2 package Moose::Meta::Attribute::Native::Trait;
5 use Class::Load qw(load_class);
6 use List::MoreUtils qw( any uniq );
7 use Moose::Util::TypeConstraints;
10 requires '_helper_type';
12 has _used_default_is => (
18 before '_process_options' => sub {
19 my ( $self, $name, $options ) = @_;
21 $self->_check_helper_type( $options, $name );
23 if ( !( any { exists $options->{$_} } qw( is reader writer accessor ) )
24 && $self->can('_default_is') ) {
26 $options->{is} = $self->_default_is;
28 $options->{_used_default_is} = 1;
34 || any { exists $options->{$_} } qw( default builder lazy_build )
36 && $self->can('_default_default')
39 $options->{default} = $self->_default_default;
41 Moose::Deprecated::deprecated(
42 feature => 'default default for Native Trait',
44 'Allowing a native trait to automatically supply a default is deprecated.'
45 . ' You can avoid this warning by supplying a default, builder, or making the attribute required'
50 after 'install_accessors' => sub {
53 return unless $self->_used_default_is;
56 = $self->_default_is eq 'rw'
57 ? qw( reader writer accessor )
60 my $name = $self->name;
61 my $class = $self->associated_class->name;
63 for my $meth ( uniq grep {defined} map { $self->$_ } @methods ) {
66 = "The $meth method in the $class class was automatically created"
67 . " by the native delegation trait for the $name attribute."
68 . q{ This "default is" feature is deprecated.}
69 . q{ Explicitly set "is" or define accessor names to avoid this};
71 $self->associated_class->add_before_method_modifier(
73 Moose::Deprecated::deprecated(
74 feature => 'default is for Native Trait',
82 sub _check_helper_type {
83 my ( $self, $options, $name ) = @_;
85 my $type = $self->_helper_type;
87 $options->{isa} = $type
88 unless exists $options->{isa};
90 my $isa = Moose::Util::TypeConstraints::find_or_create_type_constraint(
93 ( $isa->is_a_type_of($type) )
95 "The type constraint for $name must be a subtype of $type but it's a $isa";
98 before 'install_accessors' => sub { (shift)->_check_handles_values };
100 sub _check_handles_values {
103 my %handles = $self->_canonicalize_handles;
105 for my $original_method ( values %handles ) {
106 my $name = $original_method->[0];
108 my $accessor_class = $self->_native_accessor_class_for($name);
110 ( $accessor_class && $accessor_class->can('new') )
112 "$name is an unsupported method type - $accessor_class";
116 around '_canonicalize_handles' => sub {
119 my $handles = $self->handles;
121 return unless $handles;
123 unless ( 'HASH' eq ref $handles ) {
125 "The 'handles' option must be a HASH reference, not $handles");
129 map { $_ => $self->_canonicalize_handles_value( $handles->{$_} ) }
133 sub _canonicalize_handles_value {
137 if ( ref $value && 'ARRAY' ne ref $value ) {
139 "All values passed to handles must be strings or ARRAY references, not $value"
143 return ref $value ? $value : [$value];
146 around '_make_delegation_method' => sub {
148 my ( $self, $handle_name, $method_to_call ) = @_;
150 my ( $name, @curried_args ) = @$method_to_call;
152 my $accessor_class = $self->_native_accessor_class_for($name);
154 die "Cannot find an accessor class for $name"
155 unless $accessor_class && $accessor_class->can('new');
157 return $accessor_class->new(
158 name => $handle_name,
159 package_name => $self->associated_class->name,
160 delegate_to_method => $name,
163 curried_arguments => \@curried_args,
164 root_types => [ $self->_root_types ],
169 return $_[0]->_helper_type;
172 sub _native_accessor_class_for {
173 my ( $self, $suffix ) = @_;
176 = 'Moose::Meta::Method::Accessor::Native::'
177 . $self->_native_type . '::'
181 return Moose::Meta::Class->create_anon_class(
183 [ $self->accessor_metaclass, $self->delegation_metaclass ],
189 sub _build_native_type {
192 for my $role_name ( map { $_->name } $self->meta->calculate_all_roles ) {
193 return $1 if $role_name =~ /::Native::Trait::(\w+)$/;
196 die "Cannot calculate native type for " . ref $self;
199 has '_native_type' => (
203 builder => '_build_native_type',
207 no Moose::Util::TypeConstraints;
211 # ABSTRACT: Shared role for native delegation traits
217 See L<Moose/BUGS> for details on reporting bugs.
221 Documentation for Moose native traits can be found in
222 L<Moose::Meta::Attribute::Native>.