X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FClass.pm;h=4761e5d86ebdcf6eb08370b9193d57e78eea1b6e;hb=e578d610be7812bb5fc5c861aeee01fe9270aa2f;hp=966c27db6e2152a9c6dc9a2e4b4b713e7408654f;hpb=ae3edb8ab5e65c778ef5b85425eb772468d23b07;p=gitmo%2FMouse.git diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm index 966c27d..4761e5d 100644 --- a/lib/Mouse/Meta/Class.pm +++ b/lib/Mouse/Meta/Class.pm @@ -1,11 +1,11 @@ -#!/usr/bin/env perl package Mouse::Meta::Class; use strict; use warnings; use Mouse::Meta::Method::Constructor; use Mouse::Meta::Method::Destructor; -use Mouse::Util qw/get_linear_isa blessed/; +use Scalar::Util qw/blessed weaken/; +use Mouse::Util qw/get_linear_isa version authority identifier/; use Carp 'confess'; do { @@ -20,12 +20,24 @@ do { } sub initialize { - my $class = shift; - my $name = shift; + my $class = blessed($_[0]) || $_[0]; + my $name = $_[1]; + $METACLASS_CACHE{$name} = $class->new(name => $name) if !exists($METACLASS_CACHE{$name}); return $METACLASS_CACHE{$name}; } + + # 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 { exists $METACLASS_CACHE{$_[0]} && defined $METACLASS_CACHE{$_[0]} } + sub remove_metaclass_by_name { $METACLASS_CACHE{$_[0]} = undef } }; sub new { @@ -63,31 +75,80 @@ sub add_method { my $pkg = $self->name; no strict 'refs'; + no warnings 'redefine'; + $self->{'methods'}->{$name}++; # Moose stores meta object here. *{ $pkg . '::' . $name } = $code; } +sub has_method { + my $self = shift; + my $name = shift; + $self->name->can($name); +} + # copied from Class::Inspector -sub get_method_list { +my $get_methods_for_class = sub { my $self = shift; - my $name = $self->name; + my $name = shift; no strict 'refs'; # Get all the CODE symbol table entries - my @functions = grep !/^meta$/, - grep { /\A[^\W\d]\w*\z/o } + my @functions = + grep !/^(?:has|with|around|before|after|augment|inner|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, $_) } + $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 = @_; + + 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, @_); + } + else { + $metaclass->create($self, $name, @_); + } + } + } } -sub compute_all_applicable_attributes { +sub compute_all_applicable_attributes { shift->get_all_attributes(@_) } +sub get_all_attributes { my $self = shift; my (@attr, %seen); @@ -107,6 +168,10 @@ sub compute_all_applicable_attributes { sub get_attribute_map { $_[0]->{attributes} } sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } sub get_attribute { $_[0]->{attributes}->{$_[1]} } +sub get_attribute_list { + my $self = shift; + keys %{$self->get_attribute_map}; +} sub linearized_isa { @{ get_linear_isa($_[0]->name) } } @@ -128,7 +193,7 @@ sub clone_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}; @@ -142,88 +207,133 @@ sub clone_instance { sub make_immutable { my $self = shift; + my %args = ( + inline_constructor => 1, + inline_destructor => 1, + @_, + ); + my $name = $self->name; $self->{is_immutable}++; - no strict 'refs'; - *{"$name\::new"} = Mouse::Meta::Method::Constructor->generate_constructor_method_inline( $self ); - *{"$name\::DESTROY"} = Mouse::Meta::Method::Destructor->generate_destructor_method_inline( $self ); -} -sub make_mutable { - Carp::croak "Mouse::Meta::Class->make_mutable does not supported by Mouse"; + + if ($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 { confess "Mouse does not currently support 'make_mutable'" } + sub is_immutable { $_[0]->{is_immutable} } sub attribute_metaclass { "Mouse::Meta::Class" } +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 strict 'refs'; + no warnings 'redefine'; + *{__PACKAGE__ . '::_install_modifier'} = sub { + my ( $self, $into, $type, $name, $code ) = @_; + $modifier->( + $into, + $type, + $name, + $code + ); + }; + } + + # call me. for first time. + $self->_install_modifier( $into, $type, $name, $code ); +} + sub add_before_method_modifier { - my ($self, $name, $code) = @_; - require Class::Method::Modifiers; - Class::Method::Modifiers::_install_modifier( - $self->name, - 'before', - $name, - $code, - ); + my ( $self, $name, $code ) = @_; + $self->_install_modifier( $self->name, 'before', $name, $code ); } sub add_around_method_modifier { - my ($self, $name, $code) = @_; - require Class::Method::Modifiers; - Class::Method::Modifiers::_install_modifier( - $self->name, - 'around', - $name, - $code, - ); + 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) = @_; - require Class::Method::Modifiers; - Class::Method::Modifiers::_install_modifier( - $self->name, - 'after', - $name, - $code, - ); + + my $pkg = $self->name; + my $method = "${pkg}::${name}"; + + # Class::Method::Modifiers won't do this for us, so do it ourselves + + my $body = $pkg->can($name) + or confess "You cannot override '$method' because it has no super method"; + + no strict 'refs'; + *$method = sub { $code->($pkg, $body, @_) }; } + sub roles { $_[0]->{roles} } sub does_role { my ($self, $role_name) = @_; + (defined $role_name) || confess "You must supply a role name to look for"; - for my $role (@{ $self->{roles} }) { - return 1 if $role->name eq $role_name; + + for my $class ($self->linearized_isa) { + next unless $class->can('meta') and $class->meta->can('roles'); + for my $role (@{ $class->meta->roles }) { + return 1 if $role->name eq $role_name; + } } + return 0; } sub create { - my ( $class, @args ) = @_; - - unshift @args, 'package' if @args % 2 == 1; - - my (%options) = @args; - my $package_name = $options{package}; + my ($self, $package_name, %options) = @_; (ref $options{superclasses} eq 'ARRAY') || confess "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" - if exists $options{attributes}; - + if exists $options{attributes}; + (ref $options{methods} eq 'HASH') || confess "You must pass a HASH ref of methods" - if exists $options{methods}; + if exists $options{methods}; do { - # XXX should I implement Mouse::Meta::Module? - my $package_name = $options{package}; - ( defined $package_name && $package_name ) || confess "You must pass a package name"; @@ -237,7 +347,7 @@ sub create { confess "creation of $package_name failed : $@" if $@; }; - my (%initialize_options) = @args; + my %initialize_options = %options; delete @initialize_options{qw( package superclasses @@ -246,11 +356,11 @@ sub create { version authority )}; - my $meta = $class->initialize( $package_name => %initialize_options ); + my $meta = $self->initialize( $package_name => %initialize_options ); # FIXME totally lame $meta->add_method('meta' => sub { - $class->initialize(ref($_[0]) || $_[0]); + $self->initialize(ref($_[0]) || $_[0]); }); $meta->superclasses(@{$options{superclasses}}) @@ -310,12 +420,12 @@ 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. @@ -325,7 +435,13 @@ 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. @@ -344,7 +460,8 @@ 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