Moose-2.1405HEADMoose-2.1405master

1 files changed, 314 insertions, 0 deletions

diff --git a/lib/Moose/Meta/Role/Application/ToClass.pm b/lib/Moose/Meta/Role/Application/ToClass.pm
new file mode 100644
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+++ b/lib/Moose/Meta/Role/Application/ToClass.pm
@@ -0,0 +1,314 @@
+package Moose::Meta::Role::Application::ToClass;
+our $VERSION = '2.1405';
+
+use strict;
+use warnings;
+use metaclass;
+
+use List::Util 'first';
+use Moose::Util 'throw_exception';
+use Scalar::Util 'weaken';
+
+use parent 'Moose::Meta::Role::Application';
+
+__PACKAGE__->meta->add_attribute('role' => (
+    reader => 'role',
+    Class::MOP::_definition_context(),
+));
+
+__PACKAGE__->meta->add_attribute('class' => (
+    accessor => 'class',
+    Class::MOP::_definition_context(),
+));
+
+sub apply {
+    my ($self, $role, $class) = @_;
+
+    # We need weak_ref in CMOP :(
+    weaken($self->{role}  = $role);
+    weaken($self->{class} = $class);
+
+    $self->SUPER::apply($role, $class);
+
+    $class->add_role($role);
+    $class->add_role_application($self);
+}
+
+sub check_role_exclusions {
+    my ($self, $role, $class) = @_;
+    if ($class->excludes_role($role->name)) {
+        throw_exception( ConflictDetectedInCheckRoleExclusionsInToClass => class_name => $class->name,
+                                                                           role_name  => $role->name,
+                       );
+    }
+    foreach my $excluded_role_name ($role->get_excluded_roles_list) {
+        if ($class->does_role($excluded_role_name)) {
+            throw_exception( ClassDoesTheExcludedRole => role_name          => $role->name,
+                                                         excluded_role_name => $excluded_role_name,
+                                                         class_name         => $class->name,
+                           );
+        }
+    }
+}
+
+sub check_required_methods {
+    my ($self, $role, $class) = @_;
+
+    my @missing;
+    my @is_attr;
+
+    # NOTE:
+    # we might need to move this down below the
+    # the attributes so that we can require any
+    # attribute accessors. However I am thinking
+    # that maybe those are somehow exempt from
+    # the require methods stuff.
+    foreach my $required_method ($role->get_required_method_list) {
+        my $required_method_name = $required_method->name;
+
+        if (!$class->find_method_by_name($required_method_name)) {
+
+            next if $self->is_aliased_method($required_method_name);
+
+            push @missing, $required_method;
+        }
+    }
+
+    return unless @missing;
+
+    my $error = '';
+
+    @missing = sort { $a->name cmp $b->name } @missing;
+    my @conflicts = grep { $_->isa('Moose::Meta::Role::Method::Conflicting') } @missing;
+
+    if (@conflicts) {
+        my $conflict = $conflicts[0];
+        my $roles = $conflict->roles_as_english_list;
+
+        my @same_role_conflicts = grep { $_->roles_as_english_list eq $roles } @conflicts;
+
+        throw_exception( MethodNameConflictInRoles => conflict   => \@same_role_conflicts,
+                                                      class_name => $class->name
+                       );
+    }
+    elsif (@missing) {
+        if (my $meth = first { $class->name->can($_) } @missing) {
+            throw_exception( RequiredMethodsImportedByClass => class_name      => $class->name,
+                                                               role_name       => $role->name,
+                                                               missing_methods => \@missing,
+                                                               imported_method => $meth
+                           );
+        }
+        else {
+            throw_exception( RequiredMethodsNotImplementedByClass => class_name      => $class->name,
+                                                                     role_name       => $role->name,
+                                                                     missing_methods => \@missing,
+                           );
+        }
+    }
+}
+
+sub check_required_attributes {
+
+}
+
+sub apply_attributes {
+    my ($self, $role, $class) = @_;
+
+    foreach my $attribute_name ($role->get_attribute_list) {
+        # it if it has one already
+        if ($class->has_attribute($attribute_name) &&
+            # make sure we haven't seen this one already too
+            $class->get_attribute($attribute_name) != $role->get_attribute($attribute_name)) {
+            next;
+        }
+        else {
+            $class->add_attribute(
+                $role->get_attribute($attribute_name)->attribute_for_class
+            );
+        }
+    }
+}
+
+sub apply_methods {
+    my ( $self, $role, $class ) = @_;
+
+    foreach my $method ( $role->_get_local_methods ) {
+        my $method_name = $method->name;
+
+        next if $method->isa('Class::MOP::Method::Meta');
+
+        unless ( $self->is_method_excluded($method_name) ) {
+
+            my $class_method = $class->get_method($method_name);
+
+            next if $class_method && $class_method->body != $method->body;
+
+            $class->add_method(
+                $method_name,
+                $method,
+            );
+        }
+
+        next unless $self->is_method_aliased($method_name);
+
+        my $aliased_method_name = $self->get_method_aliases->{$method_name};
+
+        my $class_method = $class->get_method($aliased_method_name);
+
+        if ( $class_method && $class_method->body != $method->body ) {
+            throw_exception( CannotCreateMethodAliasLocalMethodIsPresentInClass => aliased_method_name => $aliased_method_name,
+                                                                                   method              => $method,
+                                                                                   role_name           => $role->name,
+                                                                                   class_name          => $class->name,
+                           );
+        }
+
+        $class->add_method(
+            $aliased_method_name,
+            $method,
+        );
+    }
+
+    # we must reset the cache here since
+    # we are just aliasing methods, otherwise
+    # the modifiers go wonky.
