use strict;
use warnings;
-use Carp 'confess';
+use Class::MOP;
-our $VERSION = '0.01';
+use Carp 'confess';
+use Scalar::Util 'weaken', 'blessed', 'reftype';
+
+our $VERSION = '0.09';
+
+use Moose::Meta::Method::Overriden;
use base 'Class::MOP::Class';
-sub construct_instance {
+__PACKAGE__->meta->add_attribute('roles' => (
+ reader => 'roles',
+ default => sub { [] }
+));
+
+sub initialize {
+ my $class = shift;
+ my $pkg = shift;
+ $class->SUPER::initialize($pkg,
+ ':attribute_metaclass' => 'Moose::Meta::Attribute',
+ ':method_metaclass' => 'Moose::Meta::Method',
+ ':instance_metaclass' => 'Moose::Meta::Instance',
+ @_);
+}
+
+sub add_role {
+ my ($self, $role) = @_;
+ (blessed($role) && $role->isa('Moose::Meta::Role'))
+ || confess "Roles must be instances of Moose::Meta::Role";
+ push @{$self->roles} => $role;
+}
+
+sub calculate_all_roles {
+ my $self = shift;
+ my %seen;
+ grep { !$seen{$_->name}++ } map { $_->calculate_all_roles } @{ $self->roles };
+}
+
+sub does_role {
+ my ($self, $role_name) = @_;
+ (defined $role_name)
+ || confess "You must supply a role name to look for";
+ foreach my $class ($self->class_precedence_list) {
+ next unless $class->can('meta');
+ foreach my $role (@{$class->meta->roles}) {
+ return 1 if $role->does_role($role_name);
+ }
+ }
+ return 0;
+}
+
+sub excludes_role {
+ my ($self, $role_name) = @_;
+ (defined $role_name)
+ || confess "You must supply a role name to look for";
+ foreach my $class ($self->class_precedence_list) {
+ next unless $class->can('meta');
+ foreach my $role (@{$class->meta->roles}) {
+ return 1 if $role->excludes_role($role_name);
+ }
+ }
+ return 0;
+}
+
+sub new_object {
my ($class, %params) = @_;
- my $instance = $params{'__INSTANCE__'} || {};
+ my $self = $class->SUPER::new_object(%params);
foreach my $attr ($class->compute_all_applicable_attributes()) {
- my $init_arg = $attr->init_arg();
- # try to fetch the init arg from the %params ...
- my $val;
- $val = $params{$init_arg} if exists $params{$init_arg};
- # if nothing was in the %params, we can use the
- # attribute's default value (if it has one)
- $val ||= $attr->default($instance) if $attr->has_default;
- if (defined $val && $attr->has_type_constraint) {
- (defined $attr->type_constraint->($val))
- || confess "Attribute (" . $attr->name . ") does not pass the type contraint";
- }
- $instance->{$attr->name} = $val;
+ # FIXME:
+ # this does not accept undefined
+ # values, nor does it accept false
+ # values to be passed into the init-arg
+ next unless $params{$attr->init_arg} && $attr->can('has_trigger') && $attr->has_trigger;
+ $attr->trigger->($self, $params{$attr->init_arg}, $attr);
+ }
+ return $self;
+}
+
+sub construct_instance {
+ my ($class, %params) = @_;
+ my $meta_instance = $class->get_meta_instance;
+ # FIXME:
+ # the code below is almost certainly incorrect
+ # but this is foreign inheritence, so we might
+ # have to kludge it in the end.
+ my $instance = $params{'__INSTANCE__'} || $meta_instance->create_instance();
+ foreach my $attr ($class->compute_all_applicable_attributes()) {
+ $attr->initialize_instance_slot($meta_instance, $instance, \%params)
}
return $instance;
}
+
+# FIXME:
+# This is ugly
+sub get_method_map {
+ my $self = shift;
+ my $map = $self->{'%:methods'};
+
+ my $class_name = $self->name;
+ my $method_metaclass = $self->method_metaclass;
+
+ foreach my $symbol ($self->list_all_package_symbols('CODE')) {
+
+ my $code = $self->get_package_symbol('&' . $symbol);
+
+ next if exists $map->{$symbol} &&
+ defined $map->{$symbol} &&
+ $map->{$symbol}->body == $code;
+
+ my $gv = B::svref_2object($code)->GV;
+
+ my $pkg = $gv->STASH->NAME;
+ if ($pkg->can('meta') && $pkg->meta && $pkg->meta->isa('Moose::Meta::Role')) {
+ #my $role = $pkg->meta->name;
+ #next unless $self->does_role($role);
+ }
+ else {
+ next if ($gv->STASH->NAME || '') ne $class_name &&
+ ($gv->NAME || '') ne '__ANON__';
+ }
+
+ $map->{$symbol} = $method_metaclass->wrap($code);
+ }
+
+ return $map;
+}
+
+### ---------------------------------------------
+
+sub add_attribute {
+ my $self = shift;
+ my $name = shift;
+ if (scalar @_ == 1 && ref($_[0]) eq 'HASH') {
+ # NOTE:
+ # if it is a HASH ref, we de-ref it.
