X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FMeta%2FClass.pm;h=8e89567673f0389743dbd1164f7b65cfe8bc3f9a;hb=60f6eba91f12d48fa30a8e16abe2db8c95b4d878;hp=6c94c93b70c71935eb03685c04f61ba171823c81;hpb=7a59f4e85d2dadb67b6ce3112a9066cb8696611a;p=gitmo%2FMouse.git diff --git a/lib/Mouse/Meta/Class.pm b/lib/Mouse/Meta/Class.pm index 6c94c93..8e89567 100644 --- a/lib/Mouse/Meta/Class.pm +++ b/lib/Mouse/Meta/Class.pm @@ -1,13 +1,13 @@ -#!/usr/bin/env perl package Mouse::Meta::Class; use strict; use warnings; -use Scalar::Util 'blessed'; +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'; -use MRO::Compat; - do { my %METACLASS_CACHE; @@ -37,6 +37,7 @@ sub new { no strict 'refs'; \@{ $args{name} . '::ISA' }; }; + $args{roles} ||= []; bless \%args, $class; } @@ -54,11 +55,78 @@ 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, $_) } + $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 { @@ -82,14 +150,14 @@ sub get_attribute_map { $_[0]->{attributes} } sub has_attribute { exists $_[0]->{attributes}->{$_[1]} } sub get_attribute { $_[0]->{attributes}->{$_[1]} } -sub linearized_isa { @{ mro::get_linear_isa($_[0]->name) } } +sub linearized_isa { @{ get_linear_isa($_[0]->name) } } sub clone_object { my $class = shift; my $instance = shift; (blessed($instance) && $instance->isa($class->name)) - || confess "You must pass an instance ($instance) of the metaclass (" . $class->name . ")"; + || confess "You must pass an instance of the metaclass (" . $class->name . "), not ($instance)"; $class->clone_instance($instance, @_); } @@ -98,7 +166,7 @@ sub clone_instance { my ($class, $instance, %params) = @_; (blessed($instance)) - || confess "You can only clone instances, \$self is not a blessed instance"; + || confess "You can only clone instances, ($instance) is not a blessed instance"; my $clone = bless { %$instance }, ref $instance; @@ -114,6 +182,173 @@ sub clone_instance { } +sub make_immutable { + my $self = shift; + my %args = ( + inline_constructor => 1, + @_, + ); + + my $name = $self->name; + $self->{is_immutable}++; + + if ($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 { 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 ) = @_; + $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 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 $role_name; + } + + return 0; +} + +sub create { + my ($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}; + + (ref $options{methods} eq 'HASH') + || confess "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"; + + 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}; + + eval $code; + confess "creation of $package_name failed : $@" if $@; + }; + + my %initialize_options = %options; + delete @initialize_options{qw( + package + superclasses + attributes + methods + version + authority + )}; + my $meta = $self->initialize( $package_name => %initialize_options ); + + # FIXME totally lame + $meta->add_method('meta' => sub { + $self->initialize(ref($_[0]) || $_[0]); + }); + + $meta->superclasses(@{$options{superclasses}}) + if exists $options{superclasses}; + # NOTE: + # process attributes first, so that they can + # install accessors, but locally defined methods + # can then overwrite them. It is maybe a little odd, but + # I think this should be the order of things. + if (exists $options{attributes}) { + foreach my $attr (@{$options{attributes}}) { + Mouse::Meta::Attribute->create($meta, $attr->{name}, %$attr); + } + } + if (exists $options{methods}) { + foreach my $method_name (keys %{$options{methods}}) { + $meta->add_method($method_name, $options{methods}->{$method_name}); + } + } + return $meta; +} + +{ + my $ANON_CLASS_SERIAL = 0; + my $ANON_CLASS_PREFIX = 'Mouse::Meta::Class::__ANON__::SERIAL::'; + sub create_anon_class { + my ( $class, %options ) = @_; + my $package_name = $ANON_CLASS_PREFIX . ++$ANON_CLASS_SERIAL; + return $class->create( $package_name, %options ); + } +} 1; @@ -142,7 +377,7 @@ 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. @@ -157,7 +392,7 @@ this class and its superclasses. Returns a mapping of attribute names to their corresponding L objects. -=head2 has_attribute Name -> Boool +=head2 has_attribute Name -> Bool Returns whether we have a L with the given name. @@ -169,5 +404,14 @@ 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 + +Clones the given C and sets any additional parameters. + =cut