+    $class->reset_package_cache_flag;
+}
+
+sub apply_override_method_modifiers {
+    my ($self, $role, $class) = @_;
+    foreach my $method_name ($role->get_method_modifier_list('override')) {
+        # it if it has one already then ...
+        if ($class->has_method($method_name)) {
+            next;
+        }
+        else {
+            # if this is not a role, then we need to
+            # find the original package of the method
+            # so that we can tell the class were to
+            # find the right super() method
+            my $method = $role->get_override_method_modifier($method_name);
+            my ($package) = Class::MOP::get_code_info($method);
+            # if it is a class, we just add it
+            $class->add_override_method_modifier($method_name, $method, $package);
+        }
+    }
+}
+
+sub apply_method_modifiers {
+    my ($self, $modifier_type, $role, $class) = @_;
+    my $add = "add_${modifier_type}_method_modifier";
+    my $get = "get_${modifier_type}_method_modifiers";
+    foreach my $method_name ($role->get_method_modifier_list($modifier_type)) {
+        $class->$add(
+            $method_name,
+            $_
+        ) foreach $role->$get($method_name);
+    }
+}
+
+1;
+
+# ABSTRACT: Compose a role into a class
+
+__END__
+
+=pod
+
+=encoding UTF-8
+
+=head1 NAME
+
+Moose::Meta::Role::Application::ToClass - Compose a role into a class
+
+=head1 VERSION
+
+version 2.1405
+
+=head1 DESCRIPTION
+
+=head2 METHODS
+
+=over 4
+
+=item B<new>
+
+=item B<meta>
+
+=item B<apply>
+
+=item B<check_role_exclusions>
+
+=item B<check_required_methods>
+
+=item B<check_required_attributes>
+
+=item B<apply_attributes>
+
+=item B<apply_methods>
+
+=item B<apply_method_modifiers>
+
+=item B<apply_override_method_modifiers>
+
+=back
+
+=head1 BUGS
+
+See L<Moose/BUGS> for details on reporting bugs.
+
+=head1 AUTHORS
+
+=over 4
+
+=item *
+
+Stevan Little <stevan.little@iinteractive.com>
+
+=item *
+
+Dave Rolsky <autarch@urth.org>
+
+=item *
+
+Jesse Luehrs <doy@tozt.net>
+
+=item *
+
+Shawn M Moore <code@sartak.org>
+
+=item *
+
+יובל קוג'מן (Yuval Kogman) <nothingmuch@woobling.org>
+
+=item *
+
+Karen Etheridge <ether@cpan.org>
+
+=item *
+
+Florian Ragwitz <rafl@debian.org>
+
+=item *
+
+Hans Dieter Pearcey <hdp@weftsoar.net>
+
+=item *
+
+Chris Prather <chris@prather.org>
+
+=item *
+
+Matt S Trout <mst@shadowcat.co.uk>
+
+=back
+
+=head1 COPYRIGHT AND LICENSE
+
+This software is copyright (c) 2006 by Infinity Interactive, Inc..
+
+This is free software; you can redistribute it and/or modify it under
+the same terms as the Perl 5 programming language system itself.
+
+=cut