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mschuepbach
314
CPAN/Moose/Meta/Role/Application/ToClass.pm
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314
CPAN/Moose/Meta/Role/Application/ToClass.pm
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package Moose::Meta::Role::Application::ToClass;
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our $VERSION = '2.2207';
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use strict;
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use warnings;
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use metaclass;
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use List::Util 'first';
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use Moose::Util 'throw_exception';
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use Scalar::Util 'weaken';
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use parent 'Moose::Meta::Role::Application';
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__PACKAGE__->meta->add_attribute('role' => (
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reader => 'role',
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Class::MOP::_definition_context(),
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));
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__PACKAGE__->meta->add_attribute('class' => (
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accessor => 'class',
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Class::MOP::_definition_context(),
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));
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sub apply {
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my ($self, $role, $class) = @_;
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# We need weak_ref in CMOP :(
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weaken($self->{role} = $role);
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weaken($self->{class} = $class);
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$self->SUPER::apply($role, $class);
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$class->add_role($role);
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$class->add_role_application($self);
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}
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sub check_role_exclusions {
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my ($self, $role, $class) = @_;
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if ($class->excludes_role($role->name)) {
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throw_exception( ConflictDetectedInCheckRoleExclusionsInToClass => class_name => $class->name,
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role_name => $role->name,
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);
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}
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foreach my $excluded_role_name ($role->get_excluded_roles_list) {
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if ($class->does_role($excluded_role_name)) {
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throw_exception( ClassDoesTheExcludedRole => role_name => $role->name,
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excluded_role_name => $excluded_role_name,
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class_name => $class->name,
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);
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}
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}
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}
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sub check_required_methods {
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my ($self, $role, $class) = @_;
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my @missing;
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my @is_attr;
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# NOTE:
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# we might need to move this down below the
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# the attributes so that we can require any
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# attribute accessors. However I am thinking
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# that maybe those are somehow exempt from
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# the require methods stuff.
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foreach my $required_method ($role->get_required_method_list) {
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my $required_method_name = $required_method->name;
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if (!$class->find_method_by_name($required_method_name)) {
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next if $self->is_aliased_method($required_method_name);
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push @missing, $required_method;
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}
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}
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return unless @missing;
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my $error = '';
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@missing = sort { $a->name cmp $b->name } @missing;
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my @conflicts = grep { $_->isa('Moose::Meta::Role::Method::Conflicting') } @missing;
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if (@conflicts) {
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my $conflict = $conflicts[0];
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my $roles = $conflict->roles_as_english_list;
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my @same_role_conflicts = grep { $_->roles_as_english_list eq $roles } @conflicts;
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throw_exception( MethodNameConflictInRoles => conflict => \@same_role_conflicts,
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class_name => $class->name
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);
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}
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elsif (@missing) {
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if (my $meth = first { $class->name->can($_) } @missing) {
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throw_exception( RequiredMethodsImportedByClass => class_name => $class->name,
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role_name => $role->name,
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missing_methods => \@missing,
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imported_method => $meth
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);
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}
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else {
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throw_exception( RequiredMethodsNotImplementedByClass => class_name => $class->name,
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role_name => $role->name,
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missing_methods => \@missing,
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);
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}
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}
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}
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sub check_required_attributes {
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}
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sub apply_attributes {
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my ($self, $role, $class) = @_;
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foreach my $attribute_name ($role->get_attribute_list) {
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# it if it has one already
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if ($class->has_attribute($attribute_name) &&
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# make sure we haven't seen this one already too
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$class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) {
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next;
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}
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else {
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$class->add_attribute(
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$role->get_attribute($attribute_name)->attribute_for_class
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);
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}
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}
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}
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sub apply_methods {
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my ( $self, $role, $class ) = @_;
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foreach my $method ( $role->_get_local_methods ) {
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my $method_name = $method->name;
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next if $method->isa('Class::MOP::Method::Meta');
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unless ( $self->is_method_excluded($method_name) ) {
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my $class_method = $class->get_method($method_name);
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next if $class_method && $class_method->body != $method->body;
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$class->add_method(
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$method_name,
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$method,
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);
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}
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next unless $self->is_method_aliased($method_name);
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my $aliased_method_name = $self->get_method_aliases->{$method_name};
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my $class_method = $class->get_method($aliased_method_name);
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if ( $class_method && $class_method->body != $method->body ) {
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throw_exception( CannotCreateMethodAliasLocalMethodIsPresentInClass => aliased_method_name => $aliased_method_name,
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method => $method,
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role_name => $role->name,
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class_name => $class->name,
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);
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}
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$class->add_method(
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$aliased_method_name,
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$method,
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);
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}
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# we must reset the cache here since
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# we are just aliasing methods, otherwise
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# the modifiers go wonky.
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$class->reset_package_cache_flag;
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}
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sub apply_override_method_modifiers {
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my ($self, $role, $class) = @_;
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foreach my $method_name ($role->get_method_modifier_list('override')) {
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# it if it has one already then ...
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if ($class->has_method($method_name)) {
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next;
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}
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else {
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# if this is not a role, then we need to
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# find the original package of the method
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# so that we can tell the class were to
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# find the right super() method
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my $method = $role->get_override_method_modifier($method_name);
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my ($package) = Class::MOP::get_code_info($method);
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# if it is a class, we just add it
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$class->add_override_method_modifier($method_name, $method, $package);
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}
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}
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}
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sub apply_method_modifiers {
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my ($self, $modifier_type, $role, $class) = @_;
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my $add = "add_${modifier_type}_method_modifier";
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my $get = "get_${modifier_type}_method_modifiers";
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foreach my $method_name ($role->get_method_modifier_list($modifier_type)) {
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$class->$add(
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$method_name,
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$_
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) foreach $role->$get($method_name);
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}
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}
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1;
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# ABSTRACT: Compose a role into a class
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__END__
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=pod
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=encoding UTF-8
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=head1 NAME
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Moose::Meta::Role::Application::ToClass - Compose a role into a class
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=head1 VERSION
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version 2.2207
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=head1 DESCRIPTION
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=head2 METHODS
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=over 4
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=item B<new>
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=item B<meta>
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=item B<apply>
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=item B<check_role_exclusions>
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=item B<check_required_methods>
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=item B<check_required_attributes>
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=item B<apply_attributes>
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=item B<apply_methods>
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=item B<apply_method_modifiers>
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=item B<apply_override_method_modifiers>
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=back
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=head1 BUGS
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See L<Moose/BUGS> for details on reporting bugs.
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=head1 AUTHORS
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=over 4
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=item *
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Stevan Little <stevan@cpan.org>
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=item *
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Dave Rolsky <autarch@urth.org>
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=item *
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Jesse Luehrs <doy@cpan.org>
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=item *
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Shawn M Moore <sartak@cpan.org>
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=item *
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יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
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=item *
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Karen Etheridge <ether@cpan.org>
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=item *
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Florian Ragwitz <rafl@debian.org>
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=item *
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Hans Dieter Pearcey <hdp@cpan.org>
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=item *
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Chris Prather <chris@prather.org>
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=item *
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Matt S Trout <mstrout@cpan.org>
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=back
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=head1 COPYRIGHT AND LICENSE
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This software is copyright (c) 2006 by Infinity Interactive, Inc.
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This is free software; you can redistribute it and/or modify it under
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the same terms as the Perl 5 programming language system itself.
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=cut
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