+ # this will usually mean that it is
+ # coming from a role
+ $self->SUPER::add_attribute($name => %{$_[0]});
+ }
+ else {
+ # otherwise we just pass the args
+ $self->SUPER::add_attribute($name => @_);
+ }
+}
+
+sub add_override_method_modifier {
+ my ($self, $name, $method, $_super_package) = @_;
+ (!$self->has_method($name))
+ || confess "Cannot add an override method if a local method is already present";
+ # need this for roles ...
+ $_super_package ||= $self->name;
+ my $super = $self->find_next_method_by_name($name);
+ (defined $super)
+ || confess "You cannot override '$name' because it has no super method";
+ $self->add_method($name => Moose::Meta::Method::Overriden->wrap(sub {
+ my @args = @_;
+ no strict 'refs';
+ no warnings 'redefine';
+ local *{$_super_package . '::super'} = sub { $super->(@args) };
+ return $method->(@args);
+ }));
+}
+
+sub add_augment_method_modifier {
+ my ($self, $name, $method) = @_;
+ (!$self->has_method($name))
+ || confess "Cannot add an augment method if a local method is already present";
+ my $super = $self->find_next_method_by_name($name);
+ (defined $super)
+ || confess "You cannot augment '$name' because it has no super method";
+ my $_super_package = $super->package_name;
+ # BUT!,... if this is an overriden method ....
+ if ($super->isa('Moose::Meta::Method::Overriden')) {
+ # we need to be sure that we actually
+ # find the next method, which is not
+ # an 'override' method, the reason is
+ # that an 'override' method will not
+ # be the one calling inner()
+ my $real_super = $self->_find_next_method_by_name_which_is_not_overridden($name);
+ $_super_package = $real_super->package_name;
+ }
+ $self->add_method($name => sub {
+ my @args = @_;
+ no strict 'refs';
+ no warnings 'redefine';
+ local *{$_super_package . '::inner'} = sub { $method->(@args) };
+ return $super->(@args);
+ });
+}
+
+## Private Utility methods ...
+
+sub _find_next_method_by_name_which_is_not_overridden {
+ my ($self, $name) = @_;
+ foreach my $method ($self->find_all_methods_by_name($name)) {
+ return $method->{code}
+ if blessed($method->{code}) && !$method->{code}->isa('Moose::Meta::Method::Overriden');
+ }
+ return undef;
+}
+
+sub _fix_metaclass_incompatability {
+ my ($self, @superclasses) = @_;
+ foreach my $super (@superclasses) {
+ # don't bother if it does not have a meta.
+ next unless $super->can('meta');
+ # if it's meta is a vanilla Moose,
+ # then we can safely ignore it.
+ next if blessed($super->meta) eq 'Moose::Meta::Class';
+ # but if we have anything else,
+ # we need to check it out ...
+ unless (# see if of our metaclass is incompatible
+ ($self->isa(blessed($super->meta)) &&
+ # and see if our instance metaclass is incompatible
+ $self->instance_metaclass->isa($super->meta->instance_metaclass)) &&
+ # ... and if we are just a vanilla Moose
+ $self->isa('Moose::Meta::Class')) {
+ # re-initialize the meta ...
