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=1093e0220f30b275a1cd8d79d2c181086fdc6878;hp=42f824e57f91d018a6b7908efc210905820f756b;hb=121acb8a89acd75e7a664241df7e8220d864c879;hpb=66eea168570f52254def2675f86706336ab9bd8a diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm index 42f824e..1093e02 100644 --- a/lib/Mouse/Meta/Class.pm +++ b/lib/Mouse/Meta/Class.pm @@ -1,46 +1,47 @@ -#!/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; @@ -50,17 +51,69 @@ 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} = $attr; + if (@_ == 1 && blessed($_[0])) { + my $attr = shift @_; + $self->{'attributes'}{$attr->name} = $attr; + } + else { + my $names = shift @_; + $names = [$names] if !ref($names); + my $metaclass = 'Mouse::Meta::Attribute'; + my %options = (@_ == 1 ? %{$_[0]} : @_); + + if ( my $metaclass_name = delete $options{metaclass} ) { + my $new_class = Mouse::Util::resolve_metaclass_alias( + 'Attribute', + $metaclass_name + ); + if ( $metaclass ne $new_class ) { + $metaclass = $new_class; + } + } + + for my $name (@$names) { + if ($name =~ s/^\+//) { + $metaclass->clone_parent($self, $name, %options); + } + else { + $metaclass->create($self, $name, %options); + } + } + } } -sub compute_all_applicable_attributes { +sub compute_all_applicable_attributes { shift->get_all_attributes(@_) } +sub get_all_attributes { my $self = shift; my (@attr, %seen); @@ -77,11 +130,212 @@ sub compute_all_applicable_attributes { 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 {}, $self->name; -sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } } + 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 $instance = shift; + + (blessed($instance) && $instance->isa($class->name)) + || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($instance)"); + + $class->clone_instance($instance, @_); +} + +sub clone_instance { + my ($class, $instance, %params) = @_; + + (blessed($instance)) + || $class->throw_error("You can only clone instances, ($instance) is not a blessed 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 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; @@ -110,12 +364,12 @@ 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 (Mouse::Meta::Attribute| name => spec) Begins keeping track of the existing L 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 instances associated with this class and its superclasses. @@ -125,7 +379,13 @@ this class and its superclasses. Returns a mapping of attribute names to their corresponding L 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 method. + +=head2 has_attribute Name -> Bool Returns whether we have a L with the given name. @@ -137,5 +397,15 @@ Returns the L with the given name. Returns the list of classes in method dispatch order, with duplicates removed. +=head2 clone_object Instance -> Instance + +Clones the given C which must be an instance governed by this +metaclass. + +=head2 clone_instance Instance, Parameters -> Instance + +The clone_instance method has been made private. +The public version is deprecated. + =cut