[0]->{attributes}->{$_[1]} }
-sub get_attribute { $_[0]->{attributes}->{$_[1]} }
+sub linearized_isa { @{ get_linear_isa($_[0]->name) } }
+
+sub new_object {
+ my $self = shift;
+ my %args = (@_ == 1 ? %{$_[0]} : @_);
+
+ my $instance = bless {}, $self->name;
+
+ $self->_initialize_instance($instance, \%args);
+ return $instance;
+}
+
+sub _initialize_instance{
+ my($self, $instance, $args) = @_;
+
+ my @triggers_queue;
+
+ foreach my $attribute ($self->get_all_attributes) {
+ my $from = $attribute->init_arg;
+ my $key = $attribute->name;
+
+ if (defined($from) && exists($args->{$from})) {
+ $args->{$from} = $attribute->coerce_constraint($args->{$from})
+ if $attribute->should_coerce;
+
+ $attribute->verify_against_type_constraint($args->{$from});
+
+ $instance->{$key} = $args->{$from};
+
+ weaken($instance->{$key})
+ if ref($instance->{$key}) && $attribute->is_weak_ref;
+
+ if ($attribute->has_trigger) {
+ push @triggers_queue, [ $attribute->trigger, $args->{$from} ];
+ }
+ }
+ else {
+ if ($attribute->has_default || $attribute->has_builder) {
+ unless ($attribute->is_lazy) {
+ my $default = $attribute->default;
+ my $builder = $attribute->builder;
+ my $value = $attribute->has_builder
+ ? $instance->$builder
+ : ref($default) eq 'CODE'
+ ? $default->($instance)
+ : $default;
+
+ $value = $attribute->coerce_constraint($value)
+ if $attribute->should_coerce;
+ $attribute->verify_against_type_constraint($value);
+
+ $instance->{$key} = $value;
+
+ weaken($instance->{$key})
+ if ref($instance->{$key}) && $attribute->is_weak_ref;
+ }
+ }
+ else {
+ if ($attribute->is_required) {
+ $self->throw_error("Attribute (".$attribute->name.") is required");
+ }
+ }
+ }
+ }
+
+ foreach my $trigger_and_value(@triggers_queue){
+ my($trigger, $value) = @{$trigger_and_value};
+ $trigger->($instance, $value);
+ }
+
+ if($self->is_anon_class){
+ $instance->{__METACLASS__} = $self;
+ }
+
+ return $instance;
+}
+
+sub clone_object {
+ my $class = shift;
+ my $instance = shift;
+ my %params = (@_ == 1) ? %{$_[0]} : @_;
-sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } }
+ (blessed($instance) && $instance->isa($class->name))
+ || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($instance)");
+
+ my $clone = bless { %$instance }, ref $instance;
+
+ foreach my $attr ($class->get_all_attributes()) {
+ if ( defined( my $init_arg = $attr->init_arg ) ) {
+ if (exists $params{$init_arg}) {
+ $clone->{ $attr->name } = $params{$init_arg};
+ }
+ }
+ }
+
+ return $clone;
+}
+
+sub clone_instance {
+ my ($class, $instance, %params) = @_;
+
+ Carp::cluck('clone_instance has been deprecated. Use clone_object instead');
+ return $class->clone_object($instance, %params);
+}
+
+sub make_immutable {
+ my $self = shift;
+ my %args = (
+ inline_constructor => 1,
+ inline_destructor => 1,
+ @_,
+ );
+
+ $self->{is_immutable}++;
+
+ if ($args{inline_constructor}) {
+ $self->add_method('new' => Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self ));
+ }
+
+ if ($args{inline_destructor}) {
+ $self->add_method('DESTROY' => Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self ));
+ }
+
+ # Moose's make_immutable returns true allowing calling code to skip setting an explicit true value
+ # at the end of a source file.
+ return 1;
+}
+
+sub make_mutable { not_supported }
+
+sub is_immutable { $_[0]->{is_immutable} }
+sub is_mutable { !$_[0]->{is_immutable} }
+
+sub _install_modifier {
+ my ( $self, $into, $type, $name, $code ) = @_;
+
+ # which is modifer class available?
