X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FClass.pm;h=51a496f125a3bf5777e960819cda5916c173921c;hp=ea7c8960c99d0888a239e76790c0bf54248070b2;hb=f18ecf2a2722afd64a24f543fe503ae9dc969e86;hpb=306290e864ac23e5f1692c8495b0c173081a1ebb diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm index ea7c896..51a496f 100644 --- a/lib/Mouse/Meta/Class.pm +++ b/lib/Mouse/Meta/Class.pm @@ -1,35 +1,47 @@ -#!/usr/bin/env perl package Mouse::Meta::Class; use strict; use warnings; -use MRO::Compat; +use Scalar::Util qw/blessed weaken/; -do { - my %METACLASS_CACHE; - sub initialize { - my $class = shift; - my $name = shift; - $METACLASS_CACHE{$name} = $class->new(name => $name) - if !exists($METACLASS_CACHE{$name}); - return $METACLASS_CACHE{$name}; - } -}; +use Mouse::Util qw/get_linear_isa not_supported/; + +use Mouse::Meta::Method::Constructor; +use Mouse::Meta::Method::Destructor; +use Mouse::Meta::Module; + +use base qw(Mouse::Meta::Module); + +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; @@ -39,20 +51,317 @@ sub superclasses { @{ $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 { shift->get_all_attributes(@_) } +sub get_all_attributes { + my $self = shift; + my (@attr, %seen); + + for my $class ($self->linearized_isa) { + my $meta = $self->_metaclass_cache($class) + or next; + + for my $name (keys %{ $meta->get_attribute_map }) { + next if $seen{$name}++; + push @attr, $meta->get_attribute($name); + } + } + + return @attr; +} + +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]} : @_; + + (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 get_attribute_map { $_[0]->{attributes} } -sub get_attribute { $_[0]->{attributes}->{$_[1]} } +sub add_before_method_modifier { + my ( $self, $name, $code ) = @_; + $self->_install_modifier( $self->name, 'before', $name, $code ); +} -sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } } +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; @@ -60,7 +369,7 @@ __END__ =head1 NAME -Mouse::Meta::Class - hook into the Mouse MOP +Mouse::Meta::Class - The Mouse class metaclass =head1 METHODS @@ -69,10 +378,6 @@ Mouse::Meta::Class - hook into the Mouse MOP 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. @@ -81,16 +386,31 @@ 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 for the owner class. +=head2 get_all_attributes -> (Mouse::Meta::Attribute) + +Returns the list of all L instances associated with +this class and its superclasses. + =head2 get_attribute_map -> { name => Mouse::Meta::Attribute } Returns a mapping of attribute names to their corresponding L objects. +=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 method. + +=head2 has_attribute Name -> Bool + +Returns whether we have a L with the given name. + =head2 get_attribute Name -> Mouse::Meta::Attribute | undef Returns the L with the given name. @@ -99,5 +419,18 @@ Returns the L 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 which must be an instance governed by this +metaclass. + +=head1 SEE ALSO + +L + =cut