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=3113b83514791a0f3139b022f2d69a3ccb14036d;hp=8e89567673f0389743dbd1164f7b65cfe8bc3f9a;hb=ff6870694bb440c13826e0f0fa25e760247fd24e;hpb=60f6eba91f12d48fa30a8e16abe2db8c95b4d878 diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm index 8e89567..3113b83 100644 --- a/lib/Mouse/Meta/Class.pm +++ b/lib/Mouse/Meta/Class.pm @@ -4,45 +4,29 @@ use warnings; use Mouse::Meta::Method::Constructor; use Mouse::Meta::Method::Destructor; -use Scalar::Util qw/blessed/; -use Mouse::Util qw/get_linear_isa/; -use Carp 'confess'; - -do { - my %METACLASS_CACHE; - - # 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 Scalar::Util qw/blessed weaken/; +use Mouse::Util qw/get_linear_isa not_supported/; - 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 base qw(Mouse::Meta::Module); + +sub method_metaclass(){ 'Mouse::Meta::Method' } # required for get_method() -sub new { - my $class = shift; - my %args = @_; +sub _new { + my($class, %args) = @_; + + $args{attributes} ||= {}; + $args{methods} ||= {}; + $args{roles} ||= []; - $args{attributes} = {}; $args{superclasses} = do { no strict 'refs'; - \@{ $args{name} . '::ISA' }; + \@{ $args{package} . '::ISA' }; }; - $args{roles} ||= []; bless \%args, $class; } -sub name { $_[0]->{name} } +sub roles { $_[0]->{roles} } sub superclasses { my $self = shift; @@ -55,44 +39,11 @@ sub superclasses { @{ $self->{superclasses} }; } -sub add_method { - my $self = shift; - my $name = shift; - my $code = shift; - - my $pkg = $self->name; - - no strict 'refs'; - no warnings 'redefine'; - $self->{'methods'}->{$name}++; # Moose stores meta object here. - *{ $pkg . '::' . $name } = $code; -} - -# copied from Class::Inspector -my $get_methods_for_class = sub { - my $self = shift; - my $name = shift; - - no strict 'refs'; - # Get all the CODE symbol table entries - my @functions = - grep !/^(?:has|with|around|before|after|blessed|extends|confess|override|super)$/, - grep { defined &{"${name}::$_"} } - keys %{"${name}::"}; - push @functions, keys %{$self->{'methods'}->{$name}} if $self; - wantarray ? @functions : \@functions; -}; - -sub get_method_list { - my $self = shift; - $get_methods_for_class->($self, $self->name); -} - sub get_all_method_names { my $self = shift; my %uniq; return grep { $uniq{$_}++ == 0 } - map { $get_methods_for_class->(undef, $_) } + map { Mouse::Meta::Class->initialize($_)->get_method_list() } $self->linearized_isa; } @@ -129,7 +80,8 @@ sub add_attribute { } } -sub compute_all_applicable_attributes { +sub compute_all_applicable_attributes { shift->get_all_attributes(@_) } +sub get_all_attributes { my $self = shift; my (@attr, %seen); @@ -146,18 +98,69 @@ 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; + + 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) { + $attribute->trigger->($instance, $args->{$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"); + } + } + } + } + return $instance; +} + sub clone_object { my $class = shift; my $instance = shift; (blessed($instance) && $instance->isa($class->name)) - || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)"; + || $class->throw_error("You must pass an instance of the metaclass (" . $class->name . "), not ($instance)"); $class->clone_instance($instance, @_); } @@ -166,11 +169,11 @@ sub clone_instance { my ($class, $instance, %params) = @_; (blessed($instance)) - || confess "You can only clone instances, ($instance) is not a 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->compute_all_applicable_attributes()) { + 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}; @@ -186,10 +189,10 @@ sub make_immutable { my $self = shift; my %args = ( inline_constructor => 1, + inline_destructor => 1, @_, ); - my $name = $self->name; $self->{is_immutable}++; if ($args{inline_constructor}) { @@ -205,11 +208,10 @@ sub make_immutable { return 1; } -sub make_mutable { confess "Mouse does not currently support 'make_mutable'" } - -sub is_immutable { $_[0]->{is_immutable} } +sub make_mutable { not_supported } -sub attribute_metaclass { "Mouse::Meta::Class" } +sub is_immutable { $_[0]->{is_immutable} } +sub is_mutable { !