X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMoose%2FMeta%2FRole%2FApplication%2FToClass.pm;h=48e4658e1406eeeb055d341c820b1a721bee0a68;hb=0f8380b0cdbda1e13ed7c456edd3f0d1c0315ec9;hp=58778110faf7f09107d885833aba51d4578ed44a;hpb=fb1e11d526a7d3608132ba484525980e9fafcc4f;p=gitmo%2FMoose.git

diff --git a/lib/Moose/Meta/Role/Application/ToClass.pm b/lib/Moose/Meta/Role/Application/ToClass.pm
index 5877811..48e4658 100644
--- a/lib/Moose/Meta/Role/Application/ToClass.pm
+++ b/lib/Moose/Meta/Role/Application/ToClass.pm
@@ -4,16 +4,201 @@ use strict;
 use warnings;
 use metaclass;
 
-use Carp            'confess';
-use Scalar::Util    'blessed';
+use Moose::Util  'english_list';
+use Scalar::Util 'weaken', 'blessed';
 
-use Data::Dumper;
-
-our $VERSION   = '0.01';
+our $VERSION   = '0.86';
+$VERSION = eval $VERSION;
 our $AUTHORITY = 'cpan:STEVAN';
 
 use base 'Moose::Meta::Role::Application';
 
+__PACKAGE__->meta->add_attribute('role' => (
+    reader => 'role',
+));
+
+__PACKAGE__->meta->add_attribute('class' => (
+    reader => 'class',
+));
+
+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)) {
+        $class->throw_error("Conflict detected: " . $class->name . " excludes role '" . $role->name . "'");
+    }
+    foreach my $excluded_role_name ($role->get_excluded_roles_list) {
+        if ($class->does_role($excluded_role_name)) {
+            $class->throw_error("The class " . $class->name . " does the excluded role '$excluded_role_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 = '';
+
+    my @conflicts = grep { $_->isa('Moose::Meta::Role::Method::Conflicting') } @missing;
+
+    if (@conflicts) {
+        my $conflict = $conflicts[0];
+        my $roles = Moose::Util::english_list( map { q{'} . $_ . q{'} } @{ $conflict->roles } );
+
+        $error
+            .= "Due to a method name conflict in roles "
+            .  $roles
+            . ", the method '"
+            . $conflict->name
+            . "' must be implemented or excluded by '"
+            . $class->name
+            . q{'};
+    }
+    elsif (@missing) {
+        my $noun = @missing == 1 ? 'method' : 'methods';
+
+        my $list
+            = Moose::Util::english_list( map { q{'} . $_ . q{'} } @missing );
+
+        $error
+            .= q{'}
+            . $role->name
+            . "' requires the $noun $list "
+            . "to be implemented by '"
+            . $class->name . q{'};
+    }
+
+    $class->throw_error($error);
+}
+
+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(
+                $attribute_name,
+                $role->get_attribute($attribute_name)
+            );
+        }
+    }
+}
+
+sub apply_methods {
+    my ($self, $role, $class) = @_;
+    foreach my $method_name ($role->get_method_list) {
+
+        unless ($self->is_method_excluded($method_name)) {
+            # it if it has one already
+            if ($class->has_method($method_name) &&
+                # and if they are not the same thing ...
+                $class->get_method($method_name)->body != $role->get_method($method_name)->body) {
+                next;
+            }
+            else {
+                # add it, although it could be overridden
+                $class->add_method(
+                    $method_name,
+                    $role->get_method($method_name)
+                );
+            }
+        }
+
+        if ($self->is_method_aliased($method_name)) {
+            my $aliased_method_name = $self->get_method_aliases->{$method_name};
+            # it if it has one already
+            if ($class->has_method($aliased_method_name) &&
+                # and if they are not the same thing ...
+                $class->get_method($aliased_method_name)->body != $role->get_method($method_name)->body) {
+                $class->throw_error("Cannot create a method alias if a local method of the same name exists");
+            }
+            $class->add_method(
+                $aliased_method_name,
+                $role->get_method($method_name)
+            );
+        }
+    }
+    # 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;
 
 __END__
@@ -22,7 +207,7 @@ __END__
 
 =head1 NAME
 
-Moose::Meta::Role::Application::ToClass
+Moose::Meta::Role::Application::ToClass - Compose a role into a class
 
 =head1 DESCRIPTION
 
@@ -34,6 +219,22 @@ Moose::Meta::Role::Application::ToClass
 
 =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
@@ -48,7 +249,7 @@ Stevan Little E<lt>stevan@iinteractive.comE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006, 2007 by Infinity Interactive, Inc.
+Copyright 2006-2009 by Infinity Interactive, Inc.
 
 L<http://www.iinteractive.com>