+ my $modifier_class = do {
+ if (eval "require Class::Method::Modifiers::Fast; 1") {
+ 'Class::Method::Modifiers::Fast';
+ } elsif (eval "require Class::Method::Modifiers; 1") {
+ 'Class::Method::Modifiers';
+ } else {
+ Carp::croak("Method modifiers require the use of Class::Method::Modifiers or Class::Method::Modifiers::Fast. Please install it from CPAN and file a bug report with this application.");
+ }
+ };
+ my $modifier = $modifier_class->can('_install_modifier');
+
+ # replace this method itself :)
+ {
+ no warnings 'redefine';
+ *_install_modifier = sub {
+ my ( $self, $into, $type, $name, $code ) = @_;
+ $modifier->(
+ $into,
+ $type,
+ $name,
+ $code
+ );
+ $self->{methods}{$name}++; # register it to the method map
+ return;
+ };
+ }
+
+ # call me. for first time.
+ $self->_install_modifier( $into, $type, $name, $code );
+}
+
+sub add_before_method_modifier {
+ my ( $self, $name, $code ) = @_;
+ $self->_install_modifier( $self->name, 'before', $name, $code );
+}
+
+sub add_around_method_modifier {
+ my ( $self, $name, $code ) = @_;
+ $self->_install_modifier( $self->name, 'around', $name, $code );
+}
+
+sub add_after_method_modifier {
+ my ( $self, $name, $code ) = @_;
+ $self->_install_modifier( $self->name, 'after', $name, $code );
+}
+
+sub add_override_method_modifier {
+ my ($self, $name, $code) = @_;
+
+ my $package = $self->name;
+
+ my $body = $package->can($name)
+ or $self->throw_error("You cannot override '$name' because it has no super method");
+
+ $self->add_method($name => sub { $code->($package, $body, @_) });
+}
+
+sub does_role {
+ my ($self, $role_name) = @_;
+
+ (defined $role_name)
+ || $self->throw_error("You must supply a role name to look for");
+
+ for my $class ($self->linearized_isa) {
+ my $meta = Mouse::Meta::Module::class_of($class);
+ next unless $meta && $meta->can('roles');
+
+ for my $role (@{ $meta->roles }) {
+
+ return 1 if $role->does_role($role_name);
+ }
+ }
+
+ return 0;
+}
1;
=head1 NAME
-Mouse::Meta::Class - hook into the Mouse MOP
+Mouse::Meta::Class - The Mouse class metaclass
=head1 METHODS
Finds or creates a Mouse::Meta::Class instance for the given ClassName. Only
one instance should exist for a given class.
-=head2 new %args -> Mouse::Meta::Class
-
-Creates a new Mouse::Meta::Class. Don't call this directly.
-
=head2 name -> ClassName
Returns the name of the owner class.
Gets (or sets) the list of superclasses of the owner class.
-=head2 add_attribute Mouse::Meta::Attribute
+=head2 add_attribute (name => spec | Mouse::Meta::Attribute)
Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
class.
-=head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
+=head2 get_all_attributes -> (Mouse::Meta::Attribute)
Returns the list of all L<Mouse::Meta::Attribute> instances associated with
this class and its superclasses.
Returns a mapping of attribute names to their corresponding
L<Mouse::Meta::Attribute> objects.
-=head2 has_attribute Name -> Boool
+=head2 get_attribute_list -> { name => Mouse::Meta::Attribute }
+
+This returns a list of attribute names which are defined in the local
+class. If you want a list of all applicable attributes for a class,
+use the C<get_all_attributes> method.
+
+=head2 has_attribute Name -> Bool
Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
Returns the list of classes in method dispatch order, with duplicates removed.
+=head2 new_object Parameters -> Instance
+
+Create a new instance.
+
+=head2 clone_object Instance -> Instance
+
+Clones the given C<Instance> which must be an instance governed by this
+metaclass.
+
+=head1 SEE ALSO
+
+L<Moose::Meta::Class>
+
=cut
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