$_[0]->{is_immutable} } sub _install_modifier { my ( $self, $into, $type, $name, $code ) = @_; @@ -228,9 +230,8 @@ sub _install_modifier { # replace this method itself :) { - no strict 'refs'; no warnings 'redefine'; - *{__PACKAGE__ . '::_install_modifier'} = sub { + *_install_modifier = sub { my ( $self, $into, $type, $name, $code ) = @_; $modifier->( $into, @@ -238,6 +239,8 @@ sub _install_modifier { $name, $code ); + $self->{methods}{$name}++; # register it to the method map + return; }; } @@ -260,49 +263,63 @@ sub add_after_method_modifier { $self->_install_modifier( $self->name, 'after', $name, $code ); } -sub roles { $_[0]->{roles} } +sub add_override_method_modifier { + my ($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) - || confess "You must supply a role name to look for"; + || $self->throw_error("You must supply a role name to look for"); + + for my $class ($self->linearized_isa) { + my $meta = Mouse::class_of($class); + next unless $meta && $meta->can('roles'); + + for my $role (@{ $meta->roles }) { - for my $role (@{ $self->{roles} }) { - return 1 if $role->name eq $role_name; + return 1 if $role->does_role($role_name); + } } return 0; } sub create { - my ($self, $package_name, %options) = @_; + my ($class, $package_name, %options) = @_; (ref $options{superclasses} eq 'ARRAY') - || confess "You must pass an ARRAY ref of superclasses" + || $class->throw_error("You must pass an ARRAY ref of superclasses") if exists $options{superclasses}; (ref $options{attributes} eq 'ARRAY') - || confess "You must pass an ARRAY ref of attributes" + || $class->throw_error("You must pass an ARRAY ref of attributes") if exists $options{attributes}; (ref $options{methods} eq 'HASH') - || confess "You must pass a HASH ref of methods" + || $class->throw_error("You must pass a HASH ref of methods") if exists $options{methods}; - do { - ( defined $package_name && $package_name ) - || confess "You must pass a package name"; + (ref $options{roles} eq 'ARRAY') + || $class->throw_error("You must pass an ARRAY ref of roles") + if exists $options{roles}; - my $code = "package $package_name;"; - $code .= "\$$package_name\:\:VERSION = '" . $options{version} . "';" - if exists $options{version}; - $code .= "\$$package_name\:\:AUTHORITY = '" . $options{authority} . "';" - if exists $options{authority}; + { + ( defined $package_name && $package_name ) + || $class->throw_error("You must pass a package name"); - eval $code; - confess "creation of $package_name failed : $@" if $@; - }; + no strict 'refs'; + ${ $package_name . '::VERSION' } = $options{version} if exists $options{version}; + ${ $package_name . '::AUTHORITY' } = $options{authority} if exists $options{authority}; + } my %initialize_options = %options; delete @initialize_options{qw( @@ -310,14 +327,15 @@ sub create { superclasses attributes methods + roles version authority )}; - my $meta = $self->initialize( $package_name => %initialize_options ); + my $meta = $class->initialize( $package_name => %initialize_options ); # FIXME totally lame $meta->add_method('meta' => sub { - $self->initialize(ref($_[0]) || $_[0]); + Mouse::Meta::Class->initialize(ref($_[0]) || $_[0]); }); $meta->superclasses(@{$options{superclasses}}) @@ -337,17 +355,67 @@ sub create { $meta->add_method($method_name, $options{methods}->{$method_name}); } } + if (exists $options{roles}){ + Mouse::Util::apply_all_roles($package_name, @{$options{roles}}); + } return $meta; } { my $ANON_CLASS_SERIAL = 0; my $ANON_CLASS_PREFIX = 'Mouse::Meta::Class::__ANON__::SERIAL::'; + + my %IMMORTAL_ANON_CLASSES; sub create_anon_class { my ( $class, %options ) = @_; + + my $cache = $options{cache}; + my $cache_key; + + if($cache){ # anonymous but not mortal + # something like Super::Class|Super::Class::2=Role|Role::1 + $cache_key = join '=' => ( + join('|', @{$options{superclasses} || []}), + join('|', sort @{$options{roles} || []}), + ); + return $IMMORTAL_ANON_CLASSES{$cache_key} if exists $IMMORTAL_ANON_CLASSES{$cache_key}; + } my $package_name = $ANON_CLASS_PREFIX . ++$ANON_CLASS_SERIAL; - return $class->create( $package_name, %options ); + my $meta = $class->create( $package_name, anon_class_id => $ANON_CLASS_SERIAL, %options ); + + if($cache){ + $IMMORTAL_ANON_CLASSES{$cache_key} = $meta; + } + else{ + Mouse::Meta::Module::weaken_metaclass($package_name); + } + return $meta; } + + sub is_anon_class{ + return exists $_[0]->{anon_class_id}; + } + + + sub DESTROY{ + my($self) = @_; + + my $serial_id = $self->{anon_class_id}; + + return if !$serial_id; + + my $stash = $self->namespace; + + @{$self->{sperclasses}} = (); + %{$stash} = (); + Mouse::Meta::Module::remove_metaclass_by_name($self->name); + + no strict 'refs'; + delete ${$ANON_CLASS_PREFIX}{ $serial_id . '::' }; + + return; + } + } 1; @@ -382,7 +450,7 @@ Gets (or sets) the list of superclasses of the owner class. 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. @@ -392,6 +460,12 @@ this class and its superclasses. 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. @@ -411,7 +485,8 @@ metaclass. =head2 clone_instance Instance, Parameters -> Instance -Clones the given C and sets any additional parameters. +The clone_instance method has been made private. +The public version is deprecated. =cut