-#!/usr/bin/env perl
package Mouse::Meta::Class;
use strict;
use warnings;
-use MRO::Compat;
+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};
+ }
+
sub initialize {
my $class = shift;
my $name = shift;
sub new {
my $class = shift;
- my %args = @_;
+ my %args = @_;
$args{attributes} = {};
$args{superclasses} = do {
no strict 'refs';
\@{ $args{name} . '::ISA' };
};
+ $args{roles} ||= [];
bless \%args, $class;
}
@{ $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
+sub get_method_list {
+ my $self = shift;
+ my $name = $self->name;
+
+ no strict 'refs';
+ # Get all the CODE symbol table entries
+ my @functions =
+ grep !/^(?:has|with|around|before|after|blessed|extends|confess)$/,
+ grep { defined &{"${name}::$_"} }
+ keys %{"${name}::"};
+ push @functions, keys %{$self->{'methods'}->{$name}};
+ wantarray ? @functions : \@functions;
+}
+
sub add_attribute {
my $self = shift;
my $attr = shift;
$self->{'attributes'}{$attr->name} = $attr;
}
+sub compute_all_applicable_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 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 of the metaclass (" . $class->name . "), not ($instance)";
+
+ $class->clone_instance($instance, @_);
+}
+
+sub clone_instance {
+ my ($class, $instance, %params) = @_;
+
+ (blessed($instance))
+ || confess "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()) {
+ 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 = @_;
+ my $name = $self->name;
+ $self->{is_immutable}++;
+ $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 ));
+ }
+}
+
+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 ) = @_;
+ if (eval "require Class::Method::Modifiers::Fast; 1") {
+ Class::Method::Modifiers::Fast::_install_modifier(
+ $into,
+ $type,
+ $name,
+ $code
+ );
+ }
+ else {
+ require Class::Method::Modifiers;
+ Class::Method::Modifiers::_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;
Begins keeping track of the existing L<Mouse::Meta::Attribute> for the owner
class.
+=head2 compute_all_applicable_attributes -> (Mouse::Meta::Attribute)
+
+Returns the list of all L<Mouse::Meta::Attribute> 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<Mouse::Meta::Attribute> objects.
+=head2 has_attribute Name -> Bool
+
+Returns whether we have a L<Mouse::Meta::Attribute> with the given name.
+
=head2 get_attribute Name -> Mouse::Meta::Attribute | undef
Returns the L<Mouse::Meta::Attribute> 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<Instance> which must be an instance governed by this
+metaclass.
+
+=head2 clone_instance Instance, Parameters -> Instance
+
+Clones the given C<Instance> and sets any additional parameters.
+
=cut
projects / gitmo/Mouse.git / blobdiff