+ my $super_meta = $super->meta;
+ # NOTE:
+ # We might want to consider actually
+ # transfering any attributes from the
+ # original meta into this one, but in
+ # general you should not have any there
+ # at this point anyway, so it's very
+ # much an obscure edge case anyway
+ $self = $super_meta->reinitialize($self->name => (
+ ':attribute_metaclass' => $super_meta->attribute_metaclass,
+ ':method_metaclass' => $super_meta->method_metaclass,
+ ':instance_metaclass' => $super_meta->instance_metaclass,
+ ));
+ }
+ }
+ return $self;
+}
+
+sub _apply_all_roles {
+ my ($self, @roles) = @_;
+ ($_->can('meta') && $_->meta->isa('Moose::Meta::Role'))
+ || confess "You can only consume roles, $_ is not a Moose role"
+ foreach @roles;
+ if (scalar @roles == 1) {
+ $roles[0]->meta->apply($self);
+ }
+ else {
+ # FIXME
+ # we should make a Moose::Meta::Role::Composite
+ # which is a smaller version of Moose::Meta::Role
+ # which does not use any package stuff
+ Moose::Meta::Role->combine(
+ map { $_->meta } @roles
+ )->apply($self);
+ }
+}
+
+sub _process_attribute {
+ my ($self, $name, %options) = @_;
+ if ($name =~ /^\+(.*)/) {
+ my $new_attr = $self->_process_inherited_attribute($1, %options);
+ $self->add_attribute($new_attr);
+ }
+ else {
+ if ($options{metaclass}) {
+ Moose::_load_all_classes($options{metaclass});
+ $self->add_attribute($options{metaclass}->new($name, %options));
+ }
+ else {
+ $self->add_attribute($name, %options);
+ }
+ }
+}
+
+sub _process_inherited_attribute {
+ my ($self, $attr_name, %options) = @_;
+ my $inherited_attr = $self->find_attribute_by_name($attr_name);
+ (defined $inherited_attr)
+ || confess "Could not find an attribute by the name of '$attr_name' to inherit from";
+ my $new_attr;
+ if ($inherited_attr->isa('Moose::Meta::Attribute')) {
+ $new_attr = $inherited_attr->clone_and_inherit_options(%options);
+ }
+ else {
+ # NOTE:
+ # kind of a kludge to handle Class::MOP::Attributes
+ $new_attr = Moose::Meta::Attribute::clone_and_inherit_options(
+ $inherited_attr, %options
+ );
+ }
+ return $new_attr;
+}
+
1;
__END__
Moose::Meta::Class - The Moose metaclass
-=head1 SYNOPSIS
-
=head1 DESCRIPTION
This is a subclass of L<Class::MOP::Class> with Moose specific
extensions.
+For the most part, the only time you will ever encounter an
+instance of this class is if you are doing some serious deep
+introspection. To really understand this class, you need to refer
+to the L<Class::MOP::Class> documentation.
+
=head1 METHODS
=over 4
+=item B<initialize>
+
+=item B<new_object>
+
+We override this method to support the C<trigger> attribute option.
+
=item B<construct_instance>
+This provides some Moose specific extensions to this method, you
+almost never call this method directly unless you really know what
+you are doing.
+
+This method makes sure to handle the moose weak-ref, type-constraint
+and type coercion features.
+
+=item B<get_method_map>
+
+This accommodates Moose::Meta::Role::Method instances, which are
+aliased, instead of added, but still need to be counted as valid
+methods.
+
+=item B<add_override_method_modifier ($name, $method)>
+
+This will create an C<override> method modifier for you, and install
+it in the package.
+
+=item B<add_augment_method_modifier ($name, $method)>
+
+This will create an C<augment> method modifier for you, and install
+it in the package.
+
+=item B<calculate_all_roles>
+
+=item B<roles>
+
+This will return an array of C<Moose::Meta::Role> instances which are
+attached to this class.
+
+=item B<add_role ($role)>
+
+This takes an instance of C<Moose::Meta::Role> in C<$role>, and adds it
+to the list of associated roles.
+
+=item B<does_role ($role_name)>
+
+This will test if this class C<does> a given C<$role_name>. It will
+not only check it's local roles, but ask them as well in order to
+cascade down the role hierarchy.
+
+=item B<excludes_role ($role_name)>
+
+This will test if this class C<excludes> a given C<$role_name>. It will
+not only check it's local roles, but ask them as well in order to
+cascade down the role hierarchy.
+
+=item B<add_attribute ($attr_name, %params|$params)>
+
+This method does the same thing as L<Class::MOP::Class::add_attribute>, but adds
+support for taking the C<$params> as a HASH ref.
+
=back
=head1 BUGS
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
-=cut
\ No newline at end of file
+=cut
+
projects / gitmo/Moose.git / blobdiff